Gas turbine model combustion chamber spray measuring device based on high-speed gas curtain protection

Abstract

The invention belongs to the technical field of gas turbine testing, and particularly relates to a gas turbine model combustion chamber spray measuring device based on high-speed gas curtain protection, which comprises a gas turbine combustion chamber cavity, and a main gas diffusion area is arranged on the inner arc surface of the gas turbine combustion chamber cavity. A spraying core area is arranged on the side, close to the main fuel gas diffusion area, of the inner arc face of the gas wheel combustion chamber cavity, a spraying cone is fixedly installed on the surface of one side of the gas wheel combustion chamber cavity through a flange plate, the outer arc face of the spraying cone is connected with a machine testing suite in a penetrating mode, and an atomization liquid dropping cavity is formed in the connecting area between the machine testing suite and the spraying cone. A guide cover is arranged on the side, away from the atomization liquid dropping cavity, of the inner arc face of the machine measurement suite, detailed information of the particle size of liquid drops in spraying of the combustion chamber can be obtained through particle size distribution of the liquid drops collected at different positions of the overflow cylinder and the spiral flow guide plate, and problems in the combustion process can be found out by analyzing the detailed information. And effective control measures are adopted to ensure safe and stable operation of the combustion chamber.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas turbine testing, and specifically relates to a spray measurement device for a gas turbine model combustion chamber based on high-speed air curtain protection. Background Technique

[0002] A gas turbine is an advanced power device widely used in many fields such as aerospace, power generation, and ship propulsion. In the combustion chamber of a gas turbine, the spray state of fuel has a crucial impact on key performance indicators such as combustion efficiency, pollutant emissions, and combustion stability. An ideal spray can enable the fuel to mix fully and evenly with air, thereby achieving an efficient and stable combustion process, improving the thermal efficiency of the gas turbine, and reducing the emissions of harmful gases such as nitrogen oxides and carbon monoxide.

[0003] High-speed air curtain protection technology has gradually been applied to the field of gas turbine combustion chamber spray measurement. The high-speed air curtain can form a barrier between the measurement device and the harsh environment of the combustion chamber, effectively isolating the influence of high-temperature and high-pressure airflows, protecting the normal operation of the measurement device. At the same time, the air curtain can also have a certain regulating effect on the airflow field inside the combustion chamber, reducing the interference of the airflow on the spray and making the measurement results closer to the real spray state.

[0004] A patent with the Chinese invention patent publication number CN109387137B discloses a manual measuring device for the spray cone angle of a fuel nozzle, including a spray chamber. A fixture is provided at the first opening end of the spray chamber, and the fixture can place the fuel nozzle to be measured at the center of the first opening end. A through hole is provided on the side wall of the first opening end of the spray chamber, and the position of the through hole is set to be able to peek at the overall situation of the cone angle formed by the fuel sprayed from the fuel nozzle. A knife-edge ruler measuring device is provided inside the spray chamber. The knife-edge ruler measuring device includes a knife-edge ruler close to the spray cone angle, a connecting rod for fixing the knife-edge ruler, and an adjusting rod connected to the end of the knife-edge ruler connecting rod. The connecting rod is perpendicular to the adjusting rod. A transparent plate marked with scales is provided on the outer wall of the spray chamber at the position of the through hole. The knife-edge ruler measuring device also includes a knob and a pointer. The axis of the adjusting rod, the center of the knob, and the center of the end of the pointer coincide with the zero point of the scale. The knife-edge ruler, the adjusting rod, and the pointer can rotate with the rotation of the knob. The axis of the adjusting rod is on the same straight line as the diameter of the lower end face of the fuel nozzle to be measured.

[0005] However, the above technologies often have the following defects: The inside of a gas turbine combustion chamber is an extremely harsh environment with high temperature, high pressure, and high-speed airflows. In such an environment, it is very difficult for ordinary manual measuring devices to work stably and obtain accurate and reliable data. High temperature may cause deformation and damage to the components of the measuring instrument, high pressure will affect the sealing and signal transmission of the measuring probe, and high-speed airflows will strongly interfere with the spray pattern, resulting in distorted measurement results.

[0006] To this end, the present invention provides a spray measurement device for a gas turbine model combustion chamber based on high-speed air curtain protection. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0008] The technical solution adopted by the present invention to solve its technical problems is as follows: A spray measurement device for a gas turbine model combustion chamber based on high-speed air curtain protection according to the present invention includes a gas turbine combustion chamber cavity. The inner arc surface of the gas turbine combustion chamber cavity is provided with a main gas diffusion area. A spray core area is provided on one side of the inner arc surface of the gas turbine combustion chamber cavity close to the main gas diffusion area. A spray cone is fixedly installed on one side surface of the gas turbine combustion chamber cavity through a flange. An organic measurement kit is connected through the outer arc surface of the spray cone. An atomized droplet cavity is provided in the connection area between the organic measurement kit and the spray cone. A guide cover is provided on the inner arc surface of the organic measurement kit away from the atomized droplet cavity. A guide hole is opened on the upper surface of the guide cover. A middle section barrel is placed on the lower surface of the guide cover. Filter holes are provided on the inner arc surface of the middle section barrel. An overflow cylinder is provided on the inner bottom wall of the middle section barrel. A tangential air duct opening is provided on the upper surface of the overflow cylinder. A rotating cavity is provided in the middle of the lower surface of the overflow cylinder. A small port is provided at the bottom of the overflow cylinder close to the rotating cavity.

[0009] The small port is in through-fit with the rotating cavity. The number of the overflow cylinders is several and they are arranged in a circular array with the guide cover as the center. A sealing rubber end plate is movably clamped on the upper surface of the overflow cylinder. A butting arch plate is provided on the upper surface of the sealing rubber end plate.

[0010] A sealing pressure member is provided at the front end of one side of the butting arch plate. A stepped surface is provided on the upper surface of the sealing pressure member. A folded edge is provided at the edge of the upper surface of the sealing pressure member. The upper surface of the stepped surface abuts against the bottom end of the guide cover.

[0011] A gap is provided between the sealing rubber end plate and the butting arch plate. A sealing arched ring member is movably clamped in the gap between the sealing rubber end plate and the butting arch plate. An opening is opened on the upper surface of the sealing arched ring member. The opening corresponds to the opening of the overflow cylinder.

[0012] A cover plate member is provided at the top of the outer arc surface of the sealing arched ring member. The inner arc surface of the cover plate member is an arc structure. An assembly hole is provided on the upper surface of the cover plate member. A conical installation end surface is provided on the upper surface of the cover plate member close to one side of the assembly hole.

[0013] A separation cylinder is connected through the inner arc surface of the rotating cavity. A curve channel is provided on the upper surface of the separation cylinder. A spiral guide plate is provided on the outer arc surface of the separation cylinder.

[0014] The curved channel on the upper surface of the separation cylinder is placed at the tangential air inlet of the overflow cylinder, and the spiral guide plate is sleeved in the inner arc surface of the rotating cavity.

[0015] The inner arc surface of the separation cylinder is a hollow through structure. The inner arc surface of the separation cylinder is connected to the outer cylinder of the main body through connection. The upper surface of the outer cylinder of the main body is movably clamped with an upper sealing end, and the lower surface of the outer cylinder of the main body is movably clamped with a lower sealing end.

[0016] At the top of the inner arc surface of the upper sealing end, there is a sealing rod. At the top of the outer arc surface of the sealing rod, there is a pressing plate. On the upper surface of the pressing plate, a spring is fixedly installed. At the bottom of the outer arc surface of the outer cylinder of the main body, a sampling through pipe is connected through.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. By the droplet size distribution collected at different positions of the overflow cylinder and the spiral guide plate, detailed information on the droplet size in the combustion chamber spray can be obtained. Relying on the analysis of the detailed information, the problems in the combustion process can be found out, and effective control measures can be taken to ensure the safe and stable operation of the combustion chamber.

[0019] 2. By analyzing the extracted droplets with the sealing rod, the droplet size can be measured, the droplet size distribution can be understood, the proportion of droplets of different sizes in the spray can be known, the contact area between fuel and air can be increased, which is conducive to full combustion, improving the combustion efficiency. Also, the shape of the droplets can be analyzed to judge the deformation of the droplets during the spray process, and further infer the force state and atomization quality during fuel injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the drawings.

[0021] Figure 1 is the combined three-dimensional view of the gas turbine combustion chamber cavity and the machine measurement kit of the present invention;

[0022] Figure 2 is the schematic diagram showing the internal structure of the machine measurement kit of the present invention with a partial flat section;

[0023] Figure 3 is the schematic diagram of the internal disassembly structure of the middle section barrel body of the present invention;

[0024] Figure 4 is the internal plane structure diagram of the present invention;

[0025] Figure 5 is the connection structure diagram of the cover plate member and the sealing arch ring member of the present invention;

[0026] Figure 6 is the schematic diagram of the overflow cylinder structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the separation cylinder structure in the present invention.

[0028] In the figure: 1. Gas turbine combustion chamber cavity; 101. Main gas diffusion area; 102. Spray core area; 103. Spray cone; 2. Machine side kit; 201. Atomized droplet cavity; 3. Guide cover; 301. Guide hole; 4. Middle section barrel; 5. Overflow cylinder; 501. Tangential air duct opening; 502. Rotation cavity; 503. Small port; 6. Sealing rubber end plate; 7. Abutting arch plate; 8. Sealing press piece; 801. Step surface; 802. Flange; 9. Sealing arch ring piece; 901. Opening; 10. Cover plate piece; 1011. Assembly hole; 1012. Conical installation end face; 11. Separation cylinder; 111. Curve channel; 112. Spiral guide plate; 12. Outer cylinder of the body; 121. Upper sealing end; 122. Lower sealing end; 13. Sealing rod; 131. Pressure plate; 132. Spring; 14. Connecting pipe. Specific embodiments

[0029] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0030] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 And Figure 6As shown in the figure, the embodiment of the present invention includes a gas turbine combustion chamber cavity 1. The inner arc surface of the gas turbine combustion chamber cavity 1 is provided with a main gas diffusion area 101. On one side of the inner arc surface of the gas turbine combustion chamber cavity 1 close to the main gas diffusion area 101, there is a spray core area 102. One side surface of the gas turbine combustion chamber cavity 1 is fixedly installed with a spray cone 103 through a flange. The outer arc surface of the spray cone 103 is connected with an engine-side kit 2 in a penetrating manner. An atomized droplet chamber 201 is provided in the connection area between the engine-side kit 2 and the spray cone 103. On the side of the inner arc surface of the engine-side kit 2 away from the atomized droplet chamber 201, there is a guide cover 3. A guide hole 301 is opened on the upper surface of the guide cover 3. A middle section barrel 4 is placed on the lower surface of the guide cover 3. The inner arc surface of the middle section barrel 4 is provided with filter holes. An overflow cylinder 5 is provided on the inner bottom wall of the middle section barrel 4. A tangential air duct opening 501 is provided on the upper surface of the overflow cylinder 5. A rotating cavity 502 is provided in the middle of the lower surface of the overflow cylinder 5. A small port 503 is provided at the bottom of the overflow cylinder 5 close to the rotating cavity 502. The small port 503 is in through-fit with the rotating cavity 502. The number of overflow cylinders 5 is several, and they are arranged in a circular array with the guide cover 3 as the center. A sealing end plate 6 is movably clamped on the upper surface of the overflow cylinder 5. A butting arch plate 7 is provided on the upper surface of the sealing end plate 6. A sealing presser 8 is provided at the front end of one side of the butting arch plate 7. A stepped surface 801 is provided on the upper surface of the sealing presser 8. A hem 802 is provided at the edge of the upper surface of the sealing presser 8. The upper surface of the stepped surface 801 abuts against the bottom end of the guide cover 3. There is a gap between the sealing end plate 6 and the butting arch plate 7. A sealing arched ring 9 is movably clamped in the gap between the sealing end plate 6 and the butting arch plate 7. An opening 901 is opened on the upper surface of the sealing arched ring 9. The opening 901 corresponds to the opening of the overflow cylinder 5. A cover plate 10 is provided at the top of the outer arc surface of the sealing arched ring 9. The inner arc surface of the cover plate 10 is an arc structure. An assembly hole 1011 is provided on the upper surface of the cover plate 10. A conical installation end face 1012 is provided on the upper surface of the cover plate 10 close to one side of the assembly hole 1011. A separation cylinder 11 is connected to the inner arc surface of the rotating cavity 502 in a penetrating manner. A curved channel 111 is provided on the upper surface of the separation cylinder 11. A spiral guide plate 112 is provided on the outer arc surface of the separation cylinder 11. The curved channel 111 on the upper surface of the separation cylinder 11 is placed at the tangential air duct opening 501 on one side of the overflow cylinder 5. The spiral guide plate 112 is sleeved in the inner arc surface of the rotating cavity 502.

[0031] The gas turbine combustion chamber cavity 1 provides a sealed environment for combustion. After the air passes through the main gas diffusion area 101, the air can be distributed in the combustion chamber in a relatively uniform manner, making initial contact with the fuel ejected from the fuel injector. When the fuel is injected into the combustion chamber at high pressure through the fuel injector, a dense droplet group is formed in the spray core area 102. Due to the special design of the fuel injector and the injection pressure, the fuel quickly breaks into fine droplets in this area. These droplets have high kinetic energy, and they collide, aggregate, and disperse with each other in the spray core area 102. During this process, the droplets start to make initial mixing with the air that gradually diffuses in from the surroundings. In the spray cone 103, the fuel droplets gradually diffuse from the core area to the edge, and the degree of mixing with the air also gradually increases. As the droplets move towards the edge of the spray cone 103, they come into contact with more air, and the mixing ratio gradually approaches the stoichiometric ratio, providing suitable mixture concentration conditions for the combustion reaction. When the mixture reaches the appropriate concentration and temperature, under the action of the ignition source, the combustion reaction first starts to occur in the edge area of the spray cone 103.

[0032] The machine measurement kit 2 is connected around the spray cone 103. The atomized droplet cavity 201 set inside it realizes the visualization function. The operator can clearly observe the movement trajectory of the droplets through the guiding hole 301 on the guiding cover 3. The droplets slowly slide down along the inner wall of the middle section barrel 4 and gradually approach the overflow cylinder 5 during this process.

[0033] When the droplet-containing airflow enters the overflow cylinder 5 through the tangential air duct opening 501, the airflow direction is tangent to the inner wall of the overflow cylinder 5. This entry method enables the airflow to instantly obtain the angular momentum of rotating around the central axis of the overflow cylinder 5, thereby driving the droplets to form a strong outer swirl flow. In the flow cavity of the overflow cylinder 5, the airflow and the droplets continuously perform rotational motion. This process further strengthens the action of centrifugal force on the droplets. The droplets are constantly centrifugally thrown towards the cavity wall in the rotating cavity 502. As time goes by, the droplets are continuously deposited at the bottom. To effectively prevent the evaporation problem caused by the high-temperature environment, the subsequent airflow droplets will rise along the sealed overflow cylinder 5.

[0034] In the inner arc surface of the overflow cylinder 5, a separation cylinder 11 is sleeved. The bottom of the outer arc surface of the separation cylinder 11 is provided with a spiral guide plate 112. When the droplet-containing airflow flows along the spiral guide plate 112, the droplets will follow the airflow to perform spiral motion, thereby generating a strong centrifugal force. The spiral guide plate 112 not only provides a movement path for the airflow droplets but also increases the residence time of the airflow and the droplets in the device. During this process, the droplets frequently coalesce with each other, and the originally tiny droplets gradually coalesce into large droplets. Due to the action of gravity, the aggregated large droplets will fall back into the overflow cylinder 5 again.

[0035] At this time, the large droplets collected at the bottom of the overflow tube 5 converge towards a specific collection area under the continuous action of gravity, and the droplets gradually rise to the bottom of the overflow tube 5 after multiple separations of the air flow. In the overflow tube 5, the airflow forms an external vortex through the tangential air duct opening 501, and the droplets are thrown to the cavity wall by centrifugal force. At the spiral guide plate 112 of the separation tube 11, the direction of the airflow keeps changing, and the droplets collide with other droplets or channel walls due to inertia, achieving aggregation and separation, which can capture droplets of different particle size ranges and improve the overall separation efficiency.

[0036] By collecting the droplet particle size distribution at different positions of the overflow tube 5 and the spiral guide plate 112, detailed information on the droplet particle size in the combustion chamber spray can be obtained. By analyzing the detailed information, problems in the combustion process can be found and effective control measures can be taken to ensure the safe and stable operation of the combustion chamber.

[0037] like Figure 2 and Figure 7 As shown, the inner arc surface of the separation cylinder 11 is a hollow through structure, and the inner arc surface of the separation cylinder 11 is connected with the main body outer cylinder 12 through it, and the upper surface of the main body outer cylinder 12 is movably connected with the upper sealing end 121, and the lower surface of the main body outer cylinder 12 is movably connected with the lower sealing end 122, and a sealing rod 13 is provided at the top of the inner arc surface of the upper sealing end 121, and a pressure plate 131 is provided at the top of the outer arc surface of the sealing rod 13, and a spring 132 is fixedly installed on the upper surface of the pressure plate 131, and a sampling tube 14 is connected with the bottom of the outer arc surface of the main body outer cylinder 12 through it.

[0038] Inside the overflow tube 5, as the air flow containing droplets continues to enter, the deposited liquid gradually increases after centrifugal action. Since the overflow tube 5 is in a sealed state, the continuously formed droplets will continuously squeeze the air originally existing inside the separation tube 11. As the droplets continue to accumulate, the pressure on the air gradually increases. Under the action of this continuously increasing pressure, the air is continuously compressed. When the pressure reaches a certain level, it will generate an upward lifting force on the sealing rod 13.

[0039] Under the action of this lifting force, the sealing rod 13 slowly moves upward. Because its top is firmly connected to the pressure plate 131, the upward movement of the sealing rod 13 directly drives the pressure plate 131 to move upward synchronously and move smoothly in the main body outer tube 12. In this process, since the spring 132 is originally in a natural extension state, when the sealing rod 13 rises, the spring 132 is squeezed by the pressure plate 131 and begins to shrink. As the spring 132 is continuously compressed, its stored elastic potential energy gradually increases. At the same time, the space between the sealing rod 13 and the main body outer tube 12 increases due to the rise of the sealing rod 13, the gas volume expands, and the pressure drops rapidly, thereby forming a negative pressure environment.

[0040] This negative pressure environment has a powerful suction force, which can effectively act on the dripping liquid deposited in the overflow cylinder 5. Under the attraction of the negative pressure, the dripping liquid overcomes its own gravity and the friction with the cylinder wall, and begins to slowly flow upward, moving towards the direction of the through pipe 14. As the dripping liquid continuously surges in, the liquid level inside the through pipe 14 gradually rises. When the liquid level in the through pipe 14 reaches a certain height, the dripping liquid will smoothly flow into a special collection container along the pre-designed drainage channel.

[0041] Through such a system design based on pressure change and negative pressure attraction, the deposited dripping liquid in the overflow cylinder 5 can be efficiently, automatically collected, processed and measured. By analyzing the extracted dripping liquid, the droplet size can be measured, the droplet size distribution can be understood, the proportion of droplets of different sizes in the spray can be known, the contact area between fuel and air can be increased, which is beneficial to full combustion and improve the combustion efficiency. In addition, the shape of the droplets can be analyzed, the deformation of the droplets during the spraying process can be judged, and the force state and atomization quality during fuel injection can be further inferred.

[0042] The above front, back, left, right, up and down are all based on the Figure 1 in the attached drawings of the specification. According to the standard of the observer's perspective, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection, characterized in that: The invention comprises a gas turbine combustion chamber cavity (1), wherein the inner arc surface of the gas turbine combustion chamber cavity (1) is provided with a main gas diffusion zone (101), and the inner arc surface of the gas turbine combustion chamber cavity (1) is provided with a spray core zone (102) on a side close to the main gas diffusion zone (101), and a spray cone (103) is fixedly mounted on a side surface of the gas turbine combustion chamber cavity (1) via a flange, and the outer arc surface of the spray cone (103) is connected to a mechanical test kit (2) through and through, and an atomizing drip chamber (201) is provided in the connection area between the mechanical test kit (2) and the spray cone (103), and the mechanical test kit A guide cover (3) is provided on the side of the inner arc surface of the atomizing and dripping chamber (201), the upper surface of the guide cover (3) is provided with a guide hole (301), a middle barrel body (4) is placed on the lower surface of the guide cover (3), the inner arc surface of the middle barrel body (4) is provided with a filter hole, an overflow tube (5) is provided on the inner bottom wall of the middle barrel body (4), the upper surface of the overflow tube (5) is provided with a tangential air duct opening (501), a rotating chamber (502) is provided in the middle of the lower surface of the overflow tube (5), and a small port (503) is provided at the bottom of the overflow tube (5) close to the rotating chamber (502).

2. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 1, characterized in that: The small port (503) is interconnected and adapted with the rotating chamber (502); the overflow tubes (5) are in a plurality and arranged in a circular array with the guide cover (3) as the center; a sealing end plate (6) is movably connected to the upper surface of the overflow tube (5); and a contact arch plate (7) is provided on the upper surface of the sealing end plate (6).

3. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 2, characterized in that: A sealing pressing piece (8) is provided at the front end of one side of the abutting arch plate (7), the upper surface of the sealing pressing piece (8) is provided with a stepped surface (801), the edge of the upper surface of the sealing pressing piece (8) is provided with a folded edge (802), and the upper surface of the stepped surface (801) is in abutment with the bottom end of the guide cover (3).

4. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 3, characterized in that: A gap is provided between the sealing end plate (6) and the abutting arch plate (7), and a sealing arch ring (9) is movably clamped in the gap between the sealing end plate (6) and the abutting arch plate (7). An opening (901) is provided on the upper surface of the sealing arch ring (9), and the opening (901) corresponds to the opening of the overflow tube (5).

5. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 4, characterized in that: A cover plate member (10) is provided at the top of the outer arc surface of the sealing arch ring member (9); the inner arc surface of the cover plate member (10) is an arc-shaped structure; an assembly hole (1011) is provided on the upper surface of the cover plate member (10); and a conical mounting end surface (1012) is provided on the upper surface of the cover plate member (10) close to the assembly hole (1011).

6. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 5, characterized in that: The inner arc surface of the rotary chamber (502) is connected to a separation cylinder (11), the upper surface of the separation cylinder (11) is provided with a curved channel (111), and the outer arc surface of the separation cylinder (11) is provided with a spiral guide plate (112).

7. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 6, characterized in that: The curved channel (111) on the upper surface of the separation cylinder (11) is placed at the tangential air duct opening (501) on one side of the overflow cylinder (5), and the spiral guide plate (112) is sleeved in the inner arc surface of the rotating chamber (502).

8. The gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 7 is characterized in that: The inner arc surface of the separation cylinder (11) is a hollow through structure, and the inner arc surface of the separation cylinder (11) is connected to the main body outer cylinder (12) through the inner arc surface, and the upper surface of the main body outer cylinder (12) is movably connected to an upper sealing end (121), and the lower surface of the main body outer cylinder (12) is movably connected to a lower sealing end (122).

9. A gas turbine model combustion chamber spray measurement device based on high-speed air curtain protection according to claim 8, characterized in that: A sealing rod (13) is provided at the top of the inner arc surface of the upper sealing end (121), a pressing plate (131) is provided at the top of the outer arc surface of the sealing rod (13), a spring (132) is fixedly mounted on the upper surface of the pressing plate (131), and a sampling tube (14) is connected to the bottom of the outer arc surface of the main body outer tube (12).

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