A test device for measuring the cooling holes of flame tube

Abstract

The present invention discloses a test device for measuring the cooling holes of a flame tube, comprising: a mainstream air intake assembly, an exhaust assembly, a secondary air intake assembly, a test casing and a support seat; the mainstream air intake assembly is installed on the test casing by bolts; the exhaust assembly is installed on the test casing by bolts; the support seat is installed on the test casing by bolts; the secondary air intake assembly is installed on one side of the support seat by bolts. The test device of the present invention can measure the flow field characteristics and cooling efficiency of the cooling holes of the flame tube; a vortex finder and a head air intake hole are provided to simulate the flow state of the real mainstream swirl in the flame tube as much as possible; the initial cooling airflow forms a wall-attached cooling air film after passing through the slit formed between the cooling plate and the test plate, simulating the flow state of the real mainstream in the flame tube; a lead mounting seat is provided to facilitate real-time verification of the wall temperature data measured by the infrared thermal imager.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engine testing, and in particular relates to a testing device for measuring a flame tube cooling hole. Background Art

[0002] With the continuous improvement of the performance requirements of aircraft engines, the inlet temperature and temperature rise of the combustion chamber are constantly increasing. The cooling problem of the flame tube has attracted more and more attention from researchers because it will affect the service life of the combustion chamber. Carrying out flow field characteristic analysis and cooling efficiency measurement of the flame tube cooling structure or cooling hole is the main channel for studying the cooling problem of the flame tube. Through the flow field characteristic analysis, the cooling mechanism of the cooling structure or cooling hole can be explored to further explore the cooling potential. The cooling efficiency is an indicator to measure the cooling effect of a cooling structure or cooling hole. The cooling efficiency of the flame tube cooling hole is a very important design data in the design and development of the combustion chamber. However, different cooling structures of the flame tube and even different forms of cooling holes will lead to different flow field characteristics and cooling efficiency. Since there are many factors that affect the cooling efficiency, it is extremely important to obtain high-precision cooling efficiency data and flow field characteristics of the cooling holes in the flame tube under the real state, and the only way to do this is through experiments.

[0003] At present, two different test devices are required to measure the flow field characteristics and cooling efficiency of the flame tube cooling hole through experimental methods, and the method for measuring the cooling efficiency of the flame tube cooling hole is generally as follows: the test section is designed as a dual airflow channel structure with separate mainstream and secondary flows, and the test plate is set between the mainstream channel and the secondary flow channel. Under the action of the pressure difference, part of the secondary flow air enters the mainstream channel through the cooling holes on the test plate, and then is discharged together with the mainstream. The remaining air in the secondary flow is discharged separately from the secondary flow outlet. The cooling efficiency of the cooling hole under different airflow parameters or structural parameters is obtained through experiments.

[0004] The current cooling hole flow field test device cannot be used together with the cooling efficiency test device, thus greatly increasing the cost of processing the test transition section and the complexity of the test process. In addition, the above cooling efficiency test device has the following defects: although the test process takes into account the influence of the secondary flow of the two channels of the combustion chamber and the mainstream airflow of the flame tube, the mainstream airflow does not take into account the influence of the airflow rotation at the head of the flame tube and the initial cooling air film. During the test, the heat conduction of the test transition section has a great influence on the accuracy of the test results, and the air flow through the cooling holes on the test plate cannot be directly obtained. It is necessary to use two flow meters to obtain it through indirect measurement methods, using the mainstream outlet flow minus the mainstream inlet flow, or using the secondary flow inlet flow minus the secondary flow outlet flow. This flow acquisition method will lead to large errors in the test data. Summary of the invention

[0005] In view of the above problems, the present invention discloses a test device for measuring the cooling holes of a flame tube, comprising: a mainstream air intake component, an exhaust component, a secondary air intake component, a test casing and a support seat;

[0006] The mainstream air intake assembly is mounted on the test casing by bolts;

[0007] The exhaust assembly is mounted on the test casing by bolts;

[0008] The support seat is mounted on the test casing by bolts;

[0009] The secondary air intake assembly is mounted on one side of the support seat by means of bolts.

[0010] Furthermore, it also includes: a vortex finder mounting seat and a vortex finder;

[0011] The vortex finder mounting seat is a rectangular structure, with a vortex finder mounting hole in the middle and a second groove on the upper side;

[0012] The vortex finder is mounted on a vortex finder mounting seat; the vortex finder mounting seat is mounted on a mainstream air intake assembly by means of screws.

[0013] Furthermore, it also includes: a cooling fin;

[0014] The cooling fin is a straight-section flaky structure;

[0015] The cooling fin is mounted on the vortex finder mounting seat by means of screws.

[0016] Furthermore, it also includes: a test plate, a glass and a cover plate;

[0017] The test plate is a plate-like structure with bolt holes arranged around it;

[0018] A cooling hole is provided in the middle of the test plate;

[0019] The test plate is mounted on the support base by screws;

[0020] The glass is mounted on the test case;

[0021] The cover plate is mounted on the test casing by screws.

[0022] Furthermore, the mainstream air intake assembly includes a flange 1, an air intake cylinder, a total pressure and total temperature measuring seat 1, a flange 2, a static pressure nozzle 1, a flange boss and a head air intake hole;

[0023] The mainstream air inlet assembly is a rectangular channel structure with openings at both ends;

[0024] Bolt holes are arranged around the flange 1 for connecting with the air intake section of the vehicle platform;

[0025] Bolt holes are arranged around the flange 2 for connecting with the test casing; threaded holes are arranged on the flange boss of the flange 2 for connecting with the vortex finder mounting seat; a head air inlet hole is arranged on the upper side of the flange boss;

[0026] The air inlet cylinder is provided with a total pressure and total temperature measuring seat and a static pressure nozzle for measuring the pressure and temperature at the mainstream air inlet position.

[0027] Furthermore, the exhaust assembly includes an exhaust cylinder, a third flange, a fourth flange, a second total pressure and total temperature measuring seat, and a second static pressure nozzle;

[0028] The exhaust assembly is a rectangular channel structure with openings at both ends;

[0029] Bolt holes are arranged around the flange three and the flange four. The bolt holes on the flange three are used to connect with the test casing, and the bolt holes on the flange four are used to connect with the exhaust section of the platform.

[0030] The exhaust cylinder body is provided with two total pressure and total temperature measuring seats and two static pressure nozzles for monitoring the temperature and pressure at the mainstream outlet position.

[0031] Furthermore, the secondary air intake assembly includes a flange five, a rectangular cylinder, a bottom cover plate, an air duct, a flange six, a lead wire mounting seat and a static pressure nozzle three;

[0032] The secondary flow air intake assembly is a cylindrical structure, provided with an air intake end and an air exhaust end;

[0033] Bolt holes are arranged around the flange 5;

[0034] The bottom cover plate is arranged at the bottom of the rectangular cylinder;

[0035] The air duct is arranged on one side of the rectangular cylinder;

[0036] The flange 6 is arranged at the inlet of the air duct, and bolt holes are arranged around the flange 6 for connecting with the air inlet section of the vehicle platform;

[0037] The lead wire mounting seat is arranged on one side of the rectangular cylinder;

[0038] A static pressure nozzle three is arranged on the side of the rectangular cylinder for monitoring the pressure at the secondary flow inlet position.

[0039] Furthermore, the test case is provided with opening one, opening two, opening three, opening four, opening five, opening six and a first groove;

[0040] The test case is a rectangular structure;

[0041] The opening one is connected to the mainstream air intake assembly; the opening two is connected to the exhaust assembly; the opening three is used to install glass; the opening four is connected to the support seat and the secondary air intake assembly; the openings five and six are used to install glass or blocking plates.

[0042] Furthermore, the support seat includes a boss structure and an air duct hole;

[0043] The support seat is a hollow rectangular structure;

[0044] The air inlet hole is arranged on one side of the support seat, and is used to provide a channel for the initial cooling air flow.

[0045] Furthermore, the boss structure includes a test plate mounting surface and a support seat mounting surface; the test plate mounting surface is higher than the support seat mounting surface; the test plate mounting surface is provided with threaded holes around it for mounting the test plate; the support seat mounting surface is provided with bolt holes around it for connecting and fixing with the test casing and the secondary air intake assembly.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1) The two test functions of the flow field characteristics and cooling efficiency of the flame tube cooling hole are combined into one, which greatly reduces the processing cost of the test transition section and the complexity of the test process;

[0048] 2) The test device is equipped with a vortex finder and a head air inlet to simulate the flow state of the real mainstream swirl in the flame tube as much as possible;

[0049] 3) The test device can be equipped with mass flow meters in front of the mainstream air intake assembly and behind the secondary air intake assembly. At the same time, the air flow in the secondary air intake assembly is divided into two channels. By measuring the flow coefficient data of the air inlet holes on the support seat, the precise mass flow data of the initial cooling air film and the cooling holes on the test plate can be obtained respectively;

[0050] 4) The test device is provided with an initial cooling airflow channel. The initial cooling airflow passes through the slot formed between the cooling fins and the test plate to form a cooling air film attached to the wall, simulating the flow state of the real mainstream in the flame tube as much as possible;

[0051] 5) The test device is provided with a lead mounting seat. While the infrared thermal imager is measuring the wall temperature of the test plate, the wall temperature of the test plate can also be measured by a thermocouple, which is convenient for real-time verification of the wall temperature data measured by the infrared thermal imager to ensure the accuracy of the wall temperature measured by the infrared thermal imager.

[0052] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A schematic diagram of the structure of a test device according to an embodiment of the present invention is shown;

[0055] Figure 2 Shows Figure 1 Enlarged view of point A in the middle;

[0056] Figure 3 Shown along Figure 1 Sectional view along the mid-SS line.

[0057] Reference numerals: 1, mainstream air intake assembly; 101, flange 1; 102, air intake cylinder; 103, total pressure and total temperature measuring seat 1; 104, flange 2; 105, static pressure nozzle 1; 106, flange boss; 107, head air intake hole;

[0058] 2. Exhaust assembly; 201. Exhaust cylinder; 202. Flange three; 203. Flange four; 204. Total pressure and total temperature measuring seat two; 205. Static pressure nozzle two;

[0059] 3. Secondary air intake assembly; 301. Flange five; 302. Rectangular cylinder; 303. Bottom cover plate; 304. Air duct; 305. Flange six; 306. Lead wire mounting seat; 307. Static pressure nozzle three;

[0060] 4. Test receiver; 401. Opening 1; 402. Opening 2; 403. Opening 3; 404. Opening 4; 405. Opening 5; 406. Opening 6; 407. First groove;

[0061] 5. Support seat; 501. Test board mounting surface; 502. Support seat mounting surface; 503. Air vent;

[0062] 6. Test board;

[0063] 7. vortex finder mounting seat; 701. vortex finder mounting hole; 702. second groove;

[0064] 8. Vortex flow device;

[0065] 9. Cooling fins;

[0066] 10. Glass;

[0067] 11. Cover plate;

[0068] 12. Blocking plate. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] like Figure 1 As shown, the present invention proposes a test device for measuring the cooling hole of the flame tube, comprising:

[0071] Components including a mainstream air intake assembly 1, an exhaust assembly 2, a secondary air intake assembly 3, a test casing 4, a support seat 5, a test plate 6, a vortex finder mounting seat 7, a vortex finder 8, a cooling fin 9, a glass 10, a cover plate 11 and a blocking plate 12;

[0072] The mainstream air intake assembly 1 is mounted on the left mounting surface of the test casing 4 by means of bolts;

[0073] The exhaust assembly 2 is mounted on the right mounting surface of the test casing 4 by means of bolts;

[0074] The support seat 5 is mounted on the lower mounting surface of the test casing 4 by bolts;

[0075] The secondary air intake assembly 3 is installed below the support seat 5 by means of bolts; the secondary air intake assembly 3, the support seat 5 and the test casing 4 are connected by means of bolts.

[0076] like Figure 2As shown, the vortex finder 8 is installed on the vortex finder mounting seat 7, and the vortex finder mounting seat 7 is installed on the outer side of the flange 2 104 of the mainstream air intake assembly 1 by screws; the vortex finder mounting seat 7 is a rectangular structure, with bolt holes arranged around it, and a plurality of threaded vortex finder mounting holes 701 arranged in the middle for mounting the vortex finder 8, and a second groove 702 is arranged on the upper side for guiding the head cooling air to close to the wall surface to prevent the airflow from entering the test casing 4 and destroying the rotating airflow; the vortex finder 8 rotates the airflow, generates a high-speed rotating jet in the head area of ​​the flame tube, thereby forming a reflow zone, and the vortex finder 8 is provided with a thread to cooperate with the vortex finder mounting hole 701 on the vortex finder mounting seat 7;

[0077] The cooling fin 9 is a straight-section sheet structure. The cooling fin 9 is installed on the vortex finder mounting seat 7 by screws. The cooling fin 9, the vortex finder mounting seat 7 and the mainstream air intake assembly 1 are connected by screws. After the cooling fin 9 is installed, a slot of a certain height W is formed with the test plate 6. The value range of W is 1.5mm to 2mm. After the initial cooling airflow passes through the slot, a cooling air film attached to the wall is formed to simulate the initial cooling air film at the starting end of the real flame tube.

[0078] The test plate 6 is a square plate structure with bolt holes arranged around it, and is mounted on the support seat 5 by screws, and is located between the test casing 4 and the secondary air intake assembly 3; a cooling hole is arranged in the middle of the test plate 6, and the cooling hole is the object to be tested;

[0079] The glass 10 is mounted on the test case 4;

[0080] The cover plate 11 is installed on the test casing 4 by screws, and the glass 10 or the plugging plate 12 is installed in the first grooves 407 on the front and rear sides. The glass 10 is installed when the flow field test is carried out, and the plugging plate 12 is installed when the cooling effect test is carried out. The cover plate 11 is fixed to the test casing 4 with screws on the outside of the glass 10 or the plugging plate 12.

[0081] The test device is used to measure the flow field characteristics and cooling efficiency of the flame tube cooling holes. Combining the two test functions into one greatly reduces the processing cost of the test transition section and the complexity of the test process. Although the test device of the present invention is exemplified by measuring the flow field characteristics and cooling efficiency of the flame tube cooling holes, the present invention is not limited to this, and it can also measure other properties of the flame tube cooling holes. Those skilled in the art can make comprehensive considerations based on the structure of the present invention and the actual application, as long as the principle of the present invention can be implemented.

[0082] The mainstream air intake assembly 1 includes a flange 101, an air intake cylinder 102, a total pressure and total temperature measuring seat 103, a flange 2 104, a static pressure nozzle 105, a flange boss 106 and a head air intake hole 107;

[0083] The mainstream air intake assembly 1 is a rectangular channel structure with openings at both ends; bolt holes are arranged around flange 101 for connecting with the vehicle platform air intake section; bolt holes are arranged around flange 2 104 for connecting with the test casing 4; Figure 2 As shown, the flange boss 106 of the flange 104 is provided with a threaded hole for connecting with the vortex finder mounting seat 7; the upper side of the flange boss 106 is provided with a head air inlet hole 107, which is an air inlet channel for simulating the cooling air of the flame tube head; the same section of the air inlet cylinder body 102 is provided with a total pressure and total temperature measuring seat 103 and a static pressure nozzle 105, which are used to measure the pressure and temperature at the mainstream air inlet position. The test device is provided with a vortex finder 8 and a head air inlet hole 107 to simulate the flow state of the real mainstream swirl in the flame tube as much as possible.

[0084] The exhaust assembly 2 includes an exhaust cylinder 201, a flange 3 202, a flange 4 203, a total pressure and total temperature measuring seat 204 and a static pressure nozzle 205;

[0085] The exhaust assembly 2 is a rectangular channel structure with openings at both ends; bolt holes are arranged around flange three 202 and flange four 203, the bolt holes on flange three 202 are used to connect with the test casing 4, and the bolt holes on flange four 203 are used to connect with the vehicle platform exhaust section; the total pressure and total temperature measuring seat two 204 and static pressure nozzle two 205 are arranged on the same section of the exhaust cylinder body 201, which are used to monitor the temperature and pressure at the mainstream outlet position.

[0086] The secondary air intake assembly 3 includes a flange 5 301, a rectangular cylinder 302, a bottom cover 303, an air duct 304, a flange 6 305, a lead wire mounting seat 306 and a static pressure nozzle 3 307;

[0087] The secondary flow air intake assembly 3 is a cylindrical structure, provided with an air intake end and an exhaust end; bolt holes are arranged around flange five 301 for connecting with the support seat 5 and the test casing; the bottom cover plate 303 is arranged at the bottom of the rectangular cylinder 302; the air duct 304 is arranged on one side of the rectangular cylinder 302; flange six 305 is arranged at the inlet of the air duct 304, and bolt holes are arranged around flange six 305 for connecting with the air intake section of the vehicle platform; the lead wire mounting seat 306 is arranged on one side of the rectangular cylinder 302, for leading out the thermocouple wire welded on the test plate 6, while ensuring sealing; a static pressure nozzle three 307 is arranged on the side of the rectangular cylinder 302 for monitoring the pressure at the secondary flow inlet position.

[0088] The test device is provided with a lead mounting seat 306. When the infrared thermal imager is used to measure the wall temperature of the test plate 6, the wall temperature of the test plate 6 can also be measured by a thermocouple, so as to facilitate real-time verification of the wall temperature data measured by the infrared thermal imager to ensure the accuracy of the wall temperature measured by the infrared thermal imager.

[0089] The test device can be equipped with mass flow meters in front of the mainstream air intake component 1 and behind the secondary air intake component 3 respectively. At the same time, the air flow in the secondary air intake component 3 is divided into two channels. By measuring the flow coefficient data of the air inlet holes 503 on the support seat 5, the precise mass flow data of the initial cooling air film and the cooling holes on the test plate 6 can be obtained respectively.

[0090] like Figure 1 As shown, the test casing 4 is provided with openings on the six sides of left, right, top, bottom, front and rear, which are opening one 401, opening two 402, opening three 403, opening four 404, opening five 405, opening six 406 and the first groove 407;

[0091] The test case 4 is a rectangular structure; threaded holes are provided at the mounting edges of the six opening positions, the first opening 401 is connected to the mainstream air intake assembly 1; the second opening 402 is connected to the exhaust assembly 2; the third opening 403 is used to install the glass 10; the fourth opening 404 is connected to the support seat 5 and the secondary air intake assembly 3; Figure 3 As shown, the fifth opening 405 and the sixth opening 406 are used to install the glass 10 or the blocking plate 12. The glass 10 or the blocking plate 12 is installed in the first groove 407 and fixed by screws with the cover plate 11. Rubber or asbestos pads are provided on the upper and lower sides of the glass 10 to seal and protect the glass 10. Sealing pads are provided on the mating surfaces of all connection parts to ensure the sealing of the test transition section.

[0092] The support base 5 includes a boss structure and an air inlet 503;

[0093] The support seat 5 is a hollow rectangular structure; the air bleed hole 503 is arranged on one side of the support seat 5, and is connected to the slot between the cooling plate 9 and the test plate 6, so as to provide a channel for the initial cooling airflow. The initial cooling air film is fed through the air bleed hole 503 on the support seat 5 to prevent the cooling airflow from being heated, so as to simulate the real state of the wall of the flame tube. The mass flow rate of the initial cooling air film is obtained by converting the flow coefficient data of the air bleed hole 503 and the actual measured pressure;

[0094] The boss structure includes two mounting surfaces, namely an outer test plate mounting surface 501 and an inner support seat mounting surface 502; the test plate mounting surface 501 is higher than the support seat mounting surface 502; the test plate mounting surface 501 is provided with threaded holes around it for mounting the test plate 6; the support seat mounting surface 502 is provided with bolt holes around it for connecting and fixing with the test casing 4 and the secondary air intake assembly 3.

[0095] The air flow path of the test device is as follows Figure 1As shown by the middle arrow, the mainstream high-temperature airflow enters the air intake cylinder 102 from the flange 101 in the mainstream air intake assembly 1, and most of the air enters the test casing 4 through the vortex finder 8 and forms a rotating airflow to simulate the head recirculation area in the real flame tube. The remaining small part of the air enters the test casing 4 through the head air intake hole 107 on the flange 2 104 to simulate the cooling air intake of the flame tube head. The secondary air enters the rectangular cylinder 302 through the flange 6 305 in the secondary air intake assembly 3, and then is divided into two streams. One stream enters the cavity formed by the cooling plate 9 and the test plate 6 through the air inlet hole 503 on the support seat 5, and then forms a cooling air film close to the test plate 6 after passing through the slit to simulate the starting cooling air film at the starting position of the inner and outer ring walls in the real flame tube; the other part of the air enters the test casing 4 through the cooling holes on the test plate 6, and multiple air streams converge in the test casing 4 and flow out from the outlet of the exhaust assembly 2 after being unified. The mainstream refers to the airflow inside the flame tube, and the secondary flow refers to the airflow between the flame tube and the combustion chamber casing.

[0096] Before the test, the flow coefficient of the air bleed hole 503 on the support seat 5 needs to be measured using the test device. The method is to block the cooling hole on the test plate 6 under the condition of mainstream air supply, and at the same time supply the secondary flow, and measure the secondary flow rate under different secondary flow inlet pressure parameters. After completing this step, when conducting the flame tube cooling hole flow field test and cooling effect test, the mass flow rate of the initial cooling air film can be converted by the air bleed hole flow coefficient data and the actual measured secondary flow inlet pressure. The mass flow rate of the cooling hole is the difference between the secondary flow rate and the initial cooling air film flow rate.

[0097] Flow field characteristic test: The main air intake assembly 1 and the secondary air intake assembly 3 are simultaneously supplied with airflows of corresponding working conditions and containing tracer particles. Light is projected through three glasses 10 installed on the test casing 4. The flow field characteristics inside the test casing 4 and at the cooling hole outlet can be obtained by photographing with a camera at the outlet of the exhaust assembly 2 or other glasses 10.

[0098] Cooling efficiency test: The main air intake assembly 1 and the secondary air intake assembly 3 are simultaneously supplied with airflows of corresponding working conditions, and the temperature of the wall of the test plate 6 is measured through the upper glass 10 using an infrared thermal imager. A thermocouple can also be welded on the test plate 6 at the same time, and the data measured by the infrared thermal imager is verified according to the data measured by the thermocouple, thereby obtaining the precise wall temperature data of the test plate 6, and then the cooling efficiency under various working conditions can be obtained through calculation by formula.

[0099] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test device for measuring flame tube cooling holes, characterized in that: include: A main air intake assembly (1), an exhaust assembly (2), a secondary air intake assembly (3), a test casing (4), a support base (5), a test plate (6) and a cooling fin (9); The mainstream air intake assembly (1) is mounted on the test casing (4) by means of bolts; The exhaust assembly (2) is mounted on the test casing (4) by means of bolts; The support seat (5) is mounted on the test casing (4) by means of bolts; The secondary air intake assembly (3) is mounted on one side of the support seat (5) by means of bolts; A cooling hole is provided in the middle of the test plate (6); The test plate (6) is mounted on the support base (5) by means of screws; The cooling fin (9) is connected to the mainstream air intake assembly (1) via screws; A slot is formed between the cooling fin (9) and the test plate (6), and the height of the slot is 1.5 mm to 2 mm; The secondary air intake assembly (3) comprises a flange five (301), a rectangular cylinder (302), a bottom cover plate (303), an air duct (304), a flange six (305), a lead wire mounting seat (306) and a static pressure nozzle three (307); The secondary air intake assembly (3) is a cylindrical structure, provided with an air intake end and an air exhaust end; Bolt holes are arranged around the flange 5 (301); The bottom cover plate (303) is arranged at the bottom of the rectangular cylinder (302); The air duct (304) is arranged on one side of the rectangular cylinder (302); The flange six (305) is arranged at the inlet of the air duct (304), and bolt holes are arranged around the flange six (305) for connecting with the air inlet section of the vehicle platform; The lead wire mounting seat (306) is arranged on one side of the rectangular cylinder (302); A static pressure nozzle 3 (307) is provided on the side of the rectangular cylinder (302) for monitoring the pressure at the secondary flow inlet position; The support seat (5) comprises a boss structure and an air inlet hole (503); The support seat (5) is a hollow rectangular structure; The air inlet hole (503) is arranged on one side of the support seat (5) and is used to provide a channel for the initial cooling air flow.

2. The test device for measuring the cooling holes of the flame tube according to claim 1, characterized in that: Also includes: A vortex finder mounting seat (7) and a vortex finder (8); The vortex finder mounting seat (7) is a rectangular structure, with a vortex finder mounting hole (701) arranged in the middle and a second groove (702) arranged on the upper side; The vortex finder (8) is mounted on a vortex finder mounting seat (7); the vortex finder mounting seat (7) is mounted on the mainstream air intake assembly (1) by means of screws.

3. The test device for measuring the cooling holes of the flame tube according to claim 2, characterized in that: The cooling fin (9) is a straight-section fin structure; The cooling fin (9) is mounted on the vortex finder mounting seat (7) by means of screws.

4. The test device for measuring the cooling holes of the flame tube according to claim 1 or 2, characterized in that: Also includes: Glass (10) and cover plate (11); The test plate (6) is a plate-like structure with bolt holes arranged around it; The glass (10) is mounted on the test case (4); The cover plate (11) is mounted on the test casing (4) by means of screws.

5. The test device for measuring the cooling holes of the flame tube according to claim 2, characterized in that: The mainstream air intake assembly (1) comprises a flange 1 (101), an air intake cylinder (102), a total pressure and total temperature measuring seat 1 (103), a flange 2 (104), a static pressure nozzle 1 (105), a flange boss (106) and a head air intake hole (107); The mainstream air intake assembly (1) is a rectangular channel structure with openings at both ends; Bolt holes are arranged around the flange 1 (101) for connecting with the air intake section of the vehicle platform; Bolt holes are arranged around the flange 2 (104) for connecting with the test casing (4); threaded holes are arranged on the flange boss (106) of the flange 2 (104) for connecting with the vortex finder mounting seat (7); and a head air inlet hole (107) is arranged on the upper side of the flange boss (106); The air inlet cylinder (102) is provided with a total pressure and total temperature measuring seat (103) and a static pressure nozzle (105) for measuring the pressure and temperature at the mainstream air inlet position.

6. The test device for measuring the cooling holes of the flame tube according to claim 1, characterized in that: The exhaust assembly (2) comprises an exhaust cylinder (201), a flange three (202), a flange four (203), a total pressure and total temperature measuring seat two (204) and a static pressure nozzle two (205); The exhaust component (2) is a rectangular channel structure with openings at both ends; Bolt holes are arranged around the flange three (202) and the flange four (203), the bolt holes on the flange three (202) are used to connect with the test casing (4), and the bolt holes on the flange four (203) are used to connect with the exhaust section of the platform; The exhaust cylinder (201) is provided with a second total pressure and total temperature measuring seat (204) and a second static pressure nozzle (205) for monitoring the temperature and pressure at the main flow outlet position.

7. The test device for measuring the cooling holes of the flame tube according to claim 1, characterized in that: The test casing (4) is provided with an opening 1 (401), an opening 2 (402), an opening 3 (403), an opening 4 (404), an opening 5 (405), an opening 6 (406) and a first groove (407); The test case (4) is a rectangular structure; The opening one (401) is connected to the mainstream air intake assembly (1); the opening two (402) is connected to the exhaust assembly (2); the opening three (403) is used to install the glass (10); the opening four (404) is connected to the support seat (5) and the secondary air intake assembly (3); the opening five (405) and the opening six (406) are used to install the glass (10) or the blocking plate (12).

8. The test device for measuring the cooling holes of the flame tube according to claim 4, characterized in that: The boss structure comprises a test plate mounting surface (501) and a support seat mounting surface (502); the test plate mounting surface (501) is higher than the support seat mounting surface (502); threaded holes are arranged around the test plate mounting surface (501) for mounting the test plate (6); bolt holes are arranged around the support seat mounting surface (502) for connecting and fixing with the test casing (4) and the secondary air intake assembly (3).

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