CN110530923A - A kind of the film cooling flowing and Experimental Study of Heat Transfer Characteristics test macro of band crossing current - Google Patents
A kind of the film cooling flowing and Experimental Study of Heat Transfer Characteristics test macro of band crossing current Download PDFInfo
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Abstract
本发明公开了一种带横流的平板气膜冷却流动及换热特性实验测试系统，包括主流风洞本体和平板实验测试段等。主流风洞本体的气源依次连通风洞通道及平板实验测试段，平板实验测试段通过气膜孔板与冷气腔上下连通，平板实验测试段周围布置有温度采集系统及流场PIV测试系统。工作时，主流气源将主流空气送入平板实验测试段，冷气供给系统将带有示踪粒子的冷气工质送入冷气腔，经过气膜孔板流向测试壁面参与流动换热；激光器发射激光照射示踪粒子，双曝光CCD相机记录流场结构信息；关闭激光器，打开红外测试系统，红外热像仪记录测温壁面的温度分布信息。本发明对开展多孔型、多横流雷诺数和高横流密度比的横流平板气膜冷却实验机理研究具有重要意义。
The invention discloses a flat film cooling flow and heat transfer characteristic experimental testing system with cross flow, which comprises a mainstream wind tunnel body, a flat experimental testing section and the like. The air source of the mainstream wind tunnel body is sequentially connected to the ventilation tunnel channel and the flat panel test section. The flat panel test section is connected up and down with the cold air chamber through the air film orifice plate. The temperature acquisition system and the flow field PIV test system are arranged around the panel test section. When working, the mainstream air source sends the mainstream air into the test section of the flat plate experiment, and the cold air supply system sends the cold air working medium with tracer particles into the cold air cavity, and flows through the air film orifice plate to the test wall to participate in flow heat exchange; the laser emits laser light The tracer particles are irradiated, and the double-exposure CCD camera records the flow field structure information; the laser is turned off, the infrared test system is turned on, and the infrared thermal imager records the temperature distribution information of the temperature measurement wall. The invention is of great significance to the research on the experimental mechanism of the cross-flow plate film cooling with multiple holes, multiple cross-flow Reynolds numbers and high cross-flow density ratio.
Description
技术领域technical field
本发明涉及一种横流平板气膜冷却实验系统，具体涉及一种带横流的平板气膜冷却流动及换热特性实验测试系统。The invention relates to a cross-flow flat film cooling experimental system, in particular to a cross-flow flat film cooling flow and heat transfer characteristic experimental testing system.
背景技术Background technique
燃气轮机是一种先进而复杂的成套动力机械装备，是典型的高新技术密集型产品。燃气初温是影响燃气轮机效率的重要因素，燃气初温的升高对于提高燃气轮机的效率具有重要意义。目前，航空发动机透平进口温度则超过了1800℃，以纯氢作为燃料的未来级重型燃气轮机的透平进口初温也将达到1700℃，这对燃机热端部件的耐温性能提出了更高要求。Gas turbine is an advanced and complex complete set of power machinery equipment, and it is a typical high-tech intensive product. The initial gas temperature is an important factor affecting the efficiency of the gas turbine, and the increase of the initial gas temperature is of great significance for improving the efficiency of the gas turbine. At present, the turbine inlet temperature of aero-engines exceeds 1800°C, and the initial turbine inlet temperature of future heavy-duty gas turbines fueled by pure hydrogen will also reach 1700°C, which puts higher demands on the temperature resistance of the hot-end components of the gas turbine. Require.
目前常用的壁面冷却技术、热障涂层技术及耐高温材料技术得到了充分发展。作为壁面冷却技术中的重要一员，气膜冷却起到了举足轻重的作用。气膜冷却是最为直接最为有效的冷却方式，广泛应用于燃烧室、透平叶片、端壁等热端部件。目前国内外绝大多数气膜冷却相关研究均采用静止气室供气的简化方式，而在实际涡轮叶片中进气方式为横流进气，因此在横流条件下探究气膜冷却的换热机理显得尤为重要。燃气轮机叶片内部流动真实的横流密度比约为2，而根据已公开的资料显示，目前国内外对于横流研究的实验均在低密度比(1左右)工况下进行，与实际情况相差较远；另外，密度比对于气膜冷却效果影响显著，横流密度比对于气膜冷却效果影响的研究十分重要。Currently commonly used wall cooling technology, thermal barrier coating technology and high temperature resistant material technology have been fully developed. As an important member of wall cooling technology, film cooling plays a pivotal role. Air film cooling is the most direct and effective cooling method, widely used in combustion chambers, turbine blades, end walls and other hot end components. At present, most of the researches on film cooling at home and abroad adopt the simplified method of air supply in the static chamber, but the air intake in the actual turbine blade is cross-flow air intake. especially important. The true cross-flow density ratio of the flow inside the gas turbine blade is about 2, and according to the published data, the experiments on cross-flow research at home and abroad are all carried out under the condition of low density ratio (about 1), which is far from the actual situation; In addition, the density ratio has a significant impact on the film cooling effect, and the research on the influence of the cross flow density ratio on the film cooling effect is very important.
发明内容Contents of the invention
为了克服以上缺点，本发明提供了一种带横流的平板气膜冷却流动及换热特性实验测试系统，该系统通过改变冷却气流温度以及使用不同密度的冷却工质实现高横流密度比；内部的温度采集系统和流场PIV测试系统能够对气膜孔下游的换热细节及流场特征精确捕捉。以上发明内容对开展多孔型、多横流雷诺数、高横流密度比的横流平板气膜冷却实验机理研究具有重要意义。In order to overcome the above disadvantages, the present invention provides a flat film cooling flow and heat transfer characteristic experimental testing system with cross flow, which realizes a high cross flow density ratio by changing the temperature of the cooling air flow and using cooling fluids of different densities; the internal The temperature acquisition system and flow field PIV test system can accurately capture the heat transfer details and flow field characteristics downstream of the gas film hole. The above inventions are of great significance to the research on the experimental mechanism of cross-flow flat film cooling with multiple holes, multiple cross-flow Reynolds numbers, and high cross-flow density ratio.
本发明采用如下技术方案实现：The present invention adopts following technical scheme to realize:
一种带横流的平板气膜冷却流动及换热特性实验测试系统，包括主流风洞本体、平板实验测试段、冷气供给系统、温度采集系统和流场PIV测试系统；其中，An experimental test system for flat film cooling flow and heat transfer characteristics with cross-flow, including a mainstream wind tunnel body, a flat plate experimental test section, a cold air supply system, a temperature acquisition system and a flow field PIV test system; wherein,
主流风洞本体的气源为空气压缩机，空气压缩机的出口连通风洞通道的入口，风洞通道的出口连通平板实验测试段的入口，平板实验测试段的出口连通大气环境；The air source of the mainstream wind tunnel body is an air compressor, the outlet of the air compressor is connected to the entrance of the air tunnel passage, the outlet of the wind tunnel passage is connected to the entrance of the flat panel test section, and the outlet of the flat panel test section is connected to the atmospheric environment;
冷气供给系统包括冷气腔，冷气腔位于平板实验测试段正下方，且冷气腔与平板实验测试段通过气膜孔板上下连通；The cold air supply system includes a cold air chamber, the cold air chamber is located directly below the flat panel test section, and the cold air chamber and the flat panel test section are connected up and down through the air film orifice plate;
温度采集系统包括红外测试系统、热电偶和热电偶温度采集模块；红外测试系统包括红外热像仪和设置在平板实验测试段的测试壁面正上方的有红外窗口，红外热像仪正对红外窗口设置；多个热电偶分别布置于平板实验测试段内气膜孔板上游、冷气腔和测试壁面上，热电偶的输出端连接至热电偶温度采集模块；The temperature acquisition system includes an infrared test system, a thermocouple and a thermocouple temperature acquisition module; the infrared test system includes an infrared thermal imager and an infrared window arranged directly above the test wall of the flat panel experiment test section, and the infrared thermal imager is facing the infrared window Setting; multiple thermocouples are respectively arranged on the upstream of the air film orifice plate, the cold air chamber and the test wall in the test section of the flat panel experiment, and the output terminals of the thermocouples are connected to the thermocouple temperature acquisition module;
流场PIV测试系统包括烟雾发生器、激光器和双曝光CCD相机，激光器和双曝光CCD相机垂直布置于平板实验测试段两侧；The flow field PIV test system includes a smoke generator, a laser and a double-exposure CCD camera. The laser and the double-exposure CCD camera are vertically arranged on both sides of the flat panel test section;
实验进行时，空气压缩机将主流空气通过风洞通道送入平板实验测试段中；烟雾发生器将示踪粒子送入冷气供给系统的管路中，冷气与示踪粒子充分混合后被送往冷气腔，并通过气膜孔板流向测试壁面；激光器发射激光照射示踪粒子，双曝光CCD相机将记录流场结构信息；关闭激光器，打开红外测试系统，红外热像仪将记录测温壁面的温度分布信息。When the experiment is in progress, the air compressor sends the mainstream air into the test section of the flat panel experiment through the wind tunnel channel; the smoke generator sends the tracer particles into the pipeline of the cold air supply system, and the cold air and the tracer particles are fully mixed and then sent to the test section. The cold air chamber flows to the test wall through the air film orifice; the laser emits laser light to irradiate the tracer particles, and the double-exposure CCD camera will record the flow field structure information; turn off the laser, turn on the infrared test system, and the infrared thermal imager will record the temperature of the temperature measurement wall. temperature distribution information.
本发明进一步的改进在于，主流风洞本体包括依次连通的空气压缩机、稳压罐、主流风洞减压阀、加热段、扩张段、稳压段、收缩段以及湍流格栅；加热段内设置有电加热器；稳压段内按照气体流动方向依次设置主流蜂窝整流板及阻尼网；湍流格栅用于改变平板实验测试段内气流湍流度。A further improvement of the present invention is that the mainstream wind tunnel body includes an air compressor, a surge tank, a pressure reducing valve for the mainstream wind tunnel, a heating section, an expansion section, a stabilizing section, a contraction section, and a turbulence grid connected in sequence; An electric heater is provided; mainstream honeycomb rectifying plates and damping nets are arranged sequentially in the pressure stabilizing section according to the direction of gas flow; turbulence grids are used to change the air turbulence degree in the test section of the flat panel experiment.
本发明进一步的改进在于，稳压罐与加热段之间还设置有主流风洞减压阀。A further improvement of the present invention is that a mainstream wind tunnel decompression valve is also arranged between the surge tank and the heating section.
本发明进一步的改进在于，平板实验测试段内设置有压力-湍流度测量装置。The further improvement of the present invention lies in that a pressure-turbulence degree measuring device is arranged in the test section of the flat plate experiment.
本发明进一步的改进在于，气膜孔板为可拆卸结构，能够安装不同孔型的孔板便于开展不同气膜孔型的冷却换热实验。The further improvement of the present invention is that the air film orifice plate is a detachable structure, and the orifice plates of different hole types can be installed to facilitate the cooling and heat exchange experiments of different air film hole types.
本发明进一步的改进在于，冷气供给系统还包括气瓶，气瓶用于将不同密度气体经过冷气减压阀送入冷气供给系统管路，冷气减压阀出口连接前三通入口，前三通的出口分为两路，第一出口依次连接第一球阀和烟雾发生器，第二出口依次连接第二球阀和气体冷却装置；两条支路分别连接后三通的两个入口，后三通出口连通冷气腔入口；冷气腔内布置有冷气蜂窝整流板及冷气压力测量装置；冷气腔出口通过第三球阀最终通向环境大气。A further improvement of the present invention is that the cold air supply system also includes a gas cylinder, which is used to send gases of different densities into the pipeline of the cold air supply system through the cold air pressure reducing valve. The outlet is divided into two ways, the first outlet is connected to the first ball valve and the smoke generator in turn, and the second outlet is connected to the second ball valve and the gas cooling device in turn; the two branches are respectively connected to the two inlets of the rear three-way, and the rear three-way The outlet is connected to the inlet of the cold air chamber; a cold air honeycomb rectifying plate and a cold air pressure measuring device are arranged in the cold air chamber; the outlet of the cold air chamber finally leads to the ambient atmosphere through the third ball valve.
本发明进一步的改进在于，后三通出口连通冷气供给系统的第一流量计后连通冷气腔入口，冷气腔出口的管道上还设置有第二流量计。A further improvement of the present invention is that the rear three-way outlet is connected to the first flowmeter of the cold air supply system and then connected to the inlet of the cold air chamber, and a second flowmeter is also arranged on the pipe at the outlet of the cold air chamber.
本发明具有以下有益的技术效果：The present invention has the following beneficial technical effects:
本发明提供的一种带横流的平板气膜冷却流动及换热特性实验测试系统，在具体操作时，空气压缩机将主流空气送入稳压罐中保持气源压力稳定，通过调节主流风洞减压阀使流入主流风洞内的气体满足实验温度、压力、流量要求并进入平板实验测试段。与此同时，气瓶通过阀门可将不同密度、不同流量的气体送入冷气供给系统，烟雾发生器将示踪粒子送入冷气供给管路中，与冷气充分混合后进入冷气腔经过气膜孔板流向测试壁面；激光器发射激光照射示踪粒子，双曝光CCD相机将记录流场结构信息；关闭激光器，打开红外测试系统，红外热像仪将记录测温壁面的温度分布信息。The present invention provides a flat film cooling flow and heat transfer characteristic experimental testing system with cross-flow. The pressure reducing valve enables the gas flowing into the mainstream wind tunnel to meet the experimental temperature, pressure, and flow requirements and enter the test section of the flat panel experiment. At the same time, the gas cylinder can send gases of different densities and flows into the cold air supply system through the valve, and the smoke generator sends the tracer particles into the cold air supply pipeline, and after being fully mixed with the cold air, it enters the cold air cavity and passes through the air film hole The plate flows to the test wall; the laser emits laser light to irradiate the tracer particles, and the double-exposure CCD camera will record the flow field structure information; turn off the laser, turn on the infrared test system, and the infrared thermal imager will record the temperature distribution information on the temperature measurement wall.
附图说明Description of drawings
图1为本发明的结构示意图；Fig. 1 is a structural representation of the present invention;
附图标记说明：Explanation of reference signs:
1为空气压缩机，2为稳压罐，3为主流风洞减压阀，4为加热段，5为扩张段，6为稳压段，7为主流蜂窝整流板，8为阻尼网，9为收缩段，10为湍流格栅，11为压力-湍流度测量装置，12为气膜孔板，13为测试壁面，14为平板实验测试段，15为气瓶，16为冷气减压阀，17为前三通，18为第一球阀，19为气体冷却装置，20为后三通，21为第一流量计，22为冷气蜂窝整流板，23为冷气腔，24为冷气压力测量装置，25为第二流量计，26为第三球阀，27为热电偶，28为热电偶温度采集模块，29为红外热像仪，30为红外窗口，31为激光器，32为双曝光CCD相机，33为第二球阀，34为烟雾发生器。1 is the air compressor, 2 is the surge tank, 3 is the pressure reducing valve of the mainstream wind tunnel, 4 is the heating section, 5 is the expansion section, 6 is the pressure stabilization section, 7 is the mainstream honeycomb rectifying plate, 8 is the damping net, 9 is the contraction section, 10 is the turbulent grid, 11 is the pressure-turbulence measuring device, 12 is the air film orifice plate, 13 is the test wall, 14 is the plate experiment test section, 15 is the gas cylinder, 16 is the cold air pressure reducing valve, 17 is the front three-way, 18 is the first ball valve, 19 is the gas cooling device, 20 is the rear three-way, 21 is the first flow meter, 22 is the cold air honeycomb rectifier plate, 23 is the cold air cavity, 24 is the cold air pressure measuring device, 25 is the second flow meter, 26 is the third ball valve, 27 is a thermocouple, 28 is a thermocouple temperature acquisition module, 29 is an infrared thermal imager, 30 is an infrared window, 31 is a laser, 32 is a double exposure CCD camera, 33 For the second ball valve, 34 is a smoke generator.
具体实施方式Detailed ways
下面结合附图对本发明做进一步详细描述：The present invention is described in further detail below in conjunction with accompanying drawing:
参考图1，本发明提供的一种带横流的平板气膜冷却流动及换热特性实验测试系统，包括主流风洞本体、平板实验测试段14、冷气供给系统、温度采集系统和流场PIV测试系统；其中，主流风洞本体的气源为空气压缩机1，空气压缩机1的出口连通风洞通道的入口，风洞通道的出口连通平板实验测试段14的入口，平板实验测试段14的出口连通大气环境。气膜孔板12及测试壁面13安装在平板实验测试段内。冷气供给系统包括冷气腔23，冷气腔23位于平板实验测试段14正下方，冷气腔23与平板实验测试段14通过气膜孔板12上下连通。温度采集系统包括红外测试系统、热电偶27和热电偶温度采集模块28。红外测试系统包括红外热像仪29和设置在平板实验测试段14的测试壁面13正上方的有红外窗口30，红外热像仪29正对红外窗口30设置；多个热电偶27分别布置于平板实验测试段14内气膜孔板12上游、冷气腔23和测试壁面13上，热电偶27的输出端连接至热电偶温度采集模块28。流场PIV测试系统包括烟雾发生器34、激光器31和双曝光CCD相机32，激光器31和双曝光CCD相机32垂直布置于平板实验测试段14两侧。实验进行时，空气压缩机1将主流空气通过风洞通道送入平板实验测试段14中；烟雾发生器34将示踪粒子送入冷气供给管路中，冷气与示踪粒子充分混合后被送往冷气腔23并通过气膜孔板12流向测试壁面13；激光器31发射激光照射示踪粒子，双曝光CCD相机32将记录流场结构信息；关闭激光器31，打开红外测试系统，红外热像仪29将记录测温壁面13的温度分布信息。With reference to Fig. 1, a kind of flat film cooling flow and heat transfer characteristics experimental testing system with cross-flow provided by the present invention, comprises mainstream wind tunnel main body, flat panel experiment test section 14, cold air supply system, temperature acquisition system and flow field PIV test System; wherein, the gas source of the mainstream wind tunnel body is an air compressor 1, the outlet of the air compressor 1 is connected to the entrance of the air tunnel passage, the outlet of the wind tunnel passage is connected to the entrance of the flat panel experimental test section 14, and the outlet of the flat panel experimental test section 14 The outlet is connected to the atmospheric environment. The air film orifice plate 12 and the test wall 13 are installed in the test section of the flat panel experiment. The cold air supply system includes a cold air chamber 23, which is located directly below the flat panel test section 14, and the cold air chamber 23 communicates with the flat panel test section 14 through the air film orifice plate 12 up and down. The temperature acquisition system includes an infrared test system, a thermocouple 27 and a thermocouple temperature acquisition module 28 . Infrared testing system comprises infrared thermal imager 29 and is arranged on the test wall 13 directly above of flat plate experiment test section 14 and has infrared window 30, and infrared thermal imager 29 is set up against infrared window 30; Multiple thermocouples 27 are respectively arranged on flat panel On the upstream of the air film orifice plate 12 in the experimental test section 14 , on the cold air cavity 23 and the test wall 13 , the output end of the thermocouple 27 is connected to the thermocouple temperature acquisition module 28 . The flow field PIV test system includes a smoke generator 34 , a laser 31 and a double-exposure CCD camera 32 , and the laser 31 and the double-exposure CCD camera 32 are vertically arranged on both sides of the flat panel test section 14 . During the experiment, the air compressor 1 sends the mainstream air into the test section 14 of the flat panel experiment through the wind tunnel channel; the smoke generator 34 sends the tracer particles into the cold air supply pipeline, and the cold air and the tracer particles are fully mixed and sent to the test section 14. To the cold air chamber 23 and flow to the test wall 13 through the air film orifice plate 12; the laser 31 emits laser light to irradiate the tracer particles, and the double-exposure CCD camera 32 will record the flow field structure information; turn off the laser 31, turn on the infrared test system, and the infrared thermal imager 29 will record the temperature distribution information of the temperature measuring wall surface 13 .
所述的主流风洞本体包括依次连通的空气压缩机1、稳压罐2、主流风洞减压阀3、加热段4、扩张段5、稳压段6、收缩段9以及湍流格栅10。其中，空气压缩机1流出的空气进入稳压罐2内保持压力稳定，经过主流风洞加压阀3后满足实验压力、流量要求的主流气体进入加热段4内升温。高温主流空气经扩张段5进入稳压段6内，主流速度降低并依次通过主流蜂窝整流板7及阻尼网8降低湍流度。主流进入收缩段9后流速增加，通过湍流格栅10增加湍流度以满足平板实验测试段14内对气体湍流度的要求。The mainstream wind tunnel body includes an air compressor 1, a surge tank 2, a mainstream wind tunnel pressure reducing valve 3, a heating section 4, an expansion section 5, a pressure stabilization section 6, a contraction section 9 and a turbulence grid 10 connected in sequence . Among them, the air flowing out of the air compressor 1 enters the surge tank 2 to keep the pressure stable, and after passing through the mainstream wind tunnel pressurization valve 3, the mainstream gas that meets the experimental pressure and flow requirements enters the heating section 4 to heat up. The high-temperature mainstream air enters the pressure-stabilizing section 6 through the expansion section 5, and the velocity of the main flow decreases and passes through the mainstream honeycomb rectifying plate 7 and the damping net 8 to reduce the degree of turbulence. After the main flow enters the constriction section 9, the flow velocity increases, and the turbulence degree is increased through the turbulence grid 10 to meet the requirements for the gas turbulence degree in the test section 14 of the flat panel experiment.
所述的平板实验测试段14内设置有压力-湍流度测量装置11。气膜孔板12为可拆卸设计，可以安装不同孔型的孔板便于开展不同气膜孔型的冷却换热实验。A pressure-turbulence measurement device 11 is arranged in the flat panel test section 14 . The air film orifice plate 12 is designed to be detachable, and can be installed with orifice plates of different hole patterns to facilitate cooling and heat transfer experiments of different air film hole patterns.
所述的冷气供给系统还包括气瓶15，气瓶15可将不同密度气体工质经过冷气减压阀16送入冷气供给系统管路，冷气减压阀16可根据实验所需的雷诺数调整流量。从冷气减压阀16流出后一路通过前三通17第一出口流向第一球阀33和烟雾发生器34；另一路通过前三通17第二出口流向第二球阀18和气体冷却装置19。经过冷却的气体工质与带有示踪粒子的气流在管道中充分混合后经过第一流量计21进入冷气腔23。带有示踪粒子的冷却气体工质经过冷气蜂窝整流板22后湍流度降低，一部分通过气膜孔板12进入平板实验测试段14参与气膜冷却流动换热，另一部分从冷气腔23出口流出，分别经过第二流量计25及第三球阀26并最终进入大气环境。冷气腔23内设置有压力测量装置24，第三球阀26可将冷气腔23内的工质压力维持一定值，便于压力的测量。The cold air supply system also includes a gas cylinder 15. The gas cylinder 15 can send gas working fluids of different densities into the pipeline of the cold air supply system through the cold air pressure reducing valve 16. The cold air pressure reducing valve 16 can be adjusted according to the Reynolds number required for the experiment. flow. After flowing out from the cold air pressure reducing valve 16, one path flows to the first ball valve 33 and the smoke generator 34 through the first outlet of the front three-way 17; The cooled gas working medium and the airflow with tracer particles are fully mixed in the pipeline and then enter the cold air cavity 23 through the first flow meter 21 . The cooling gas working medium with tracer particles passes through the cold air honeycomb rectifying plate 22, and the turbulence decreases. Part of it enters the flat panel experiment test section 14 through the air film orifice plate 12 to participate in the air film cooling flow and heat exchange, and the other part flows out from the outlet of the cold air chamber 23 , pass through the second flow meter 25 and the third ball valve 26 respectively and finally enter the atmospheric environment. A pressure measuring device 24 is arranged in the cold air chamber 23, and the third ball valve 26 can maintain the pressure of the working fluid in the cold air chamber 23 at a certain value, which is convenient for pressure measurement.
所述的平板实验测试段14内的压力-湍流度测量装置11和冷气腔23内的压力测量装置24均采用压力变送器实现对气体压力的测量；压力-湍流度测量装置11采用二维恒温热线测速仪(CTA)测量湍流度；冷气供给系统中气瓶15内分别装有氮气、二氧化碳和六氟化硫气体用以调节实验所需的不同横流密度比。The pressure-turbulence measurement device 11 in the flat panel test section 14 and the pressure measurement device 24 in the cold air cavity 23 all adopt pressure transmitters to measure the gas pressure; the pressure-turbulence measurement device 11 adopts two-dimensional The turbulent flow was measured by a constant temperature hot wire anemometer (CTA); nitrogen, carbon dioxide and sulfur hexafluoride gas were respectively installed in the gas cylinder 15 in the cold air supply system to adjust the different lateral flow density ratios required for the experiment.
所述的扩张段5、稳压段6和收缩段9均采用高温合金制成，通道内壁喷覆有隔热涂层，冷气供给系统管道外表面包覆石棉；平板实验测试段14采用有机玻璃制成；温度测试系统中的红外窗口30采用氟化钙(CaF)材质窗口；主流蜂窝整流板7和冷气蜂窝整流板22均采用铝质蜂窝整流板；阻尼网8采用200目的304钢网。The expansion section 5, the pressure stabilizing section 6 and the contraction section 9 are all made of superalloy, the inner wall of the channel is sprayed with a thermal insulation coating, and the outer surface of the cold air supply system pipe is covered with asbestos; the flat panel test section 14 is made of plexiglass Made; the infrared window 30 in the temperature testing system is made of calcium fluoride (CaF) material window; the mainstream honeycomb rectifying plate 7 and the cold air honeycomb rectifying plate 22 are all made of aluminum honeycomb rectifying plate; the damping net 8 is made of 200 mesh 304 steel mesh.
本发明的具体操作过程为：Concrete operation process of the present invention is:
在平板实验测试段14内安装需要测试的气膜孔板12，打开连接热电偶27的热电偶温度采集模块28，实时记录气膜孔板12上游、冷气腔23和测试壁面13上的温度值。开启空气压缩机1将空气送入稳压罐2维持压力恒定，调节主流风洞减压阀3和加热段4内的加热器，将满足实验温度、流量、压力要求的主流空气送入平板实验测试段14，实现主流环境并维持稳定。调节气罐15内气体工质比例，打开冷气减压阀16将一定压力的气体工质送入冷气供给系统。分别打开并调节第一球阀33和第二球阀18调节流经烟雾发生器34和气体冷却装置19的气体工质，使其满足实验对雷诺数的要求。调节第三球阀26将冷气腔23内的工质压力维持一定值，便于压力的测量；通过第一流量计21和第二流量计25的流量差计算流经气膜孔板12的气体流量。打开激光器31发射激光照亮平板实验测试段14内的示踪粒子，双曝光CCD相机对示踪粒子的运动行为进行连续拍照，获得清晰的粒子场图片，通过图像重构及互相关算法获得气膜孔下游流场结构信息；关闭激光器31，打开红外测试系统，红外热像仪29将记录测温壁面的温度分布信息。Install the air film orifice plate 12 that needs to be tested in the flat plate experiment test section 14, open the thermocouple temperature acquisition module 28 connected to the thermocouple 27, and record the temperature values on the upstream of the air film orifice plate 12, the cold air chamber 23 and the test wall surface 13 in real time . Turn on the air compressor 1 to send air into the surge tank 2 to maintain a constant pressure, adjust the pressure reducing valve 3 of the mainstream wind tunnel and the heater in the heating section 4, and send the mainstream air that meets the requirements of the experimental temperature, flow rate and pressure into the flat panel experiment Test segment 14, achieve mainstream environment and maintain stability. Adjust the gas working medium ratio in the gas tank 15, open the cold air pressure reducing valve 16 to send the gas working medium at a certain pressure into the cold air supply system. Respectively open and adjust the first ball valve 33 and the second ball valve 18 to adjust the gas working fluid flowing through the smoke generator 34 and the gas cooling device 19 to meet the requirements of the experiment for Reynolds number. Adjust the third ball valve 26 to maintain the pressure of the working medium in the cold air cavity 23 at a certain value, which is convenient for pressure measurement; the gas flow rate flowing through the gas film orifice 12 is calculated by the flow difference between the first flow meter 21 and the second flow meter 25 . Turn on the laser 31 to emit laser light to illuminate the tracer particles in the test section 14 of the flat panel experiment. The double-exposure CCD camera continuously takes pictures of the motion behavior of the tracer particles to obtain a clear picture of the particle field. Flow field structure information downstream of the membrane hole; turn off the laser 31, turn on the infrared testing system, and the infrared thermal imager 29 will record the temperature distribution information on the temperature measuring wall.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060555A (en) * | 2019-12-30 | 2020-04-24 | 武汉大学 | Method and device for measuring thermal conductivity and thermal diffusivity of thin film material under strain |
| CN111458370A (en) * | 2020-05-29 | 2020-07-28 | 山东雪圣电器有限公司 | Performance testing device and system for total heat exchange membrane |
| CN113006881A (en) * | 2021-04-09 | 2021-06-22 | 西安交通大学 | Blade leading edge double-cyclone impact cooling experiment test system and method |
| CN113138092A (en) * | 2021-05-24 | 2021-07-20 | 江苏海鸥冷却塔股份有限公司 | Fog dispersal module heat exchange performance testing arrangement |
| CN113155208A (en) * | 2021-05-25 | 2021-07-23 | 中国航发四川燃气涡轮研究院 | Gas flow detection device suitable for turbine blade |
| CN113483983A (en) * | 2021-09-08 | 2021-10-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Hole wall transverse flow characteristic measuring device and measuring method thereof |
| CN114264482A (en) * | 2021-12-22 | 2022-04-01 | 西安交通大学 | Experimental system for measuring comprehensive cooling efficiency of turbine blade top of gas turbine |
| CN115950914A (en) * | 2023-01-10 | 2023-04-11 | 哈尔滨工程大学 | Device for measuring cooling characteristic of wall surface of combustion chamber of gas turbine and modeling method thereof |
| CN117723327A (en) * | 2023-12-07 | 2024-03-19 | 中国科学院近代物理研究所 | 2K negative pressure visual heat exchanger test platform, system and use method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127264A (en) * | 1991-05-20 | 1992-07-07 | Thermal Surveys, Inc. | Methods of infrared visualization of air flow |
| CN101393071B (en) * | 2007-09-19 | 2010-12-22 | 中国科学院工程热物理研究所 | Visual observation and transient measurement method and apparatus for cooling process of turbine blade |
| EP2354783B1 (en) * | 2010-01-07 | 2012-10-24 | General Electric Company | Thermal inspection system and method incorporating external flow |
| CN103033535A (en) * | 2013-01-11 | 2013-04-10 | 西安交通大学 | Composite electronic chip cooling and boiling heat transfer enhancement experiment device |
| CN103048112A (en) * | 2012-12-07 | 2013-04-17 | 华中科技大学 | Device and method for measuring disturbance of cross flow fan impeller of pulsed gas laser |
-
2019
- 2019-08-05 CN CN201910718676.7A patent/CN110530923A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127264A (en) * | 1991-05-20 | 1992-07-07 | Thermal Surveys, Inc. | Methods of infrared visualization of air flow |
| CN101393071B (en) * | 2007-09-19 | 2010-12-22 | 中国科学院工程热物理研究所 | Visual observation and transient measurement method and apparatus for cooling process of turbine blade |
| EP2354783B1 (en) * | 2010-01-07 | 2012-10-24 | General Electric Company | Thermal inspection system and method incorporating external flow |
| CN103048112A (en) * | 2012-12-07 | 2013-04-17 | 华中科技大学 | Device and method for measuring disturbance of cross flow fan impeller of pulsed gas laser |
| CN103033535A (en) * | 2013-01-11 | 2013-04-10 | 西安交通大学 | Composite electronic chip cooling and boiling heat transfer enhancement experiment device |
Non-Patent Citations (3)
| Title |
|---|
| 宋英杰 等: "射流角与吹风比影响涡发生器强化气膜冷却性能的实验研究", 《推进技术》 * |
| 迟重然: "燃气轮机透平冷却结构作用机制与设计优化方法", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 陈鑫: "矩形叶栅风洞设计及流场品质分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060555A (en) * | 2019-12-30 | 2020-04-24 | 武汉大学 | Method and device for measuring thermal conductivity and thermal diffusivity of thin film material under strain |
| CN111458370A (en) * | 2020-05-29 | 2020-07-28 | 山东雪圣电器有限公司 | Performance testing device and system for total heat exchange membrane |
| CN113006881A (en) * | 2021-04-09 | 2021-06-22 | 西安交通大学 | Blade leading edge double-cyclone impact cooling experiment test system and method |
| CN113138092A (en) * | 2021-05-24 | 2021-07-20 | 江苏海鸥冷却塔股份有限公司 | Fog dispersal module heat exchange performance testing arrangement |
| CN113155208A (en) * | 2021-05-25 | 2021-07-23 | 中国航发四川燃气涡轮研究院 | Gas flow detection device suitable for turbine blade |
| CN113483983A (en) * | 2021-09-08 | 2021-10-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Hole wall transverse flow characteristic measuring device and measuring method thereof |
| CN114264482A (en) * | 2021-12-22 | 2022-04-01 | 西安交通大学 | Experimental system for measuring comprehensive cooling efficiency of turbine blade top of gas turbine |
| CN115950914A (en) * | 2023-01-10 | 2023-04-11 | 哈尔滨工程大学 | Device for measuring cooling characteristic of wall surface of combustion chamber of gas turbine and modeling method thereof |
| US12044597B1 (en) | 2023-01-10 | 2024-07-23 | Harbin Engineering University | Device for measuring wall surface cooling characteristic of gas turbine combustor and modeling method thereof |
| CN117723327A (en) * | 2023-12-07 | 2024-03-19 | 中国科学院近代物理研究所 | 2K negative pressure visual heat exchanger test platform, system and use method |
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Application publication date: 20191203 |