[go: up one dir, main page]

CN103760142A - Optical measuring method and device for spatial distribution of liquid droplets of fuel nozzle - Google Patents

Optical measuring method and device for spatial distribution of liquid droplets of fuel nozzle Download PDF

Info

Publication number
CN103760142A
CN103760142A CN201410016338.6A CN201410016338A CN103760142A CN 103760142 A CN103760142 A CN 103760142A CN 201410016338 A CN201410016338 A CN 201410016338A CN 103760142 A CN103760142 A CN 103760142A
Authority
CN
China
Prior art keywords
fuel
cone
laser
fuel nozzle
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410016338.6A
Other languages
Chinese (zh)
Inventor
刘存喜
刘富强
杨金虎
穆勇
徐纲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Engineering Thermophysics of CAS
Original Assignee
Institute of Engineering Thermophysics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Engineering Thermophysics of CAS filed Critical Institute of Engineering Thermophysics of CAS
Priority to CN201410016338.6A priority Critical patent/CN103760142A/en
Publication of CN103760142A publication Critical patent/CN103760142A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

本发明公开了一种燃油喷嘴液滴空间分布光学测量方法及装置,利用航空煤油中的芳香族化合物在波长为266nm的紫外光激发下能够发出红移的荧光信号,并且设计了激光能量在雾锥中衰减引起燃油空间分布测量误差的校正方案。其特征在于可以快速准确的测量燃油雾锥中液滴的空间分布,具有不干扰流场的优点,可以得到瞬态和时间平均结果,解决了燃油累积法只能测量平均结果的不足。本发明的燃油喷嘴液滴空间分布光学测量方法可以用于航空发动机或内燃机燃油喷嘴雾锥中液滴空间分布特性的测量,对于不含荧光组分的燃油,需添加示踪剂。

Figure 201410016338

The invention discloses an optical measurement method and device for the spatial distribution of fuel nozzle droplets, which uses aromatic compounds in aviation kerosene to emit red-shifted fluorescent signals under the excitation of ultraviolet light with a wavelength of 266nm, and designs laser energy in fog A correction scheme for measurement errors in fuel spatial distribution caused by in-cone attenuation. It is characterized in that it can quickly and accurately measure the spatial distribution of droplets in the fuel mist cone, has the advantage of not disturbing the flow field, can obtain transient and time-averaged results, and solves the problem that the fuel accumulation method can only measure the average result. The optical measurement method of the droplet spatial distribution of the fuel nozzle of the present invention can be used to measure the spatial distribution characteristics of the droplet in the fog cone of the fuel nozzle of an aeroengine or an internal combustion engine, and a tracer needs to be added to the fuel oil without fluorescent components.

Figure 201410016338

Description

一种燃油喷嘴液滴空间分布光学测量方法及装置Optical measurement method and device for spatial distribution of fuel nozzle droplets

技术领域technical field

本发明涉及一种燃油喷嘴液滴空间分布光学测量方法及装置,尤其涉及一种利用RP-3航空煤油中的芳香族化合物在波长为266nm的紫外光激发时发出的荧光信号用于燃油空间分布测量的光学测试及误差校正技术。The invention relates to an optical measurement method and device for the spatial distribution of fuel nozzle droplets, in particular to a method for utilizing the fluorescent signal emitted by aromatic compounds in RP-3 aviation kerosene when excited by ultraviolet light with a wavelength of 266nm for the spatial distribution of fuel oil. Optical testing and error correction techniques for measurements.

背景技术Background technique

发展先进的燃气轮机燃烧室技术主要依靠良好的雾化、空气和燃料快速并且均一的掺混,这种方式可以避免对燃烧性能、污染物排放和发动机寿命不利的条件出现。液滴平均粒径、粒径分布和燃油空间分布等雾化特性都对燃烧室的性能具有重要的影响。The development of advanced gas turbine combustor technology relies on good atomization, rapid and uniform mixing of air and fuel, in this way to avoid adverse conditions for combustion performance, pollutant emissions and engine life. Atomization characteristics such as average droplet size, particle size distribution and spatial distribution of fuel all have a significant impact on the performance of the combustor.

为提高燃烧效率、降低污染物排放和优化燃烧室出口温度分布,除保证液滴足够小使蒸发过程不是燃烧效率的决定因素外,燃烧室中燃料分布要均匀,因此雾锥燃油空间分布是雾化特性的一重要方面。人为的观察很难发现雾锥的非对称性,除非雾锥非对称性特别严重。因此,对于喷嘴的设计和雾化质量检测需要定量的分析燃油空间分布特性。雾锥中燃油的空间分布特性一般通过径向和周向分布不均匀度表示,其测量方法可以分为两大类:接触式的传统测量方法和非接触式的光学测量方法。燃油径向分布不均匀度传统的检测方法是在喷嘴下方沿径向等角度或等距离布置若干量筒,由量筒中的燃油高度得到燃油沿径向的分布。燃油周向分布不均匀度传统的检测方法是将喷嘴处于中心,喷嘴雾锥的下部周向分为若干扇形区域,一般为12或16个(见图1),把每个扇形区域中的燃油分别收集到容器中,每个容器中燃油量的标准误差表示燃油周向分布不均匀度。虽然传统的检测方法可以给出燃油的空间分布特性,但介入式的传统方法中收集燃油容器的加工精度,对雾锥及周围空气流场的影响,以及燃油喷嘴的安装精度都对周向与径向分布均匀性有较大的影响,测量精度不高。传统的径向和周向两次测量经常产生较大的不重复性。另外,传统的检测方法只能测量一定时间区间内的平均值,不能测量燃油的瞬态分布。非介入式激光诊断方法的出现,解决了介入式方法对雾锥及流场影响的问题。用于流量显示、粒径和燃油分布测量的激光诊断技术包括粒子图像测速仪(PIV)、平面激光诱导荧光(PLIF)、相位多普勒粒子分析仪(PDPA)和平面激光散射方法(PLS)等。基于Lorenz-Mie散射理论的PLS方法已经在雾锥空间分布特性的测量中得到应用,但PLS方法在粒径小于50μm的局部区域,散射信号的强度大于实际的燃油质量分布,因此粒径小于50μm的局部区域,PLS方法测量的燃油质量分布偏大。PLIF方法基于燃油中添加的荧光染料在一定波长的光照射时发出荧光,荧光信号的强度和粒径的立方成正比。但PLIF方法只能用于液滴浓度比较稀疏的雾锥,在液滴浓度较大雾锥中激光强度在测试区沿光程方向成指数减弱,导致沿光程测试区后部激光强度很弱,因此,沿光程测试区后部荧光信号很弱,引起燃油分布测量误差。In order to improve combustion efficiency, reduce pollutant emissions and optimize the temperature distribution at the outlet of the combustion chamber, in addition to ensuring that the droplets are small enough so that the evaporation process is not the decisive factor for combustion efficiency, the fuel distribution in the combustion chamber must be uniform, so the spatial distribution of the fog cone fuel is fog An important aspect of cultural characteristics. It is difficult to find the asymmetry of the fog cone by artificial observation, unless the asymmetry of the fog cone is particularly serious. Therefore, for nozzle design and atomization quality detection, it is necessary to quantitatively analyze the spatial distribution characteristics of fuel. The spatial distribution characteristics of fuel oil in the fog cone are generally expressed by the unevenness of radial and circumferential distributions, and the measurement methods can be divided into two categories: traditional contact measurement methods and non-contact optical measurement methods. The traditional detection method for the unevenness of fuel radial distribution is to arrange several measuring cylinders at equal angles or distances in the radial direction below the nozzle, and obtain the fuel oil distribution in the radial direction from the height of the fuel in the measuring cylinders. The traditional detection method for the unevenness of fuel oil circumferential distribution is to place the nozzle at the center, and divide the lower part of the nozzle mist cone into several fan-shaped areas, generally 12 or 16 (see Figure 1), and divide the fuel oil in each fan-shaped area Collected separately into containers, the standard error of the amount of fuel in each container indicates the unevenness of the circumferential distribution of fuel. Although the traditional detection method can give the spatial distribution characteristics of the fuel, the processing accuracy of the fuel collection container in the traditional interventional method, the influence on the fog cone and the surrounding air flow field, and the installation accuracy of the fuel nozzle all affect the circumferential and The uniformity of radial distribution has a greater influence, and the measurement accuracy is not high. Traditional two measurements radially and circumferentially often yield large non-repeatability. In addition, traditional detection methods can only measure the average value within a certain time interval, and cannot measure the transient distribution of fuel. The emergence of non-invasive laser diagnostic methods has solved the problem of the impact of invasive methods on fog cones and flow fields. Laser diagnostic techniques for flow display, particle size and fuel distribution measurement include Particle Image Velocimetry (PIV), Planar Laser Induced Fluorescence (PLIF), Phase Doppler Particle Analyzer (PDPA) and Planar Laser Scattering Method (PLS) wait. The PLS method based on the Lorenz-Mie scattering theory has been applied in the measurement of the spatial distribution characteristics of the fog cone, but the intensity of the scattering signal of the PLS method is greater than the actual fuel mass distribution in the local area where the particle size is less than 50 μm, so the particle size is less than 50 μm In the local area of , the distribution of fuel mass measured by the PLS method is too large. The PLIF method is based on the fact that the fluorescent dye added to the fuel emits fluorescence when irradiated with light of a certain wavelength, and the intensity of the fluorescent signal is proportional to the cube of the particle size. However, the PLIF method can only be used for the fog cone with relatively sparse droplet concentration. In the fog cone with relatively large droplet concentration, the laser intensity decreases exponentially along the optical path direction in the test area, resulting in very weak laser intensity at the rear of the test area along the optical path. , therefore, the fluorescent signal at the rear of the test area along the optical path is very weak, which causes errors in the measurement of fuel oil distribution.

发明内容Contents of the invention

本发明要解决的技术问题是:为克服上述现有技术的缺点和不足,本发明采用燃油激光诱导荧光方法实现燃油喷嘴雾锥中液滴空间分布特性测量,设计了燃油分布光学测量试验方案和图像处理方案,并设计了激光能量在雾锥中衰减引起燃油分布测量误差的校正方案,提高了燃油分布光学测量的速度和精度。The technical problem to be solved by the present invention is: in order to overcome the shortcomings and deficiencies of the above-mentioned prior art, the present invention adopts the laser-induced fluorescence method of fuel oil to realize the measurement of the spatial distribution characteristics of droplets in the fog cone of the fuel nozzle, and designs the optical measurement test scheme of the fuel distribution and The image processing scheme is designed, and the correction scheme of the fuel distribution measurement error caused by the attenuation of the laser energy in the fog cone is designed, which improves the speed and accuracy of the optical measurement of the fuel distribution.

本发明解决其技术问题所采用的技术方案:一种燃油喷嘴液滴空间分布光学测量方法,所述燃油喷嘴喷射的燃油在其正下方形成雾锥,所述燃油中含有示踪组分,其特征在于,所述测量方法包括,The technical solution adopted by the present invention to solve the technical problem: an optical measurement method for the spatial distribution of fuel nozzle droplets, wherein the fuel injected by the fuel nozzle forms a mist cone directly below it, and the fuel contains tracer components, which It is characterized in that the measuring method comprises,

--在所述燃油喷嘴的正下方一定距离处投射一激光片光源,所述片光源垂直于所述雾锥的中心轴,所述雾锥在片光源的空间位置处的横截面构成一雾锥周向测试平面,或,所述片光源平行于所述雾锥的中心轴,所述雾锥在片光源的空间位置处的截面构成一雾锥轴向测试平面;--Project a laser sheet light source at a certain distance directly below the fuel nozzle, the sheet light source is perpendicular to the central axis of the fog cone, and the cross section of the fog cone at the spatial position of the sheet light source forms a fog Cone circumferential test plane, or, the sheet light source is parallel to the central axis of the fog cone, and the section of the fog cone at the spatial position of the sheet light source constitutes a fog cone axial test plane;

--当所述片光源垂直于所述雾锥的中心轴布置时,在所述雾锥周向测试平面的侧下方或侧上方布置一图像采集装置,并与所述雾锥周向测试平面成一定角度,所述图像采集装置采集所述雾锥周向测试平面中的燃油分布图像;当所述片光源平行于所述雾锥的中心轴布置时,垂直于所述轴向测试平面布置一图像采集装置,采集所述雾锥轴向测试截面的真实燃油分布图像;--When the sheet light source is arranged perpendicular to the central axis of the fog cone, an image acquisition device is arranged below or above the side of the fog cone circumferential test plane, and is connected to the fog cone circumferential test plane At a certain angle, the image acquisition device collects the fuel distribution image in the circumferential test plane of the fog cone; when the sheet light source is arranged parallel to the central axis of the fog cone, it is arranged perpendicular to the axial test plane An image acquisition device, which collects the real fuel oil distribution image of the axial test section of the fog cone;

--所述图像采集装置的镜头前布置一滤光片,所述滤光片用以分离散射信号和荧光信号,使所述图像采集装置只采集荧光信号;--A filter is arranged in front of the lens of the image acquisition device, and the filter is used to separate the scattering signal and the fluorescence signal, so that the image acquisition device only collects the fluorescence signal;

--当所述片光源垂直于所述雾锥的中心轴布置时,对燃油空间分布测量进行误差校正,校正因激光强度在雾锥的衰减给燃油分布质量测量所产生的误差,同时校正由于所述图像采集装置拍摄位置引起的雾锥周向测试平面中局部光程不同所产生的测量误差:完成一次测量后,保持图像采集装置和试验状态参数保持不变,将所述燃油喷嘴旋转180°进行第二次测量,将第二次测量得到的图像再以燃油喷嘴中心为原点旋转180°,并与第一次测量得到的图像合成为一张图像;--When the sheet light source is arranged perpendicular to the central axis of the fog cone, error correction is performed on the measurement of the spatial distribution of the fuel, and the error caused by the attenuation of the laser intensity in the fog cone to the measurement of the fuel distribution quality is corrected. The measurement error caused by the different local optical paths in the fog cone circumferential test plane caused by the shooting position of the image acquisition device: after a measurement is completed, keep the image acquisition device and the test state parameters unchanged, and rotate the fuel nozzle 180 ° Carry out the second measurement, rotate the image obtained by the second measurement by 180° with the center of the fuel nozzle as the origin, and combine it with the image obtained by the first measurement to form an image;

--分析图像,确定液滴的空间分布情况。-- Analyze the image to determine the spatial distribution of the droplets.

优选地,所述燃油采用国产RP-3航空煤油为工质,采用其它燃料为工质时需要添加示踪剂。Preferably, domestic RP-3 aviation kerosene is used as the working fluid for the fuel, and a tracer needs to be added when other fuels are used as the working fluid.

优选地,所述图像采集装置为增强型CCD相机。优选地,所述增强型CCD相机包括依次连接的紫外镜头、图像增强器、CCD相机。进一步优选地,设置时间同步控制器同时向所述图像增强器和CCD相机发射TTL信号,控制所述图像增强器和CCD相机的快门打开时间。Preferably, the image acquisition device is an enhanced CCD camera. Preferably, the enhanced CCD camera includes an ultraviolet lens, an image intensifier, and a CCD camera connected in sequence. Further preferably, a time synchronization controller is set to simultaneously transmit TTL signals to the image intensifier and the CCD camera to control the shutter opening time of the image intensifier and the CCD camera.

优选地,所述激光为波长为266nm的激发光。进一步优选地,所述片光源由YAG激光器发出的激光束通过激光导光臂进入片光源成型光学元件而形成,所述片光源的厚度约为1mm。Preferably, the laser is excitation light with a wavelength of 266nm. Further preferably, the sheet light source is formed by a laser beam emitted by a YAG laser entering the sheet light source forming optical element through a laser light guide arm, and the thickness of the sheet light source is about 1 mm.

优选地,当所述片光源垂直于所述雾锥的中心轴布置时,所述CCD相机采集到的所述雾锥周向测试平面中的燃油分布图像存在几何变形,通过图像几何校正得到所述雾锥周向测试平面的真实图像。Preferably, when the sheet light source is arranged perpendicular to the central axis of the fog cone, the fuel distribution image in the fog cone circumferential test plane collected by the CCD camera is geometrically deformed, and the resulting image is obtained by geometric correction of the image. A realistic image of the test plane around the fog cone perimeter.

优选地,当所述片光源垂直于所述雾锥的中心轴布置时,所述CCD相机与所述雾锥周向测试平面成30-60度夹角。Preferably, when the sheet light source is arranged perpendicular to the central axis of the fog cone, the CCD camera forms an included angle of 30-60 degrees with the fog cone circumferential test plane.

优选地,当所述片光源垂直于或平行于所述雾锥的中心轴布置时,需要进行背景校正,消除周围环境中的可见光对燃油空间分布测量的影响。Preferably, when the sheet light source is arranged perpendicular to or parallel to the central axis of the fog cone, background correction is required to eliminate the influence of visible light in the surrounding environment on the measurement of fuel spatial distribution.

在国内首次实现了RP-3航空煤油-激光诱导荧光用于燃油喷嘴空间分布测量,并设计燃油分布测量误差校正方案,提高了测量精度。利用航空煤油中的芳香族化合物在紫外光照射下,芳香族化合物跃迁到激发态,随后衰减发出发生红移的荧光信号。设计了光学测量试验装置,片光源垂直于雾锥中心轴,相机位于测试平面的测下方,结合滤光片分离散射信号和荧光信号,使增强型CCD相机只采集荧光信号。在不同的相机门宽下,确定了最佳的激光器激光发射和相机快门打开的时间延迟dt,使荧光信号产生的时间段在相机的门宽时间段之内,能保证采集到清晰的荧光信号图像。通过几何尺寸校正相机采集的几何变形的雾锥横截面图像,得到真实的雾锥横截面图像。通过在雾锥两侧分别入射激光进行两次测量,然后把第二次测量得到的图像旋转180°与第一次测量得到的图像合并,消除激光能量在雾锥中衰减引起的测量误差。For the first time in China, RP-3 aviation kerosene-laser-induced fluorescence was used to measure the spatial distribution of fuel nozzles, and a fuel distribution measurement error correction scheme was designed to improve the measurement accuracy. Using the aromatic compounds in aviation kerosene under the irradiation of ultraviolet light, the aromatic compounds transition to the excited state, and then decay to emit a red-shifted fluorescence signal. The optical measurement test device is designed, the light source is perpendicular to the central axis of the fog cone, the camera is located under the test plane, and the scattering signal and the fluorescence signal are separated by the filter, so that the enhanced CCD camera only collects the fluorescence signal. Under different camera gate widths, the optimal time delay dt between laser emission and camera shutter opening is determined, so that the time period of fluorescence signal generation is within the time period of the camera gate width, which can ensure the collection of clear fluorescence signals image. The geometrically deformed fog cone cross-sectional image collected by the geometric size correction camera is used to obtain the real fog cone cross-sectional image. The measurement error caused by the attenuation of laser energy in the fog cone is eliminated by injecting the laser light on both sides of the fog cone for two measurements, and then rotating the image obtained by the second measurement by 180° with the image obtained by the first measurement.

根据本发明的一方面,还提供了一种燃油分布光学测量的试验装置,包括燃油喷嘴、片光源形成装置、图像采集装置,其特征在于,所述燃油喷嘴喷射的燃油在其正下方形成雾锥,所述片光源形成装置在所述燃油喷嘴的正下方投射一片光源,所述片光源垂直于所述雾锥的中心轴,所述雾锥在片光源的空间位置处的横截面构成一雾锥周向测试平面,或,所述片光源平行于所述雾锥的中心轴,所述雾锥在片光源的空间位置处的截面构成一雾锥轴向测试平面;当所述片光源垂直于所述雾锥的中心轴布置时,在所述雾锥周向测试平面的侧下方或侧上方布置一图像采集装置,并与所述雾锥周向测试平面成一定角度;当所述片光源平行于所述雾锥的中心轴布置时,垂直于所述轴向测试平面布置一图像采集装置;所述图像采集装置的镜头前布置一滤光片;所述试验装置还包括相互通信连接的控制装置和时间同步控制器,所述时间同步控制器通信连接所述片光源形成装置和图像采集装置。According to one aspect of the present invention, there is also provided a test device for optical measurement of fuel distribution, including a fuel nozzle, a sheet light source forming device, and an image acquisition device, and it is characterized in that the fuel injected by the fuel nozzle forms mist right below it Cone, the sheet light source forming device projects a sheet of light source directly below the fuel nozzle, the sheet light source is perpendicular to the central axis of the fog cone, and the cross section of the fog cone at the spatial position of the sheet light source forms a Fog cone circumferential test plane, or, described sheet light source is parallel to the central axis of described fog cone, and the section of described fog cone at the spatial position of sheet light source constitutes a fog cone axial test plane; When described sheet light source When arranged perpendicular to the central axis of the fog cone, an image acquisition device is arranged below or above the side of the fog cone circumferential test plane, and forms a certain angle with the fog cone circumferential test plane; when the When the sheet light source is arranged parallel to the central axis of the fog cone, an image acquisition device is arranged perpendicular to the axial test plane; a filter is arranged in front of the lens of the image acquisition device; the test device also includes mutual communication A connected control device and a time synchronization controller, the time synchronization controller is communicatively connected to the sheet light source forming device and the image acquisition device.

优选地,所述图像采集装置为增强型CCD相机,包括依次连接的滤光片、紫外镜头、图像增强器、CCD相机,所述时间同步控制器同时与所述图像增强器和CCD相机通信连接。Preferably, the image acquisition device is an enhanced CCD camera, comprising sequentially connected optical filters, an ultraviolet lens, an image intensifier, and a CCD camera, and the time synchronization controller is communicatively connected with the image intensifier and the CCD camera simultaneously .

所述片光源形成装置包括依次连接的YAG激光器、激光导光臂、片光源成型光学元件。The sheet light source forming device includes a YAG laser, a laser light guide arm, and a sheet light source forming optical element connected in sequence.

所述控制装置为PC机。The control device is a PC.

根据本发明的一方面,提供了一种燃油喷嘴雾锥中燃油或液滴空间分布测量的光学测量方法,其特征在于,基于国产RP-3航空煤油,利用燃油中的荧光组分,结合燃油的激光诱导荧光技术实现燃油喷嘴雾锥中燃油空间分布测量的光学测量方法。航空煤油中的芳香族化合物在紫外光激发下进入激发态,随后由激发态衰减发出红移的荧光信号,采用光学滤波片把激发光在液滴表面的散射信号和荧光信号分离,只让荧光信号通过滤光片,采用增强型CCD相机采集荧光信号。According to one aspect of the present invention, an optical measurement method for measuring the spatial distribution of fuel or liquid droplets in the mist cone of a fuel nozzle is provided, which is characterized in that, based on domestic RP-3 aviation kerosene, the fluorescent components in the fuel are used, combined with the An optical measurement method for the measurement of the spatial distribution of fuel in fuel nozzle fog cones using laser-induced fluorescence technology. The aromatic compounds in aviation kerosene enter the excited state under the excitation of ultraviolet light, and then the excited state decays to emit a red-shifted fluorescence signal. Optical filters are used to separate the scattering signal of the excitation light on the droplet surface from the fluorescence signal, and only the fluorescence The signal passes through a filter, and the fluorescent signal is collected by an enhanced CCD camera.

优选的,采用波长为266nm的光源为激发光。Preferably, a light source with a wavelength of 266nm is used as the excitation light.

优选的,本发明中采用国产RP-3航空煤油为工质,采用其它燃料为工质时需要添加示踪剂。Preferably, domestic RP-3 aviation kerosene is used as the working medium in the present invention, and a tracer needs to be added when other fuels are used as the working medium.

优选的,所述光学滤波片采用长通滤波片实现散射信号和荧光信号的分离,实验环境在暗室中进行,避免周围环境中可见光对光学测量的影响。Preferably, the optical filter uses a long-pass filter to separate the scattering signal and the fluorescent signal, and the experiment environment is carried out in a dark room to avoid the influence of visible light in the surrounding environment on the optical measurement.

根据本发明的另一方面,提供了一种燃油分布光学测量的试验方案,所述试验方案包括光学元件的布置和试验件的布置。本试验方案中片光源垂直于试验件轴向时,相机位于测试平面的侧下方或侧上方,得到燃油喷嘴雾锥周向截面中的燃油分布,直接采集到的图像存在几何变形,通过图像几何校正得到雾锥横截面的真实图像。当片光源平行于试验件轴向时,相机垂直于测试平面,能得到雾锥轴向截面的真实燃油分布图像。在两种燃油分布测量方案中,都需要背景校正,以消除周围环境中的可见光对燃油空间分布测量的影响。According to another aspect of the present invention, a test scheme for optical measurement of fuel distribution is provided, the test scheme includes the arrangement of optical elements and the arrangement of test pieces. In this test scheme, when the sheet light source is perpendicular to the axial direction of the test piece, and the camera is located below or above the side of the test plane, the fuel distribution in the circumferential section of the fuel nozzle mist cone is obtained. The directly collected image has geometric deformation. The correction yields a true image of the fog cone cross-section. When the sheet light source is parallel to the axial direction of the test piece, the camera is perpendicular to the test plane, and the real fuel distribution image of the axial section of the fog cone can be obtained. In both fuel distribution measurement schemes, background correction is required to eliminate the influence of visible light in the surrounding environment on the fuel spatial distribution measurement.

优选的,本试验方案中片光源垂直于试验件轴向,相机位于测试平面的侧下方,于测试平面成30-60度。Preferably, in this test plan, the sheet light source is perpendicular to the axial direction of the test piece, and the camera is located below the side of the test plane, at an angle of 30-60 degrees to the test plane.

优选的,本试验装置中,图像增强器的门宽为100ns。Preferably, in this test device, the gate width of the image intensifier is 100 ns.

根据本发明的另外一方面,提供了一种燃油空间分布测量误差校正方法。为校正激光强度在雾锥的衰减给燃油分布质量测量所产生的误差,采取了把喷嘴在同一位置旋转180°的方法(见图3)。在一次测量完成后,图像采集和试验状态参数都保持不变,把喷嘴旋转180°进行第二次测量。喷嘴旋转180°后得到的图像再以喷嘴中心为原点旋转180°,这样两次测量CCD相机得到的图像是同一个雾锥横截面,采集的图像见图3。两次测量时,激光分别位于喷嘴的两侧B和D,两次的测量结果使用图像处理软件合成为一张图像。这时,激光在雾锥横截面中的衰减通过分别从喷嘴的两侧射入激光而抵消。另外,两次测量时相机分别位于喷嘴的A侧下方和C侧下方,此方法可以校正由于相机拍摄位置引起的雾锥横截面中局部光程不同所产生的测量误差。According to another aspect of the present invention, a method for correcting errors in fuel spatial distribution measurement is provided. In order to correct the error caused by the attenuation of the laser intensity in the fog cone to the measurement of the fuel distribution quality, the method of rotating the nozzle by 180° at the same position is adopted (see Figure 3). After one measurement is completed, the image acquisition and test state parameters remain unchanged, and the nozzle is rotated 180° for the second measurement. The image obtained after the nozzle is rotated 180° is then rotated 180° with the center of the nozzle as the origin, so that the images obtained by the two measurements of the CCD camera are the same fog cone cross-section, and the collected images are shown in Figure 3. During the two measurements, the laser is located on both sides B and D of the nozzle respectively, and the two measurement results are synthesized into one image using image processing software. At this time, the attenuation of the laser light in the cross-section of the fog cone is counteracted by injecting the laser light from both sides of the nozzle respectively. In addition, the cameras were located under the A-side and C-side of the nozzle during the two measurements. This method can correct the measurement error caused by the difference in the local optical path in the fog cone cross-section caused by the camera shooting position.

本发明的特点是采用非介入式光学测量方法不影响流场,采用燃油激光诱导荧光方法进行燃油分布测量可以快速、准确的测量雾锥中不同截面内的燃油空间分布,相对于平面激光散射和基于单点测量的相位多普勒粒子分析仪,平面激光诱导荧光方法提高了测量速度和精度。本发明中的燃油误差校正方法进一步解决了平面激光诱导荧光方法在液滴浓度较大的雾锥中存在的激光能量衰减问题,扩宽了燃油激光诱导荧光方法的应用范围。The feature of the present invention is that the non-interventional optical measurement method does not affect the flow field, and the fuel oil distribution measurement using the fuel laser-induced fluorescence method can quickly and accurately measure the fuel oil spatial distribution in different sections of the fog cone. Compared with the plane laser scattering and Phase Doppler particle analyzer based on single-point measurement, planar laser-induced fluorescence method improves measurement speed and accuracy. The fuel oil error correction method in the present invention further solves the laser energy attenuation problem of the planar laser-induced fluorescence method in fog cones with high droplet concentration, and broadens the application range of the fuel laser-induced fluorescence method.

本发明的原理:根据Baranger等人的研究,航空煤油中的某些芳香族化合物(1,2,4-三甲基苯、萘、1-甲基萘和1,3-二甲基萘等)在紫外光的照射下能够发出荧光。如图2所示,片光源的厚度为h,和片光源相交的雾锥是测试区,测试区中面积为δA某一小块的体积为δV=h·δA,从体积为δV的测试区中发出的荧光光子数是和曝光时间、片光强度和测试区中荧光组分的分子数成正比的,假设荧光组分浓度在煤油中是均一的,则发出的光子数和δV的测试区中航空煤油的质量成正比。相机曝光时间(τ)一定,假设片光强度在整个测试区中是均一的,则体积为δV的测试区中的荧光信号强度和此局部的煤油质量成正比。Principle of the present invention: According to the research of Baranger et al., certain aromatic compounds (1,2,4-trimethylbenzene, naphthalene, 1-methylnaphthalene and 1,3-dimethylnaphthalene, etc.) in aviation kerosene ) can fluoresce under the irradiation of ultraviolet light. As shown in Figure 2, the thickness of the sheet light source is h, and the fog cone intersecting the sheet light source is the test area. In the test area, the volume of a small block with an area of δA is δV=h·δA. From the test area with a volume of δV The number of fluorescent photons emitted in is proportional to the exposure time, light intensity and the number of molecules of fluorescent components in the test area. Assuming that the concentration of fluorescent components is uniform in kerosene, the number of photons emitted and the test area of δV In direct proportion to the quality of aviation kerosene. The camera exposure time (τ) is fixed, assuming that the slice light intensity is uniform in the entire test area, the fluorescence signal intensity in the test area with a volume of δV is proportional to the local kerosene mass.

本发明与现有技术相比所具有的优点:Compared with the prior art, the present invention has the following advantages:

(1)本发明采用非介入式光学测量方法,不干扰流场。(1) The present invention adopts a non-invasive optical measurement method without disturbing the flow field.

(2)相对于介入式的燃油收集法和基于单点测量的激光多普勒粒子分析仪,本发明可以进行燃油分布瞬态特性的测量,提高了测量的时间分辨率。(2) Compared with the interventional fuel collection method and the laser Doppler particle analyzer based on single-point measurement, the present invention can measure the transient characteristics of fuel distribution and improve the time resolution of the measurement.

(3)燃油空间分布误差校正方法解决了激光能量在雾锥中衰减引起的测量误差,提高了激光诱导荧光燃油空间分布测量精度,同时,使燃油激光荧光燃油分布测量方法能用于液滴浓度较大的雾锥中,扩宽了激光诱导荧光方法在燃油空间分布测量中的应用范围。(3) The fuel oil spatial distribution error correction method solves the measurement error caused by the attenuation of laser energy in the fog cone, improves the measurement accuracy of laser-induced fluorescence fuel spatial distribution, and at the same time, enables the fuel laser fluorescence fuel distribution measurement method to be used for droplet concentration In larger fog cones, the application range of laser-induced fluorescence method in the measurement of fuel spatial distribution is broadened.

附图说明Description of drawings

图1是燃油喷嘴雾锥及横截面;Figure 1 is the mist cone and cross section of the fuel nozzle;

图2是本发明的燃油空间分布测试光学元件及试验件布置图;Fig. 2 is the layout diagram of the optical element and the test piece of the fuel oil space distribution test of the present invention;

图3是本发明的燃油空间分布测量误差校正方案示意图。Fig. 3 is a schematic diagram of the error correction scheme of the fuel spatial distribution measurement of the present invention.

其中1是PC机,2是YAG激光器,3是激光导光臂,4是片光源成型光学元件,5是燃油喷嘴,6是测试区,7是燃油喷嘴雾锥,8是滤光片,9是紫外相机镜头,10是图像增强器,11是CCD相机,12是时间同步控制器,13是第一次燃油分布测量雾锥横截面位置,14是第一次燃油分布测量激光束及发射方向,15是第二次燃油分布测量雾锥横截面位置,16是第二次燃油分布测量激光束及发射方向,17是第二次燃油分布测量雾锥横截面旋转180°后的位置,18是第一次燃油分布测量雾锥横截面图像,19是第二次燃油分布测量雾锥横截面图像,20是第二次燃油分布测量雾锥横截面旋转180°后的图像,21是18和20合并后的雾锥横截面燃油分布图像。Among them, 1 is the PC, 2 is the YAG laser, 3 is the laser light guide arm, 4 is the sheet light source forming optical element, 5 is the fuel nozzle, 6 is the test area, 7 is the fog cone of the fuel nozzle, 8 is the filter, 9 is the ultraviolet camera lens, 10 is the image intensifier, 11 is the CCD camera, 12 is the time synchronization controller, 13 is the cross section position of the fog cone for the first fuel distribution measurement, 14 is the laser beam and the emission direction of the first fuel distribution measurement , 15 is the position of the cross-section of the fog cone for the second fuel distribution measurement, 16 is the laser beam and the emission direction for the second fuel distribution measurement, 17 is the position of the fog cone cross-section rotated by 180° for the second fuel distribution measurement, and 18 is The first fuel distribution measurement fog cone cross-sectional image, 19 is the second fuel distribution measurement fog cone cross-sectional image, 20 is the second fuel distribution measurement fog cone cross-section rotated 180° image, 21 is 18 and 20 Merged image of fuel distribution in the cross-section of the fog cone.

具体实施方式Detailed ways

为使本发明的目的、技术方案及优点更加清楚明白,以下参照附图并举实施例,对发明进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and examples.

图2是本发明的燃油空间分布测试光学元件及试验件布置图,整个光学测量系统通过PC机1进行数据采集、控制和数据处理的。PC机1向时间同步控制器12发射TTL激发信号,YAG激光器2开始工作,发出的激光束通过激光导光臂3进入片光源成型光学元件4,形成厚度约为1mm的片光,片光源通过测试区6。燃油喷嘴5喷射的燃油形成雾锥7,雾锥7中的示踪剂在片光源的激发下进入激发态,随后发出荧光。荧光信号和散射信号通过滤光片8实现分离,只有荧光信号可以通过紫外镜头9。在时间同步控制器12向YAG激光器发射TTL信号的一定时间dt后,时间同步控制器12同时向图像增强器10和CCD相机11发射TTL信号,使图像增强器10和CCD相机11的快门打开,让荧光信号进入图像增强器10,荧光信号经图像增强器10进行放大,然后进入CCD相机11,保证CCD相机采集到清楚的强度相对较弱的激光诱导荧光信号。FIG. 2 is a layout diagram of the optical components and test pieces for the fuel spatial distribution test of the present invention, and the entire optical measurement system performs data collection, control and data processing through the PC 1 . The PC 1 sends a TTL excitation signal to the time synchronization controller 12, and the YAG laser 2 starts to work, and the emitted laser beam enters the sheet light source forming optical element 4 through the laser light guide arm 3 to form a sheet light with a thickness of about 1mm, and the sheet light source passes through the Test area 6. The fuel injected by the fuel nozzle 5 forms a mist cone 7, and the tracer in the mist cone 7 enters an excited state under the excitation of the sheet light source, and then emits fluorescence. The fluorescence signal and the scattering signal are separated through the optical filter 8, and only the fluorescence signal can pass through the ultraviolet lens 9. After time synchronization controller 12 transmits TTL signal certain time dt to YAG laser, time synchronization controller 12 transmits TTL signal to image intensifier 10 and CCD camera 11 simultaneously, makes the shutter of image intensifier 10 and CCD camera 11 open, Let the fluorescence signal enter the image intensifier 10, the fluorescence signal is amplified by the image intensifier 10, and then enter the CCD camera 11, so as to ensure that the CCD camera collects a clear and relatively weak laser-induced fluorescence signal.

图3是本发明的燃油空间分布测量误差校正方案示意图。首先进行第一次燃油分布测量,激光14从雾锥横截面13的B侧通过雾锥,通过图像采集得到燃油分布图像18。然后进行第二次燃油分布测量,把喷嘴位置旋转180°,保持激光发射方向不变,即雾锥横截面13变成雾锥横截面15,激光16从雾锥横截面的D侧通过雾锥,通过图像采集得到燃油分布图像19。最后进行图像后处理,首先把19旋转180°,得到燃油分布图像20。这时,燃油分布图像20相对于第一次测量的燃油分布图像18,就是分别从喷嘴截面13两侧B和D分别进行一次燃油分布测量。把第一次测量的燃油分布图像18和第二次测量并旋转180°的燃油分布图像合并,则去除激光能量在雾锥中衰减引起的测量误差,得到测量精度更高的燃油分布图像21。Fig. 3 is a schematic diagram of the error correction scheme of the fuel spatial distribution measurement of the present invention. Firstly, the first fuel distribution measurement is carried out. The laser 14 passes through the fog cone from the side B of the fog cone cross-section 13, and the fuel distribution image 18 is obtained through image acquisition. Then carry out the second fuel distribution measurement, rotate the nozzle position by 180°, keep the laser emission direction unchanged, that is, the fog cone cross section 13 becomes the fog cone cross section 15, and the laser 16 passes through the fog cone from the D side of the fog cone cross section , the fuel distribution image 19 is obtained through image acquisition. Finally, the post-processing of the image is performed. Firstly, 19 is rotated by 180° to obtain the fuel distribution image 20 . At this time, the fuel distribution image 20 is compared with the fuel distribution image 18 measured for the first time, that is, a fuel distribution measurement is performed from both sides B and D of the nozzle section 13 respectively. Combining the first measured fuel distribution image 18 with the second measured and rotated 180° fuel distribution image will remove the measurement error caused by laser energy attenuation in the fog cone, and obtain a fuel distribution image 21 with higher measurement accuracy.

此外,需要说明的是,本说明书中所描述的具体实施例,其零、部件的形状、所取名称等可以不同。凡依本发明专利构思所述的构造、特征及原理所做的等效或简单变化,均包括于本发明专利的保护范围内。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代,只要不偏离本发明的结构或者超越本权利要求书所定义的范围,均应属于本发明的保护范围。In addition, it should be noted that the specific embodiments described in this specification may be different in terms of parts, shapes and names of components. All equivalent or simple changes made according to the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in the claims. All should belong to the protection scope of the present invention.

Claims (10)

1. a fuel nozzle drop space distribution measuring method, the fuel oil that described fuel nozzle sprays forms mist cone under it, contains spike component in described fuel oil, it is characterized in that, and described measuring method comprises,
--under described fuel nozzle, a distance projects a laser light sheet, described sheet laser is perpendicular to the central shaft of described mist cone, the xsect of described mist cone at the place, locus of sheet laser forms circumferentially test plane of a mist cone, or, described sheet laser is parallel to the central shaft of described mist cone, and the section constitution one mist axis of cone that described mist cone is located in the locus of sheet laser is to test plane;
--when described sheet laser is arranged perpendicular to the central shaft of described mist cone, at described mist cone, circumferentially above the side-lower of test plane or side, arrange an image collecting device, and circumferentially test plane is angled with described mist cone, described image collecting device gathers the fuel distribution image in the circumferential test of described mist cone plane; When described sheet laser is parallel to the central shaft layout of described mist cone, perpendicular to described axial test floor plan one image collecting device, gather the described mist axis of cone to the true fuel distribution image of testing section;
--before the camera lens of described image collecting device, arrange an optical filter, described optical filter, in order to separated scattered signal and fluorescence signal, makes described image collecting device only gather fluorescence signal;
--when described sheet laser is arranged perpendicular to the central shaft of described mist cone, fuel space distribution measuring is carried out to error correction, correction is because of the decay error that to fuel distribution mass measurement produce of laser intensity at mist cone, proofread and correct the mist cone causing due to described image collecting device camera site simultaneously and circumferentially test the measuring error that in plane, local light path difference produces: complete after one-shot measurement, keep image collecting device and trystate parameter to remain unchanged, described fuel nozzle Rotate 180 ° is measured for the second time, the image measuring for the second time be take to fuel nozzle center again as initial point Rotate 180 °, and synthesize an image with the image measuring for the first time,
--analysis image, determine the space distribution situation of drop.
2. fuel nozzle drop space distribution measuring method according to claim 1, it is characterized in that, described method utilizes the aromatics in domestic RP-3 aviation kerosene can emitting fluorescence under ultraviolet excitation, stating ultraviolet wavelength is 266nm, the wavelength coverage 280-360nm of fluorescence signal.
3. fuel nozzle drop space distribution measuring method according to claim 1, is characterized in that, described method can realize the circumferential distribution measuring of fuel nozzle lateral cross section fuel oil.
4. fuel nozzle drop space distribution measuring method according to claim 1, is characterized in that, the time delay intervals that laser device laser transmitting and camera shutter are opened is 390-450ns.
5. fuel nozzle drop space distribution measuring method according to claim 1, it is characterized in that, by in mist cone both sides respectively incident laser carry out twice measurement, then 180 ° of the image rotations measuring are for the second time merged with the image measuring for the first time, eliminate the laser energy measuring error that decay causes in mist cone.
6. fuel nozzle drop space distribution measuring method according to claim 1, is characterized in that, described image collector is set to enhancement mode CCD camera.Preferably, described enhancement mode CCD camera comprises ultraviolet lens, image intensifier, the CCD camera connecting successively.Further preferably, setup times isochronous controller, simultaneously to described image intensifier and CCD camera transmitting TTL signal, is controlled the shutter opening time of described image intensifier and CCD camera.
7. fuel nozzle drop space distribution measuring method according to claim 1, it is characterized in that, the laser beam that described sheet laser is sent by YAG laser instrument enters sheet laser moulding optical element by laser guide arm and forms, and the thickness of described sheet laser is about 1mm.
8. fuel nozzle drop space distribution measuring method according to claim 1, is characterized in that, when described sheet laser is arranged perpendicular to the central shaft of described mist cone, described CCD camera is circumferentially tested plane with described mist cone and become 30-60 degree angle.
9. fuel nozzle drop space distribution measuring method according to claim 1, it is characterized in that, when described sheet laser perpendicular to or the central shaft that is parallel to described mist cone while arranging, need to carry out background correction, eliminate the impact on fuel space distribution measuring of visible ray in surrounding environment.
10. one kind in order to implement the test unit of the fuel distribution optical measurement of measuring method described in the claims, comprise fuel nozzle, sheet laser forms device, image collecting device, it is characterized in that, the fuel oil that described fuel nozzle sprays forms mist cone under it, described sheet laser forms device and under described fuel nozzle, projects a sheet laser, described sheet laser is perpendicular to the central shaft of described mist cone, the xsect of described mist cone at the place, locus of sheet laser forms circumferentially test plane of a mist cone, or, described sheet laser is parallel to the central shaft of described mist cone, the section constitution one mist axis of cone that described mist cone is located in the locus of sheet laser is to test plane, when described sheet laser is arranged perpendicular to the central shaft of described mist cone, at described mist cone, circumferentially above the side-lower of test plane or side, arrange an image collecting device, and circumferentially test plane is angled with described mist cone, when described sheet laser is parallel to the central shaft layout of described mist cone, perpendicular to described axial test floor plan one image collecting device, before the camera lens of described image collecting device, arrange an optical filter, described test unit also comprises control device and the time synchronized controller of mutual communication connection, and described time synchronized controller communicates to connect described sheet laser and forms device and image collecting device.
CN201410016338.6A 2014-01-14 2014-01-14 Optical measuring method and device for spatial distribution of liquid droplets of fuel nozzle Pending CN103760142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410016338.6A CN103760142A (en) 2014-01-14 2014-01-14 Optical measuring method and device for spatial distribution of liquid droplets of fuel nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410016338.6A CN103760142A (en) 2014-01-14 2014-01-14 Optical measuring method and device for spatial distribution of liquid droplets of fuel nozzle

Publications (1)

Publication Number Publication Date
CN103760142A true CN103760142A (en) 2014-04-30

Family

ID=50527417

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410016338.6A Pending CN103760142A (en) 2014-01-14 2014-01-14 Optical measuring method and device for spatial distribution of liquid droplets of fuel nozzle

Country Status (1)

Country Link
CN (1) CN103760142A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104142607A (en) * 2014-07-28 2014-11-12 天津大学 Light condensing device used for high-speed camera in microscopic shooting process of nozzle spraying form
CN104568406A (en) * 2014-12-26 2015-04-29 中国航天科技集团公司第六研究院第十一研究所 Device for measuring non-uniform coefficient of spray
CN106768946A (en) * 2016-12-21 2017-05-31 成都航利航空科技有限责任公司 A kind of fuel nozzle radial distribution comprehensive measurement device
CN107449697A (en) * 2017-08-01 2017-12-08 昆明理工大学 A kind of laser testing device and method of the fuel-flooded atomizing particle dispersing characteristic based on fluorescent tracing
CN107976384A (en) * 2017-10-20 2018-05-01 浙江大学 One-wavelength laser induces incandescence nano-scale carbon soot calipers and method
CN108443001A (en) * 2018-02-10 2018-08-24 江苏大学 A kind of ammonia concentration distribution tester
CN109557062A (en) * 2018-12-10 2019-04-02 徐州工程学院 A kind of desulfurization wastewater drop evaporation test device and test method
CN109781420A (en) * 2019-03-06 2019-05-21 中北大学 An experimental device for visualizing high-pressure tumble air intake of an engine
CN110361185A (en) * 2019-08-20 2019-10-22 楼蓝科技(苏州)有限公司 A kind of optical measuring device for gas turbine fuel nozzle
CN110672041A (en) * 2019-10-15 2020-01-10 成都飞机工业(集团)有限责任公司 An experimental device for measuring fog cone angle based on image
CN110823758A (en) * 2019-10-29 2020-02-21 西安交通大学 Observation device for powder density distribution and image processing and nozzle optimization method
CN110907420A (en) * 2019-12-04 2020-03-24 中国科学院过程工程研究所 A kind of measuring device for the equilibrium time of mass transfer between immiscible solution and liquid phase and measuring method using the same
CN111650171A (en) * 2020-07-03 2020-09-11 中国科学院工程热物理研究所 Quantitative measurement and calibration method of high temperature and high pressure fuel concentration field of fuel nozzle
CN111735744A (en) * 2020-04-24 2020-10-02 昆明理工大学 A method for evaluating the spatial distribution of nozzle atomization
CN114993895A (en) * 2022-05-31 2022-09-02 江苏大学 Test device and method for synchronously measuring spray far-field droplet particle size and droplet instantaneous velocity distribution
CN118794646A (en) * 2024-09-12 2024-10-18 中国航空工业集团公司沈阳空气动力研究所 A particle tracing system and diagnostic test method based on Ludwig tube wind tunnel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040090622A1 (en) * 2001-05-03 2004-05-13 Nielsen Hans Ole Apparatus and sensing devices for measuring fluorescence lifetimes of fluorescence sensors
JP2006052991A (en) * 2004-08-10 2006-02-23 Masaji Katsuki Vapor concentration measurement method
CN103278322A (en) * 2013-06-18 2013-09-04 无锡市石油化工设备有限公司 Jet nozzle liquid flow distribution measuring device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040090622A1 (en) * 2001-05-03 2004-05-13 Nielsen Hans Ole Apparatus and sensing devices for measuring fluorescence lifetimes of fluorescence sensors
JP2006052991A (en) * 2004-08-10 2006-02-23 Masaji Katsuki Vapor concentration measurement method
CN103278322A (en) * 2013-06-18 2013-09-04 无锡市石油化工设备有限公司 Jet nozzle liquid flow distribution measuring device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
刘存喜: "多级旋流空气雾化喷嘴雾化特性及光学测试方法研究", 《中国博士学位论文全文数据库 工程科技II辑》, no. 11, 15 November 2013 (2013-11-15) *
刘存喜等: "某型航空发动机用离心喷嘴燃油空间分布特性试验", 《航空动力学报》, vol. 28, no. 4, 30 April 2013 (2013-04-30) *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104142607A (en) * 2014-07-28 2014-11-12 天津大学 Light condensing device used for high-speed camera in microscopic shooting process of nozzle spraying form
CN104142607B (en) * 2014-07-28 2016-08-17 天津大学 Beam condensing unit for high-speed camera microscopic photography nozzle spray form
CN104568406A (en) * 2014-12-26 2015-04-29 中国航天科技集团公司第六研究院第十一研究所 Device for measuring non-uniform coefficient of spray
CN104568406B (en) * 2014-12-26 2017-06-06 中国航天科技集团公司第六研究院第十一研究所 Spraying nonuniformity coefficient measurement apparatus
CN106768946A (en) * 2016-12-21 2017-05-31 成都航利航空科技有限责任公司 A kind of fuel nozzle radial distribution comprehensive measurement device
CN106768946B (en) * 2016-12-21 2023-06-23 成都航利航空科技有限责任公司 Comprehensive measuring device for radial distribution of fuel nozzle
CN107449697A (en) * 2017-08-01 2017-12-08 昆明理工大学 A kind of laser testing device and method of the fuel-flooded atomizing particle dispersing characteristic based on fluorescent tracing
CN107976384A (en) * 2017-10-20 2018-05-01 浙江大学 One-wavelength laser induces incandescence nano-scale carbon soot calipers and method
CN107976384B (en) * 2017-10-20 2019-07-09 浙江大学 Monochromatic laser-induced incandescent light nanoscale soot particle size measurement device and method
CN108443001A (en) * 2018-02-10 2018-08-24 江苏大学 A kind of ammonia concentration distribution tester
CN108443001B (en) * 2018-02-10 2020-02-21 江苏大学 A kind of ammonia concentration distribution test device
CN109557062A (en) * 2018-12-10 2019-04-02 徐州工程学院 A kind of desulfurization wastewater drop evaporation test device and test method
CN109781420A (en) * 2019-03-06 2019-05-21 中北大学 An experimental device for visualizing high-pressure tumble air intake of an engine
CN110361185A (en) * 2019-08-20 2019-10-22 楼蓝科技(苏州)有限公司 A kind of optical measuring device for gas turbine fuel nozzle
CN110672041A (en) * 2019-10-15 2020-01-10 成都飞机工业(集团)有限责任公司 An experimental device for measuring fog cone angle based on image
CN110823758A (en) * 2019-10-29 2020-02-21 西安交通大学 Observation device for powder density distribution and image processing and nozzle optimization method
CN110907420A (en) * 2019-12-04 2020-03-24 中国科学院过程工程研究所 A kind of measuring device for the equilibrium time of mass transfer between immiscible solution and liquid phase and measuring method using the same
CN110907420B (en) * 2019-12-04 2021-07-02 中国科学院过程工程研究所 A kind of measuring device for the equilibrium time of mass transfer between immiscible solution and liquid phase and measuring method using the same
CN111735744A (en) * 2020-04-24 2020-10-02 昆明理工大学 A method for evaluating the spatial distribution of nozzle atomization
CN111735744B (en) * 2020-04-24 2023-02-28 昆明理工大学 A Nozzle Atomization Spatial Distribution Evaluation Method
CN111650171A (en) * 2020-07-03 2020-09-11 中国科学院工程热物理研究所 Quantitative measurement and calibration method of high temperature and high pressure fuel concentration field of fuel nozzle
CN111650171B (en) * 2020-07-03 2023-08-18 中国科学院工程热物理研究所 A Quantitative Measurement and Calibration Method of High Temperature and High Pressure Fuel Concentration Field of Fuel Nozzle
CN114993895A (en) * 2022-05-31 2022-09-02 江苏大学 Test device and method for synchronously measuring spray far-field droplet particle size and droplet instantaneous velocity distribution
CN118794646A (en) * 2024-09-12 2024-10-18 中国航空工业集团公司沈阳空气动力研究所 A particle tracing system and diagnostic test method based on Ludwig tube wind tunnel

Similar Documents

Publication Publication Date Title
CN103760142A (en) Optical measuring method and device for spatial distribution of liquid droplets of fuel nozzle
US20070236693A1 (en) Calibration of optical patternator spray parameter measurements
CN103983581B (en) Method and device for measuring gas-solid jet flow field by combining terahertz wave and infrared light wave
CN105043946B (en) Angle of scattering self-calibration whole audience rainbow measuring method and device based on dual wavelength
CN108226120B (en) Device and method for measuring size and energy distribution of sheet laser beam
CN105973852B (en) Fuel jet distribution of concentration test device and its implementation method
Mayhew et al. Spray characteristics and flame structure of Jet A and alternative jet fuels
US9459216B2 (en) Method for characterizing flame and spray structures in windowless chambers
US20100172471A1 (en) Method and apparatus for characterizing flame and spray structure in windowless chambers
CN110095416A (en) A kind of metal bath laser absorption rate distributing on-line measurement system and method
Wernet et al. PIV and rotational Raman-based temperature measurements for CFD validation in a single injector cooling flow
Heath et al. Optical characterization of a multipoint lean direct injector for gas turbine combustors: Velocity and fuel drop size measurements
WO2016142859A1 (en) Method and system for illuminating seeding particles in flow visualisation
Kulkarni et al. Planar liquid volume fraction measurements in air-blast sprays using SLIPI technique with numerical corrections
Willert et al. Application of planar Doppler velocimetry within piston engine cylinders
Koh et al. Development of quantitative measurement of fuel mass distribution using planar imaging technique
Kulkarni et al. Improvements in laser sheet dropsizing using numerical and experimental techniques
Corber et al. Planar LIF/MIE ratio droplet sizing using structured laser sheet imaging at elevated ambient pressures
CN103884712B (en) A kind of oxygen/iodine supersonic speed heat of mixing flow-field test device
Zelina et al. Fuel injector characterization using laser diagnostics at atmospheric and elevated pressures
Tan et al. Application of planar laser-induced phosphorescence to investigate jet-a injection into a cross-flow of hot air
CN115596574B (en) Time-resolved injector mixing ratio distribution measurement system and method
CN207197991U (en) A kind of laser testing device of the fuel-flooded atomizing particle dispersing characteristic based on fluorescent tracing
Matsuura et al. Effects of ambient pressure on spray characteristics of a high-shear-type aero-engine airblast fuel injector
Kulkarni et al. Planar drop-sizing in dense fuel sprays using advanced laser diagnostic techniques

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20140430