CN108802268B - Fuel droplet ignition temperature measuring device for visualization experiment - Google Patents
Fuel droplet ignition temperature measuring device for visualization experiment Download PDFInfo
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- CN108802268B CN108802268B CN201810377478.4A CN201810377478A CN108802268B CN 108802268 B CN108802268 B CN 108802268B CN 201810377478 A CN201810377478 A CN 201810377478A CN 108802268 B CN108802268 B CN 108802268B
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- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
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- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
本发明公开了一种可视化实验用燃料液滴点火测温装置，属于燃烧实验设备技术领域。本发明的点火测温装置，其燃烧室内设有对称分布的四根点火柱，这四根点火柱围绕形成矩形结构，每根点火柱上均设有间隔分布的两个点火丝紧固装置，通过点火丝紧固装置在四根点火柱之间紧固安装有四根对称分布的弧形点火丝；所述燃烧室的一侧设有供燃烧样品推送机构穿过的开孔，且燃烧样品推送机构的推送方向与弧形点火丝所在平面平行，并沿四根弧形点火丝的中心线方向分布。采用本发明的装置进行点火过程的稳定性较好，且该装置可以根据需要进行多次重复使用，其重复使用过程中能够有效保持较高的稳定性，从而保证实验结果的精确性。
The invention discloses a fuel droplet ignition temperature measuring device for visual experiment, which belongs to the technical field of combustion experiment equipment. In the ignition temperature measuring device of the present invention, four ignition columns are arranged symmetrically in the combustion chamber, and the four ignition columns are surrounded to form a rectangular structure. Four symmetrically distributed arc-shaped ignition wires are fastened and installed between the four ignition columns by the ignition wire fastening device; one side of the combustion chamber is provided with an opening for the combustion sample pushing mechanism to pass through, and the combustion sample is The pushing direction of the pushing mechanism is parallel to the plane where the arc-shaped ignition wires are located, and is distributed along the direction of the center line of the four arc-shaped ignition wires. The device of the present invention has better stability in the ignition process, and the device can be used repeatedly as required, and the device can effectively maintain high stability during the repeated use, thereby ensuring the accuracy of the experimental results.
Description
Technical Field
The invention belongs to the technical field of combustion experimental equipment, and particularly relates to a visualization device applied to the research of a fuel solid-liquid and solid-liquid mixed combustion mechanism.
Background
When new energy is continuously developed, a plurality of high-energy fuels are produced, the phases of the high-energy fuels are also various, and the ignition process of the high-energy fuels has important significance for the application of the high-energy fuels in combustion and propulsion and the disclosure of the combustion mechanism of the high-energy fuels. Currently, the ignition methods used in the research of high-energy fuel combustion are mainly: chemical ignition, powder ignition, laser ignition, and electrical ignition. The chemical ignition is adopted, the device is complex, the number of components is large, the system is not easy to simplify, and the igniter is used as required to select a proper proportioning relation according to the combustion characteristics of fuel, so that the experimental result is unreliable. The powder ignition is that the ignition powder is ignited by the resistance wire, the ignition powder is combusted to emit a large amount of heat to ignite the propellant, the method can not be recycled, the powder needs to be added again in each experiment, great inconvenience is brought to the experimental process, the ignition powder is adopted to ignite the high-energy fuel, the powder cannot ensure the content to be completely consistent, certain errors can be brought to the analysis of results such as combustion products, combustion temperature, combustion heat productivity and the like, the accuracy of the experiment is reduced, and the correct analysis of the combustion characteristics and the combustion mechanism of the high-energy fuel is influenced.
The research of laser ignition has become a research hotspot in recent years, the research of the ignition performance of the high-energy fuel by adopting laser as a stimulus source is because the laser has high and adjustable output energy, the ignition time and the energy can be controlled and are not limited by environmental factors, and the research of the ignition performance of the high-energy fuel has very important significance for disclosing the combustion mechanism of the high-energy fuel and verifying an ignition model. However, with laser ignition, the laser energy must be greater than the ignition energy threshold of the high-energy fuel, otherwise ignition is not possible, and thus there is a problem with ignition reliability with laser ignition. Secondly, by adopting laser ignition, the components, the proportion and the granularity of the high-energy fuel have great influence on the laser ignition process, particularly, the formula of some metal particles is adjusted according to the requirement in the research of the ignition process, the ignition condition needs to be selected according to the specific requirement, which brings much trouble to the research of the high-energy fuel with more complex formula, and once the laser source is unstable, the experiment needs to be terminated. The electric ignition is to directly utilize the electric energy to ignite the high-energy fuel, is convenient to control and relatively stable, and does not influence the experimental process, thereby being beneficial to ensuring the accuracy of the experimental result, and generally adopting an electric ignition mode in experimental research.
For example, the Chinese patent application No. 201110110037.6, the invention creation name is: novel ignition for experiments, the device of this application adopt the electric ignition mode to ignite high energy fuel equally, but this device research object is comparatively single, only is solid high energy fuel, and the means of igniting of this device is electric heating, but its heating temperature controllability is lower, and to under different experimental conditions, the condition that heating temperature probably changes, its temperature regulation and control is more troublesome to influence the accuracy of experimental result. In addition, the patent application No. ZL99245415.8 discloses a novel tubular high temperature furnace, but the resistance wire of the device adopting the application can affect the observation effect in the electric heating process, and the projection condition of the sample in the furnace and the related parameters of the synchronous test cannot be observed.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defects of the ignition mode for the existing high-energy fuel ignition process research, and provides a fuel droplet ignition temperature measuring device for a visual experiment. The ignition temperature measuring device provided by the invention can ignite fuel by means of the heat of the ignition wire, the stability of the ignition process is good, the device can be repeatedly used for many times according to the requirement, and the high stability can be effectively kept in the repeated use process, so that the accuracy of the experimental result is ensured.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a fuel droplet ignition temperature measuring device for a visual experiment, which comprises a combustion chamber, a combustion sample pushing mechanism and a data acquisition and processing mechanism, wherein a first ignition column, a second ignition column, a third ignition column and a fourth ignition column which are symmetrically distributed are arranged in the combustion chamber, the four ignition columns surround to form a rectangular structure, two ignition wire fastening devices which are distributed at intervals are arranged on each ignition column, and four arc ignition wires which are symmetrically distributed are fastened and installed between the four ignition columns through the ignition wire fastening devices; one side of the combustion chamber is provided with an opening through which the combustion sample pushing mechanism penetrates, and the pushing direction of the combustion sample pushing mechanism is parallel to the plane where the arc-shaped ignition wires are located and distributed along the direction of the central lines of the four arc-shaped ignition wires.
Furthermore, the ignition columns are made of stainless steel, and a detachable insulating ceramic sleeve is sleeved on an area above the upper ignition wire fastening device, an area below the lower ignition wire fastening device and an area between the two fastening devices on each ignition column.
Further, the ignition wire fastening device comprises an upper rotary plate and a lower rotary plate which are matched with each other, and the end part of the arc-shaped ignition wire is fastened on the exposed part of the ignition column through the fastening device.
Furthermore, the ignition wire is wound on the surface of the insulating circular arc-shaped center shaft and is made of nickel-chromium.
Furthermore, burning sample push mechanism include sample push rod, sealed end cap and sealing washer, the inside processing of sealed end cap has the through-hole that supplies sample push rod to pass, install sample push rod in the trompil of combustion chamber one side and seal through the sealing washer through sealed end cap, and the fluting of splendid attire fuel is seted up to the one end that sample push rod is located the combustion chamber.
Furthermore, the sample pushing rod is made of quartz, a through hole for installing a temperature thermocouple is formed in the sample pushing rod, and the temperature thermocouple is connected with a temperature data acquisition instrument outside the combustion chamber.
Furthermore, the combustion chamber corresponds with two parallel sides of sample propelling movement pole propelling movement direction and is equipped with the peephole, this peephole includes the stainless steel frame, the side center of this stainless steel frame and the laminating of combustion chamber lateral wall is equipped with the trompil, this trompil internal seal is filled and is installed perspective mirror, the side processing parallel with this perspective mirror on the stainless steel frame has the draw-in groove, demountable installation has convex lens in the draw-in groove, the quartzy material is all chooseed for use with perspective mirror to convex lens, and the focus of convex lens is corresponding with the tip position of thermocouple in the combustion chamber.
Furthermore, a base is arranged at the bottom of the combustion chamber, a sealing cover is arranged at the top of the combustion chamber, ignition holes for installing four ignition columns, a first temperature measuring hole and a second temperature measuring hole are formed in the base, a thermocouple is connected with a temperature controller on the base through a first temperature measuring hole and a second temperature measuring hole through a lead, the temperature controller is connected to an air protection switch, a plug is led out through the lead, and the air protection switch is externally connected with a power supply.
Furthermore, the side wall of the combustion chamber is provided with an air inlet pipe, an air outlet pipe, a flue gas analyzer guide pipe and a pressure sensor, wherein the air inlet pipe is connected with the air cylinder through an air guide pipe, the air outlet pipe is provided with a sealing valve, the flue gas analyzer guide pipe is connected with the flue gas analyzer, and the pressure sensor is connected with the pressure data acquisition instrument.
Furthermore, the flue gas analyzer, the pressure data acquisition instrument and the temperature data acquisition instrument are connected with a computer; the surface of the base is provided with a control dial.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) the fuel droplet ignition temperature measuring device for the visual experiment comprises a combustion chamber, a combustion sample pushing mechanism and a data acquisition and processing mechanism, wherein the structures of an ignition column and an ignition wire in the combustion chamber are optimally designed, the ignition wire integrally has two parallel similar circular structures consisting of four sections of symmetrical arc ignition wires, the pushing direction of the combustion sample pushing mechanism is parallel to the plane where the arc ignition wires are located, and the ignition wires are distributed along the central line direction of the four arc ignition wires, so that the uniformity of the temperature in the combustion chamber is favorably ensured, the uniformity and the stability of the temperature of a central point are particularly favorably ensured, the influence of the temperature difference of the surrounding environment of fuel on the combustion process of the fuel is reduced, and the accuracy of an experimental result is favorably ensured; meanwhile, the repeatability of the fuel combustion test performed by the device is high, and high stability can be effectively kept during each repeated test.
(2) According to the fuel droplet ignition temperature measuring device for the visualization experiment, the ignition columns are made of stainless steel, the area above the upper ignition wire fastening device, the area below the lower ignition wire fastening device and the area between the two fastening devices on each ignition column are respectively sleeved with the detachable insulating ceramic sleeves, and the end parts of the ignition wires are directly fastened on the exposed parts of the ignition columns through the ignition wire fastening devices, so that fuel ignition is facilitated through the ignition wires, and the ignition wires are simple to detach and convenient to use.
(3) According to the fuel droplet ignition temperature measuring device for the visual experiment, the ignition wire is wound on the surface of the insulating arc-shaped central shaft, and is supported and fixed through the insulating arc-shaped central shaft, so that the stability of the structure and the position of the ignition wire in the ignition process is guaranteed, and the influence on the experiment result due to the change of the shape and the position of the ignition wire is prevented.
(4) According to the fuel droplet ignition temperature measuring device for the visualization experiment, the combustion sample pushing mechanism comprises the sample pushing rod, the sealing plug and the sealing ring, and through the optimized design of the structure of the pushing mechanism, on one hand, the combustion test requirements of solid, liquid and solid-liquid mixed fuel can be met simultaneously, on the other hand, the structure of the pushing mechanism and the pushing operation of the fuel into the combustion chamber are simple, and the sealing performance of the combustion chamber and the stability of the internal atmosphere of the combustion chamber in the fuel combustion process can be effectively guaranteed.
(5) According to the fuel droplet ignition temperature measuring device for the visualization experiment, the through hole for mounting the temperature measuring thermocouple is formed in the sample pushing rod, the temperature measuring thermocouple is connected with the temperature data acquisition instrument outside the combustion chamber, and the temperature measuring thermocouple is mounted in the sample pushing rod, so that the temperature measuring thermocouple can be effectively protected, the thermocouple is prevented from being damaged in the combustion process, and the accuracy of experimental data measured by the temperature measuring thermocouple can be improved.
(6) According to the fuel droplet ignition temperature measuring device for the visualization experiment, the two side surfaces of the combustion chamber, which are parallel to the pushing direction of the sample pushing rod, are correspondingly provided with the peeping windows, the structures of the peeping windows are optimally designed, and particularly, the peeping lens and the convex lens are matched for use, so that the combustion process of fuel in the combustion chamber can be clearly observed and shot, and the research on the combustion process is facilitated. In addition, the convex lens is convenient to disassemble and replace by processing the clamping groove on the stainless steel frame, and different replaceable filters and the like for further analyzing flame and the like are convenient to observe.
(7) The fuel droplet ignition temperature measuring device for the visualization experiment has the advantages that the structure is simple, the device is convenient to disassemble, the gas inlet pipe and the gas outlet pipe are used for adjusting the combustion atmosphere and pressure in the combustion process, the components and the pressure of gas in a chamber can be changed, an external computer collects the combustion parameters in the chamber, the reaction process in the furnace can be favorably researched, the gas analyzer can disclose the reaction process, the temperature measuring thermocouple can research the combustion characteristics such as the ignition point of the fuel, and the like, and the device can be adopted for the influence of the influence factors of the temperature-controllable combustion chamber, the pressure and the atmosphere lamp on the combustion process.
Drawings
FIG. 1 is a schematic structural diagram of a fuel droplet ignition temperature measuring device for a visualization experiment according to the present invention;
FIG. 2 is a schematic view of the installation structure of the ignition column and the ignition wire in the present invention;
FIG. 3 is a schematic view of the mounting structure of the central shaft of the ignition wire of the present invention;
FIG. 4 is a schematic structural view of a pushing mechanism according to the present invention;
FIG. 5 is a schematic view of the structure of the observation window of the present invention.
The reference numerals in the schematic drawings illustrate:
1. a combustion chamber; 2. a base; 3. sealing the cover; 4. an air inlet pipe; 5. an air outlet pipe; 6. an air duct; 7. a sample push rod; 8. a temperature thermocouple; 9. a seal ring; 10. a peep window; 11. sealing the valve; 12. a pressure sensor; 13. a flue gas sampling pipe; 14. a gas cylinder; 15. a pressure data acquisition instrument; 16. a temperature data acquisition instrument; 17. a flue gas analyzer; 18. a computer; 19. fastening screws; 20. a convex lens; 21. a frame; 22. a card slot; 23. a first ignition hole; 24. a first temperature measuring hole; 25. a fourth fire hole; 26. upward rotating sheets; 27. a lower rotary plate; 28. a first ignition column; 29. a fourth fire column; 30. a third ignition column; 31. a second ignition column; 32. an ignition wire; 33. a thermocouple; 34. a third ignition hole; 35. a second ignition hole; 36. a second temperature measuring hole; 37. a left direction key; 38. a setting key; 39. a dial plate; 40. an up direction key; 41. an on-off key; 42. sealing the plug; 43. a ceramic sheath; 44. a middle shaft.
Detailed Description
For a further understanding of the invention, reference will now be made in detail to the embodiments illustrated in the drawings.
Example 1
With reference to fig. 1-4, the fuel droplet ignition temperature measuring device for the visualization experiment in the present embodiment includes a combustion chamber 1, a combustion sample pushing mechanism and a data collecting and processing mechanism, the fuel to be measured is pushed into the combustion chamber 1 by the combustion sample pushing mechanism to perform a combustion test, and parameters such as smoke components, pressure, temperature and the like during the combustion process of the fuel are collected, processed and analyzed by the data collecting and processing mechanism. Wherein, be equipped with first ignition post 28, second ignition post 31, third ignition post 30 and the fourth ignition post 29 of symmetric distribution in the combustion chamber 1, these four ignition posts are around forming the rectangle structure (being located the summit position of rectangle respectively), all are equipped with two ignition silk fastener of interval distribution on every ignition post, through ignition silk fastener fastening installation four arc ignition silk 32 of symmetric distribution between four ignition posts. Specifically, as shown in fig. 1 and 2, an arc-shaped ignition wire 32 is symmetrically and tightly mounted between the upper ignition wire fastening devices of the first ignition column 28 and the second ignition column 31 and between the lower ignition wire fastening devices thereof, an arc-shaped ignition wire 32 is symmetrically and tightly mounted between the upper ignition wire fastening devices of the third ignition column 30 and the fourth ignition column 29 and between the lower ignition wire fastening devices thereof, and four sections of ignition wires are symmetrically distributed. One side of the combustion chamber 1 is provided with an opening through which the combustion sample pushing mechanism passes, and the pushing direction of the combustion sample pushing mechanism is parallel to the plane where the arc-shaped ignition wires 32 are located and is distributed along the central line direction of the four arc-shaped ignition wires 32.
In the embodiment, the structures of the ignition column and the ignition wire in the combustion chamber 1 are optimally designed, the ignition wire is designed to be integrally in two parallel similar circular structures consisting of four sections of symmetrical arc ignition wires, the pushing direction of the combustion sample pushing mechanism is parallel to the plane where the arc ignition wires are located, and the pushing direction is distributed along the central line direction of the four arc ignition wires, so that the uniformity of the temperature in the combustion chamber is favorably ensured, the uniformity and the stability of the temperature at a central point are especially favorably ensured, the influence on the fuel combustion process caused by the temperature difference of the surrounding environment of the fuel is reduced, and the accuracy of an experimental result can be favorably ensured; meanwhile, the repeatability of the fuel combustion test performed by the device is high, and high stability can be effectively kept during each repeated test.
Example 2
The structure of the fuel droplet ignition temperature measuring device for the visualization experiment in the embodiment is basically the same as that in embodiment 1, and the difference is mainly that: referring to fig. 1-3, the ignition columns of the present embodiment are made of stainless steel, and each of the ignition columns is covered with a detachable insulating ceramic cover 43 in the area above the upper ignition wire fastening device, in the area below the lower ignition wire fastening device, and in the area between the two fastening devices, and the ignition column at the installation position of the ignition wire fastening device is exposed (without the ceramic cover 43). The ignition wire fastening means includes cooperating upper and lower flights 26 and 27 by which the end of an arcuate ignition wire 32 is fastened to the exposed portion of the ignition cylinder. As shown in fig. 3, the ignition wire 32 is wound on the surface of the insulating circular arc-shaped central shaft 44, the ignition wire 32 is made of nickel-chromium, and the central shaft 44 is used for supporting and fixing the ignition wire 32, so that the stability of the shape and the structure of the ignition wire 32 can be effectively improved, and the influence on the experimental result due to the change of the shape and the position of the ignition wire 32 in the ignition process can be prevented.
Specifically, one third and two thirds of each ignition column are provided with fastening rotary sheets, and a compression spring with one third of length is arranged between the two rotary sheets. The first ignition column and the fourth ignition column and the second ignition column and the third ignition column are connected by the ignition wire.
Example 3
The structure of the fuel droplet ignition temperature measuring device for the visualization experiment in the embodiment is basically the same as that in the embodiment 2, and the difference is mainly that: as shown in fig. 4, the burning sample pushing mechanism of this embodiment includes sample pushing rod 7, sealed end cap 42 and sealing washer 9, the inside processing of sealed end cap 42 has the through-hole that supplies sample pushing rod 7 to pass, install sample pushing rod 7 in the trompil of combustion chamber 1 one side and seal through sealing washer 9 through sealed end cap 42, and sample pushing rod 7 is located the one end of combustion chamber 1 and has seted up the fluting, can directly hold solid sample through this fluting, if the sample is liquid then directly hang on the thermocouple, as for mixed sample then put in the fluting can.
Therefore, through the structural design of the combustion sample pushing mechanism, on one hand, the combustion test requirements of solid, liquid and solid-liquid mixed fuel can be met simultaneously, on the other hand, the structure of the pushing mechanism and the pushing operation of the fuel into the combustion chamber are simple, and the sealing performance of the combustion chamber and the stability of the internal atmosphere in the combustion process of the fuel can be effectively guaranteed. Above-mentioned sample push rod 7's material is the quartz material, its inside through-hole that is equipped with installation temperature thermocouple 8, and temperature thermocouple 8 links to each other with 1 outside temperature data acquisition instrument 16 of combustion chamber, carry out real-time measurement and send temperature data acquisition instrument 16 to and carry out the processing analysis through temperature thermocouple 8 to the temperature in the fuel combustion process, this embodiment is through installing temperature thermocouple 8 in sample push rod 7, thereby both can protect temperature thermocouple 8 to prevent it from taking place to damage, simultaneously can also effectively improve measured data's accuracy and stability.
Example 4
The structure of the fuel droplet ignition temperature measuring device for the visualization experiment in the embodiment is basically the same as that in embodiment 3, and the difference is mainly that: referring to fig. 1 and 5, two parallel sides of the combustion chamber 1 and the sample pushing rod 7 in the pushing direction are correspondingly provided with a peeping hole 10, the peeping hole 10 comprises a stainless steel frame 21, the side center of the stainless steel frame 21, which is attached to the side wall of the combustion chamber 1, is provided with an opening, a perspective mirror is hermetically filled in the opening, a clamping groove 22 is formed in the side surface of the stainless steel frame 21, which is parallel to the perspective mirror, a convex lens 20 is detachably mounted in the clamping groove 22, the convex lens 20 and the perspective mirror are both made of quartz materials, and the focus of the convex lens 20 corresponds to the end position of a thermocouple 33 in the combustion chamber 1. The setting and the configuration optimization of peeping hole 10 are passed through to this embodiment, especially use through the cooperation of perspective mirror and convex lens, can clearly observe and shoot the combustion process of fuel in the combustion chamber, are favorable to the research of combustion process. In addition, the convex lens is convenient to disassemble and replace by processing the clamping groove on the stainless steel frame, and different replaceable filters and the like for further analyzing flame and the like are convenient to observe. In addition, the opening position of the peeping window 10 is parallel to the direction of the resistance wire, so that the vision field cannot be shielded or influenced due to heating of the resistance wire, and observation and shooting are facilitated.
Example 5
The structure of the fuel droplet ignition temperature measuring device for the visualization experiment in the embodiment is basically the same as that in embodiment 4, and the difference is mainly that: the bottom of combustion chamber 1 is equipped with base 2, and its top is equipped with closing cap 3, and is concrete, and the top of combustion chamber 1 is outwards extended all around and is formed the boss, and closing cap 3 corresponds fixedly with this boss promptly and links to each other, carries out fixed the linking to each other through fastening screw 19 in this embodiment. The base 2 is provided with ignition holes (a first ignition hole 23, a second ignition hole 35, a third ignition hole 34 and a fourth ignition hole 25 which are all made of insulating plastics) for installing four ignition columns, a first temperature measuring hole 24 and a second temperature measuring hole 36, a thermocouple 33 is connected with a temperature controller on the base through the first temperature measuring hole 24 and the second temperature measuring hole 36 through wires, the temperature controller is connected to an air protection switch, and a plug and an external power supply are led out through the wires. And the side wall of the combustion chamber 1 is provided with an air inlet pipe 4, an air outlet pipe 5, a guide pipe of a flue gas analyzer and a pressure sensor. Wherein the air inlet pipe 4 is connected with the air bottle 14 through the air duct 6, so that the combustion atmosphere in the combustion chamber can be adjusted and changed according to different experimental conditions; the air outlet pipe 5 is provided with a sealing valve 11, so that the air tightness can be effectively ensured, the sealing valve 11 is opened before an experiment, and the gas in the combustion chamber is discharged, so that the stability of the atmosphere in the combustion chamber is ensured. The flue gas analyzer guide pipe is connected with the flue gas analyzer 17, the pressure sensor is connected with the pressure data acquisition instrument 15, the flue gas analyzer 17 records atmosphere composition changes before and after reaction and in the reaction process, and the pressure data acquisition instrument 15 is used for detecting the pressure in the combustion chamber and ensuring the constant pressure before reaction. The flue gas analyzer 17, the pressure data acquisition instrument 15 and the temperature data acquisition instrument 16 are all connected with a computer 18; the surface of the base 2 is provided with a control dial. Combine the attached drawing, there are two left side dials in this embodiment, and the upper portion dial is used for showing current temperature, and the lower part dial is used for showing the settlement temperature. The control dial is correspondingly provided with operation buttons, such as a set key 38, a left direction key 37, an upper direction key 40 and an on-off key 41, so that the heating temperature can be set in advance before an experiment, and the heating environment is ensured to be stable and constant in temperature.
Example 6
Adopt example 5 for visual experiment fuel liquid drop ignition temperature measuring device to aluminium powder CO2The combustion mechanism in (1) is studied, and then the gas in the gas cylinder 14 is CO2. In specific use, CO is turned on2And (3) discharging air in the combustion chamber 1 through a sealing valve 11 on the air valve of the air bottle and the air outlet pipe 5, closing the air bottle 14 and the sealing valve 11, setting the temperature of the ignition wire, weighing 1g of 50nm aluminum powder in the notch at the end part of the sample pushing rod 7 after the temperature is stable, and completely embedding the temperature thermocouple 8 in the sample. The fuel is pushed into the combustion chamber quickly and is photographed using a high speed camera. The temperature data acquisition instrument records temperature data in the combustion process, and the pressure acquisition instrument and the flue gas analyzer record experimental data in real time. The embodiment can be used for preparing the nano aluminum powder in CO2The ignition temperature, the highest temperature, the flame morphology and the CO content in the product of the combustion under the atmosphere are researched, and the product in the groove can be used for observation and analysis such as a scanning electron microscope, a transmission electron microscope, X-ray diffraction and the like, so that the research on the CO content of the aluminum powder in the aluminum powder can be realized2The combustion mechanism in (1).
Example 7
The structure of the visualization device for researching the combustion mechanism of the experimental high-energy fuel is the same as that of the visualization device in the embodiment 6, except that: air was used as the gas and the sample was liquid fuel.
Preparing nano aluminum fluid with the concentration of 0%, 2.5%, 5%, 7.5% and 10%, opening a sealing valve 11 on an air cylinder air valve and an air outlet pipe 5 when the nano aluminum fluid is used, exhausting air in a combustion chamber 1, closing the air cylinder and the sealing valve 11, setting the temperature of an ignition wire, after the temperature is stable, extracting 10ul of nano fluid by using a needle tube, hanging the nano fluid on a thermocouple of a temperature thermocouple 8, quickly pushing the nano fluid into the combustion chamber, and shooting by using a high-speed camera. The temperature data acquisition instrument records the temperature in the combustion process, and the pressure acquisition instrument and the flue gas analyzer record experimental data in real time. The embodiment can be used for researching the ignition temperature, the highest temperature, the flame morphology and the smoke components in the product of the combustion of the nano fluid under the air atmosphere, and the products on the surfaces of the groove and the coupling head can be used for observation and analysis such as a scanning electron microscope, a transmission electron microscope, X-ray diffraction and the like, so that the combustion mechanism of the nano fluid in the air can be researched.
Example 8
The structure of the visualization device for researching the combustion mechanism of the experimental high-energy fuel is the same as that of the visualization device in the embodiment 6, except that: argon was used as the gas, and the sample was a liquid fuel.
Preparing nano aluminum fluid with the concentration of 0%, 2.5%, 5%, 7.5% and 10%, opening a sealing valve 11 on an air valve of an argon gas cylinder and an air outlet pipe 5 when the nano aluminum fluid is used, exhausting air in a combustion chamber, closing the air cylinder and the air valve, setting the temperature of an ignition wire, after the temperature is stable, extracting 10ul of nano fluid by using a needle tube, hanging the nano fluid on a thermocouple of a temperature thermocouple 8, quickly pushing the nano fluid into the combustion chamber, and shooting by using a high-speed camera. The temperature data acquisition instrument records the temperature in the combustion process, and the pressure acquisition instrument and the flue gas analyzer record experimental data in real time. The present embodiment can study the evaporation process of the nanofluid in the argon atmosphere, such as evaporation temperature, evaporation speed, micro-explosion phenomenon, and the like. After the normal pressure is set, the air valve can be opened to set the evaporation process change of the liquid drops under different pressure conditions of 0.1MPa, 0.5MPa, 1.0MPa, 1.5MPa, 2.0MPa and the like.
The present invention and the embodiments are described above schematically, the description is not limited, and the drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, the mechanism and the embodiment similar to the technical scheme without creation design will fall into the protection scope of the present invention without departing from the spirit of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377478.4A CN108802268B (en) | 2018-04-25 | 2018-04-25 | Fuel droplet ignition temperature measuring device for visualization experiment |
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| CN110376245A (en) * | 2019-07-08 | 2019-10-25 | 常州大学 | A kind of visual combustion chamber |
| CN110596188B (en) * | 2019-10-29 | 2022-07-19 | 中国民用航空总局第二研究所 | Test device and test method for flame spread of composite materials |
| CN110954794B (en) * | 2019-12-11 | 2022-04-12 | 中国科学院力学研究所 | A liquid propellant constant pressure discharge characteristic parameter measuring device |
| CN111257498A (en) * | 2020-02-18 | 2020-06-09 | 常州大学 | Visual experiment simulation device for researching fuel droplet combustion characteristics under high pressure |
| CN112304620B (en) * | 2020-09-30 | 2022-02-22 | 中国人民解放军战略支援部队航天工程大学 | Fuel droplet evaporation combustion experimental device in high-pressure and oscillation environment and use method |
| CN113390644B (en) * | 2021-08-17 | 2021-12-14 | 山东交通学院 | Combined shock wave reflection regulation experimental device for constant volume bomb |
| CN113686920A (en) * | 2021-08-19 | 2021-11-23 | 常州大学 | Experimental device and method suitable for suspension combustion of solid propellant |
| CN113640453A (en) * | 2021-08-19 | 2021-11-12 | 常州大学 | A combustion device suitable for property testing of solid and liquid fuels and method thereof |
| CN114965571A (en) * | 2022-04-08 | 2022-08-30 | 清华大学 | Fuel combustion characteristic measuring device |
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