A multi-pass inlet wind tunnel test device and method of use thereof

Abstract

The present application belongs to the technical field of high-speed wind tunnel test, and discloses a multi-channel inlet wind tunnel test device and a use method thereof.The model, the measuring section, the adapter section and the flowmeter of the multi-channel inlet wind tunnel test device are sequentially connected from front to back, and the lower base, the lower hoop, the flowmeter, the upper hoop, the transition plate and the upper base are sequentially connected from bottom to top; the form of "tail support + inclined back support" is adopted, the longitudinal bearing capacity of the support system is improved, and the model shaking problem is effectively solved; the telescopic pull rod has variable length, and the versatility of the support system is expanded; the "groove + variable angle block" mode is adopted to change the model side slip angle, the lateral bearing capacity of the support system and the side slip angle positioning precision are improved; the flowmeter is installed and positioned through the hoop form, and the problem of difficult installation and positioning of the large flowmeter in the curved knife support is solved. The use method includes an installation method, a side slip angle adjustment method and a telescopic pull rod adjustment method, each method is simple, easy to operate and high in efficiency.

Description

Technical Field

[0001] This invention belongs to the field of high-speed wind tunnel testing technology, specifically relating to a multi-channel air intake wind tunnel testing device and its usage method. Background Technology

[0002] Air intakes are an important component of aircraft, responsible for providing high-quality air to the engines. The design level of air intakes not only affects the performance of engines to a certain extent, but also affects the improvement of the aircraft's technical and tactical capabilities.

[0003] With the advancement of science and technology, aircraft have entered a period of rapid development. Some types of high-speed aircraft have already progressed from single-engine and twin-engine configurations to three-engine and four-engine multi-engine (multi-aisle) configurations, and may even develop to five or more engines in the future. Multi-aisle aircraft have improved payload capacity and cruise radius. Multi-aisle aircraft are relatively large in size and mainly adopt flying wing or flying wing-like aerodynamic schemes with high lift-to-drag ratios.

[0004] High-speed wind tunnel testing is the most direct and reliable technical means to obtain inlet performance parameters. In the existing layout design of high-speed wind tunnel inlet test equipment, flow meters are installed in the supersonic wind tunnel over-expansion section, the sump chamber, or even outside the tunnel. Due to the long pipe length, there is a significant pipe effect, which has a certain impact on the accuracy of inlet wind tunnel test data.

[0005] Due to the relatively small size of conventionally designed single-engine and twin-engine aircraft, a one-meter-class high-speed wind tunnel can generally meet the testing requirements. The aerodynamic load on the inlet model of a one-meter-class high-speed wind tunnel is relatively small, and the support method and sideslip angle positioning method are relatively simple. The load-bearing capacity requirements for the support system and sideslip angle positioning blocks are not high, making support relatively easy. Individual tail supports, back supports, or belly supports can be used for model support. The flow meter is small and lightweight, and its installation position is relatively easy to adjust. It can be installed on the central support of the wind tunnel using simple lug or sleeve forms. The flow meter is relatively close to the inlet model, resulting in relatively good test data quality.

[0006] For newly developed three-engine and four-engine aircraft, due to their relatively large aerodynamic shape and complex intake and exhaust systems, there may be a scaling effect. One-meter-class high-speed wind tunnels are no longer sufficient to meet simulation requirements; intake duct model wind tunnel tests must be conducted in two-meter-class high-speed wind tunnels. In a two-meter-class high-speed wind tunnel, the aerodynamic load on the model increases significantly, especially under supersonic conditions. During wind tunnel startup and shutdown, the model experiences exponentially increasing impact loads in both the longitudinal and lateral directions, placing stringent demands on the longitudinal and lateral load-bearing capacity of the intake duct test equipment. Simultaneously, the model experiences severe vibrations, which can easily lead to safety accidents. Furthermore, two-meter-class high-speed wind tunnel flowmeters are relatively expensive to manufacture, large in size, and use lug-type connections, limiting their versatility. The flowmeters are also heavy, requiring sleeve-type connections, making fitting clearances and installation positioning relatively difficult. It is also necessary to minimize the distance between the intake duct model and the flowmeter to reduce pipe effects and improve the quality of experimental data.

[0007] Currently, existing inlet wind tunnel test equipment is mainly designed for single-engine and twin-engine aircraft, and its load-bearing capacity is relatively limited. Although some high-speed wind tunnels have developed three-engine or four-engine inlet test equipment, the flow meter is installed in the wind tunnel over-expansion section, which is far from the model outlet, resulting in a large pipe effect.

[0008] Therefore, in order to adapt to the rapid development of aircraft, there is an urgent need to develop a multi-channel air intake wind tunnel test device with high load-bearing capacity, convenient positioning and strong versatility, as well as to develop the corresponding usage method of the multi-channel air intake wind tunnel test device. Summary of the Invention

[0009] One technical problem to be solved by the present invention is to provide a multi-channel air intake wind tunnel testing device, and another technical problem to be solved by the present invention is to provide a method of using the multi-channel air intake wind tunnel testing device.

[0010] The multi-channel air intake wind tunnel test device of the present invention is characterized in that the multi-channel air intake wind tunnel test device includes a model, a measurement section, a transition section, a flow meter, a lower clamp, a lower base, a lower angle block, a lower lug, an upper clamp, a transition plate, an upper base, an upper angle block, an upper lug, a telescopic tie rod base, a telescopic tie rod, and a model connecting block.

[0011] The model, measuring section, transition section, and flow meter are connected sequentially from front to back, while the lower base, lower clamp, flow meter, upper clamp, transition plate, and upper base are connected sequentially from bottom to top. The flow meter is installed between the lower clamp and the upper clamp, and the diameters of the lower clamp and the upper clamp match the diameter of the flow meter. There is a gap of 0.5mm to 1mm between the lower clamp and the upper clamp. The lower clamp and the upper clamp are connected and positioned by screws and pins. A semi-circular retaining ring is provided at the bottom of the lower clamp, while the upper clamp does not have a semi-circular retaining ring. The semi-circular retaining ring at the bottom of the lower clamp serves as a rearward limit for the flow meter.

[0012] The model connecting block is fixed to the upper surface of the model, the telescopic tie rod base is fixed to the front end of the upper base, the front end of the telescopic tie rod is connected to the model connecting block, and the rear end of the telescopic tie rod is connected to the telescopic tie rod base.

[0013] The components are connected and positioned by screws and pins to form the overall test device; the overall test device is fixed to the upper curved blade of the wind tunnel angle of attack mechanism by the upper lug and to the lower curved blade of the wind tunnel angle of attack mechanism by the lower lug, thus fixing the overall test device in the wind tunnel test section.

[0014] Rotating shafts are respectively set between the lower base and the lower ear piece, and between the upper base and the upper ear piece. The entire test device rotates around the rotating shafts to change the side slip angle of the model. The lower and upper variable angle blocks, which are in the shape of an "L", are installed in the through grooves of the lower and upper bases respectively. The lower variable angle block is fixed to the lower base and the lower ear piece by screws and pins, and the upper variable angle block is fixed to the upper base and the upper ear piece by screws and pins to achieve the positioning of the side slip angle.

[0015] Furthermore, the telescopic rod is a screw and pipe thread assembly. The length of the telescopic rod can be adjusted and tightened as needed until the multi-channel air intake wind tunnel test device forms a stable force triangle.

[0016] Furthermore, the main body of the telescopic pull rod is a tube. The front end of the tube is provided with a positive internal thread, which is connected to a positive external thread pull rod and tightened by a positive internal thread tightening nut. The rear end of the tube is provided with a reverse internal thread, which is connected to a reverse external thread pull rod and tightened by a reverse internal thread tightening nut.

[0017] The length of the telescopic rod is adjusted by rotating the forward and reverse external threaded rods relative to the pipe body. After adjustment, the forward and reverse internal threaded tensioning nuts are tightened to lock the length of the telescopic rod.

[0018] Furthermore, the horizontal side of the lower corner block is positioned in conjunction with the through groove of the lower base, and the vertical side is positioned in conjunction with the vertical surface of the lower ear piece; the horizontal side of the upper corner block is positioned in conjunction with the through groove of the upper base, and the vertical side is positioned in conjunction with the vertical surface of the upper ear piece.

[0019] Furthermore, the lower base and the upper base are symmetrical, and by interchangeing the lower base and the upper base, the model can be switched between the tail support and diagonal back support method and the tail support and diagonal web support method.

[0020] Furthermore, the lower angle block is a group of lower angle blocks with a series of angles, and the upper angle block is a group of upper angle blocks with a series of angles that correspond one-to-one with the lower angle block group.

[0021] Furthermore, the multi-channel air intake wind tunnel test device has several air intakes, each air intake consisting of a measuring section, a transition section, and a flow meter connected sequentially from front to back, with the flow meter mounted between the lower clamp and the upper clamp; the lower base, lower clamp, flow meter, upper clamp, transition plate, and upper base are fixedly connected by screws in a bottom-to-top order.

[0022] The method of using the multi-channel air intake wind tunnel test device of the present invention includes an installation method, a side slip angle adjustment method, and a telescopic rod adjustment method;

[0023] S10. Installation method;

[0024] S11. Fix the lower ear plate to the lower curved blade of the wind tunnel angle of attack mechanism, and then connect and install them in the following order: lower ear plate, lower angle block, lower base, lower clamp, flow meter, upper clamp, transition plate, upper base, upper ear plate and upper angle block. Fix the upper ear plate to the upper curved blade of the wind tunnel angle of attack mechanism.

[0025] S12. Install from back to front in the order of transition section, measurement section, and model;

[0026] S13. Install the telescopic tie rod base at the front end of the upper base, and install the model connecting block on the upper surface of the model;

[0027] S14. Adjust the length of the telescopic rod according to the actual side length of the force triangle, and connect the front end of the telescopic rod to the model connecting block and the rear end of the telescopic rod to the telescopic rod base through pins. Finally, tighten the positive internal thread tension nut and the negative internal thread tension nut respectively to lock the length of the telescopic rod.

[0028] S20. Sideslip angle adjustment method;

[0029] S21. Remove the original upper and lower corner blocks;

[0030] S22. Rotate the entire test device around the pivot to the predetermined side-slip angle position;

[0031] S23. Install the upper variable angle block with the intended pre-biased side slip angle between the upper base and the upper ear piece, and install the lower variable angle block between the lower ear piece and the lower base;

[0032] S24. Fix the upper base, upper variable angle block and upper ear piece with screws and pins, connect and position the lower ear piece, lower variable angle block and lower base to complete the side sliding angle adjustment;

[0033] S30. Adjustment method for telescopic rod;

[0034] S31. Connect the rear end of the telescopic rod to the telescopic rod base using pins or bolts;

[0035] S32 places the telescopic tie rod along the direction from the telescopic tie rod base to the model connection block;

[0036] S33. Rotate the tube of the telescopic rod to adjust the length of the telescopic rod until the front end of the telescopic rod reaches the position to connect with the model connection block;

[0037] S34. Connect the front end of the telescopic rod to the model connecting block using pins or bolts;

[0038] S35. Finally, tighten the positive internal thread tension nut and the negative internal thread tension nut to lock the length of the telescopic rod.

[0039] The multi-channel air intake wind tunnel test device of the present invention has the following characteristics:

[0040] a. It adopts a split and symmetrical design, with a reasonable layout and simple structure, which improves the scalability and versatility of the multi-channel air intake wind tunnel test device; by designing the number of upper and lower clamps to match the number of channels, the number of channels can be effectively expanded; by symmetrically interchangeable lower and upper bases, a composite form of "tail support + diagonal brace" can be achieved.

[0041] b. The use of a "tail support + diagonal brace" composite method forms a stable force triangle for the entire air intake wind tunnel test device, which improves the longitudinal bearing capacity of the air intake wind tunnel test device and effectively solves the model vibration problem.

[0042] c. The "through groove + variable corner block (long L-shaped)" variable side sliding angle method is adopted, which has more mating surfaces and improves the lateral load-bearing capacity and side sliding angle positioning accuracy of the support system; the variable corner block realizes the side sliding angle positioning and also realizes the connection between the base and the lug.

[0043] d. The use of clamps for installation and positioning of the flow meter solves the problem of difficult installation and positioning of large flow meters in the curved support during wind tunnel testing; the bottom of the lower clamp is equipped with a semi-circular retaining ring to achieve rearward limiting of the flow meter, while the upper clamp does not have a semi-circular retaining ring to avoid interference problems during installation;

[0044] e. The telescopic rod uses an adjustable length screw and pipe thread assembly, which can adjust and lock the length of the telescopic rod according to the actual side length of the triangle, thus improving the applicability of the telescopic rod.

[0045] In summary, the multi-channel inlet wind tunnel testing device of this invention adopts a split and symmetrical design. It uses a composite structure of "tail support + telescopic tie rod" to support the model, and a "groove + variable angle block (long L-shaped)" method to achieve varying side-slip angles. Flow meters are installed and positioned using clamps. The composite support improves the rigidity and strength of the support system while effectively preventing model vibration. The telescopic tie rod has a variable length function, improving the device's scalability and versatility. The "through groove + variable angle block (long L-shaped)" method for varying side-slip angles improves the lateral load-bearing capacity and side-slip angle positioning accuracy of the support system. The clamp method solves the problem of difficult installation and positioning of large flow meters in curved support brackets during wind tunnel testing. This multi-channel inlet wind tunnel testing device is applicable to the support of other wind tunnel test models and can also be extended to the field of industrial equipment installation.

[0046] The multi-channel air intake wind tunnel test device of the present invention includes an installation method, a side slip angle adjustment method, and a telescopic rod adjustment method. Each method is simple, easy to operate, and highly efficient. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the multi-channel air intake wind tunnel test device of the present invention.

[0048] In the diagram, 1. Model; 2. Measuring section; 3. Transition section; 4. Flow meter; 5. Lower clamp; 6. Lower base; 7. Lower angle block; 8. Lower lug; 9. Upper clamp; 10. Transition plate; 11. Upper base; 12. Upper angle block; 13. Upper lug; 14. Telescopic rod base; 15. Telescopic rod; 16. Model connecting block. Detailed Implementation

[0049] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] Example 1:

[0051] This embodiment has three channels, and the test wind tunnel is the two-meter supersonic wind tunnel of the China Aerodynamics Research and Development Center.

[0052] like Figure 1As shown, the multi-channel air intake wind tunnel test device of this embodiment includes a model 1, a measuring section 2, a transition section 3, a flow meter 4, a lower clamp 5, a lower base 6, a lower variable angle block 7, a lower lug 8, an upper clamp 9, a transition plate 10, an upper base 11, an upper variable angle block 12, an upper lug 13, a telescopic rod base 14, a telescopic rod 15, and a model connecting block 16;

[0053] Model 1, measuring section 2, transition section 3, and flow meter 4 are connected sequentially from front to back. Lower base 6, lower clamp 5, flow meter 4, upper clamp 9, transition plate 10, and upper base 11 are connected sequentially from bottom to top. Flow meter 4 is installed between lower clamp 5 and upper clamp 9. The diameters of lower clamp 5 and upper clamp 9 match the diameter of flow meter 4, and there is a gap of 0.5mm to 1mm between lower clamp 5 and upper clamp 9. Lower clamp 5 and upper clamp 9 are connected and positioned by screws and pins. A semi-annular retaining ring is provided at the bottom of lower clamp 5, while upper clamp 9 does not have a semi-annular retaining ring. The semi-annular retaining ring at the bottom of lower clamp 5 serves as a rearward limit for flow meter 4.

[0054] Model connecting block 16 is fixed to the upper surface of model 1, telescopic rod base 14 is fixed to the front end of upper base 11, the front end of telescopic rod 15 is connected to model connecting block 16, and the rear end of telescopic rod 15 is connected to telescopic rod base 14.

[0055] The components are connected and positioned by screws and pins to form an integral test device. The integral test device is fixed to the upper curved blade of the wind tunnel angle of attack mechanism by the upper lug 13 and to the lower curved blade of the wind tunnel angle of attack mechanism by the lower lug 8, thus fixing the integral test device in the wind tunnel test section.

[0056] A rotating shaft is provided between the lower base 6 and the lower ear piece 8, and between the upper base 11 and the upper ear piece 13. The entire test device rotates around the rotating shaft to change the side slip angle of model 1. The lower variable angle block 7 and the upper variable angle block 12, which are in the shape of an "L-shape", are installed in the through groove of the lower base 6 and the upper base 11 respectively. The lower variable angle block 7 is fixed to the lower base 6 and the lower ear piece 8 by screws and pins, and the upper variable angle block 12 is fixed to the upper base 11 and the upper ear piece 13 by screws and pins to achieve the positioning of the side slip angle.

[0057] Furthermore, the telescopic rod 15 is a screw and pipe thread assembly. The length of the telescopic rod 15 can be adjusted and tightened as needed until the multi-channel air intake wind tunnel test device forms a stable force triangle.

[0058] Furthermore, the main body of the telescopic pull rod 15 is a tube. The front end of the tube is provided with a positive internal thread, which is connected to a positive external thread pull rod and tightened by a positive internal thread tightening nut. The rear end of the tube is provided with a reverse internal thread, which is connected to a reverse external thread pull rod and tightened by a reverse internal thread tightening nut.

[0059] Adjust the length of the telescopic rod 15 by rotating the positive external thread tie rod, the negative external thread tie rod and the pipe body relative to each other. After adjustment, tighten the positive internal thread tension nut and the negative internal thread tension nut to lock the length of the telescopic rod 15.

[0060] Furthermore, the horizontal side of the lower corner block 7 is positioned in conjunction with the through groove of the lower base 6, and the vertical side is positioned in conjunction with the vertical surface of the lower ear piece 8; the horizontal side of the upper corner block 12 is positioned in conjunction with the through groove of the upper base 11, and the vertical side is positioned in conjunction with the vertical surface of the upper ear piece 13.

[0061] Furthermore, the lower base 6 and the upper base 11 are symmetrical, and by interchangeing the lower base 6 and the upper base 11, the tail support and diagonal back support method of Model 1 can be converted to the tail support and diagonal web support method.

[0062] Furthermore, the lower angle block 7 is a group of lower angle blocks with a series of angles, and the upper angle block 12 is a group of upper angle blocks with a series of angles that correspond one-to-one with the lower angle block group.

[0063] Furthermore, the multi-channel air intake wind tunnel test device has several air intakes, each air intake consisting of a measuring section 2, a transition section 3, and a flow meter 4 connected sequentially from front to back. The flow meter 4 is mounted between the lower clamp 5 and the upper clamp 9. The lower base 6, lower clamp 5, flow meter 4, upper clamp 9, transition plate 10, and upper base 11 are fixedly connected by screws in a bottom-to-top order.

[0064] The method of using the multi-channel air intake wind tunnel test device in this embodiment includes the installation method, the side slip angle adjustment method, and the telescopic rod adjustment method;

[0065] S10. Installation method;

[0066] S11. Fix the lower ear plate 8 to the lower curved blade of the wind tunnel angle of attack mechanism, and then connect and install them in the following order: lower ear plate 8, lower angle block 7, lower base 6, lower clamp 5, flow meter 4, upper clamp 9, transition plate 10, upper base 11, upper ear plate 13 and upper angle block 12. Fix the upper ear plate 13 to the upper curved blade of the wind tunnel angle of attack mechanism.

[0067] S12. Install from back to front in the order of transition section 3, measurement section 2, and model 1;

[0068] S13. Install the telescopic tie rod base 14 at the front end of the upper base 11, and install the model connecting block 16 on the upper surface of the model 1;

[0069] S14. Adjust the length of the telescopic rod 15 according to the actual side length of the force triangle, and connect the front end of the telescopic rod 15 to the model connecting block 16 and the rear end of the telescopic rod 15 to the telescopic rod base 14 through the pin. Finally, tighten the positive internal thread tension nut and the negative internal thread tension nut respectively to lock the length of the telescopic rod 15.

[0070] S20. Sideslip angle adjustment method;

[0071] S21. Remove the original upper corner block 12 and lower corner block 7;

[0072] S22. Rotate the entire test device around the pivot to the predetermined side-slip angle position;

[0073] S23. Install the upper variable angle block 12 with the intended side slip angle between the upper base 11 and the upper ear piece 13, and install the lower variable angle block 7 between the lower ear piece 8 and the lower base 6;

[0074] S24. Fix the upper base 11, upper angle block 12 and upper ear piece 13 with screws and pins, and connect and position the lower ear piece 8, lower angle block 7 and lower base 6 to complete the side sliding angle adjustment;

[0075] S30. Adjustment method for telescopic rod;

[0076] S31. Connect the rear end of the telescopic rod 15 to the telescopic rod base 14 using a pin or bolt;

[0077] S32 places the telescopic rod 15 along the direction from the telescopic rod base 14 to the model connecting block 16;

[0078] S33. Rotate the tube of the telescopic rod 15 to adjust the length of the telescopic rod 15 until the front end of the telescopic rod 15 reaches the position to connect with the model connecting block 16;

[0079] S34. Connect the front end of the telescopic rod 15 to the model connecting block 16 by means of a pin or bolt;

[0080] S35. Finally, tighten the positive internal thread tension nut and the negative internal thread tension nut to lock the length of the telescopic rod 15.

[0081] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. For those skilled in the art, all features disclosed in this invention, or steps in all disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way without departing from the principles of the invention. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A multi-channel air intake wind tunnel testing device, characterized in that, The multi-channel air intake wind tunnel test device includes a model (1), a measurement section (2), a transition section (3), a flow meter (4), a lower clamp (5), a lower base (6), a lower variable angle block (7), a lower ear plate (8), an upper clamp (9), a transition plate (10), an upper base (11), an upper variable angle block (12), an upper ear plate (13), a telescopic tie rod base (14), a telescopic tie rod (15), and a model connecting block (16). Model (1), measuring section (2), transition section (3) and flow meter (4) are connected sequentially from front to back, and lower base (6), lower clamp (5), flow meter (4), upper clamp (9), transition plate (10) and upper base (11) are connected sequentially from bottom to top; flow meter (4) is installed between lower clamp (5) and upper clamp (9), the diameter of lower clamp (5) and upper clamp (9) matches the diameter of flow meter (4), and there is a gap of 0.5mm to 1mm between lower clamp (5) and upper clamp (9); lower clamp (5) and upper clamp (9) are connected and positioned by screws and pins; a semi-circular retaining ring is provided at the bottom of lower clamp (5), and no semi-circular retaining ring is provided at upper clamp (9), and the semi-circular retaining ring at the bottom of lower clamp (5) realizes the rearward limit of flow meter (4); The model connecting block (16) is fixed on the upper surface of the model (1), the telescopic rod base (14) is fixed on the front end of the upper base (11), the front end of the telescopic rod (15) is connected to the model connecting block (16), and the rear end of the telescopic rod (15) is connected to the telescopic rod base (14). The components are connected and positioned by screws and pins to form an integral test device; the integral test device is fixed to the upper curved blade of the wind tunnel angle of attack mechanism by the upper lug (13) and to the lower curved blade of the wind tunnel angle of attack mechanism by the lower lug (8), thus fixing the integral test device in the wind tunnel test section. A rotating shaft is set between the lower base (6) and the lower ear piece (8) and between the upper base (11) and the upper ear piece (13). The entire test device rotates around the rotating shaft to change the side slip angle of the model (1). The lower variable angle block (7) and the upper variable angle block (12), which are in the shape of a "long L", are installed in the through groove of the lower base (6) and the upper base (11). The lower variable angle block (7) is fixed to the lower base (6) and the lower ear piece (8) by screws and pins, and the upper variable angle block (12) is fixed to the upper base (11) and the upper ear piece (13) by screws and pins to achieve the positioning of the side slip angle. The telescopic rod (15) is a screw and pipe thread assembly. The length of the telescopic rod (15) can be adjusted and tightened as needed until the multi-channel air intake wind tunnel test device forms a stable force triangle. The telescopic pull rod (15) has a tube body as its main body. The front end of the tube body is provided with a positive internal thread. The front end of the tube body is connected to a positive external thread pull rod and is tightened by a positive internal thread tightening nut. The rear end of the tube body is provided with a reverse internal thread. The rear end of the tube body is connected to a reverse external thread pull rod and is tightened by a reverse internal thread tightening nut. Adjust the length of the telescopic rod (15) by rotating the positive external thread tie rod, the negative external thread tie rod and the tube body relative to each other. After adjustment, tighten the positive internal thread tension nut and the negative internal thread tension nut to lock the length of the telescopic rod (15).

2. The multi-channel air intake wind tunnel testing device according to claim 1, characterized in that, The horizontal side of the lower corner block (7) is positioned in conjunction with the through groove of the lower base (6), and the vertical side is positioned in conjunction with the vertical surface of the lower ear piece (8); the horizontal side of the upper corner block (12) is positioned in conjunction with the through groove of the upper base (11), and the vertical side is positioned in conjunction with the vertical surface of the upper ear piece (13).

3. The multi-channel air intake wind tunnel testing device according to claim 1, characterized in that, The lower base (6) and the upper base (11) are symmetrical. By interchange of the lower base (6) and the upper base (11), the tail support and diagonal back support of model (1) can be converted to the tail support and diagonal web support.

4. The multi-channel air intake wind tunnel testing device according to claim 1, characterized in that, The lower angle block (7) is a group of lower angle blocks with a series of angles, and the upper angle block (12) is a group of upper angle blocks with a series of angles that correspond one-to-one with the lower angle block group.

5. The multi-channel air intake wind tunnel testing device according to claim 1, characterized in that, The multi-channel air intake wind tunnel test device has several air intakes. Each air intake is composed of a measuring section (2), a transition section (3), and a flow meter (4) connected sequentially from front to back. The flow meter (4) is mounted between the lower clamp (5) and the upper clamp (9). The lower base (6), lower clamp (5), flow meter (4), upper clamp (9), transition plate (10), and upper base (11) are fixedly connected by screws in a bottom-to-top order.

6. A method of using a multi-channel air intake wind tunnel testing device, which is used in any one of the multi-channel air intake wind tunnel testing devices according to claims 1 to 5, characterized in that, The methods of use include installation, side-slip angle adjustment, and telescopic rod adjustment. S10. Installation method; S11. Fix the lower ear piece (8) to the lower curved blade of the wind tunnel angle of attack mechanism, and then connect and install them in the order of lower ear piece (8), lower angle block (7), lower base (6), lower clamp (5), flow meter (4), upper clamp (9), transition plate (10), upper base (11), upper ear piece (13) and upper angle block (12), and fix the upper ear piece (13) to the upper curved blade of the wind tunnel angle of attack mechanism; S12. Install from back to front in the order of transition section (3), measurement section (2) and model (1); S13. Install the telescopic tie rod base (14) at the front end of the upper base (11) and install the model connecting block (16) on the upper surface of the model (1); S14. Adjust the length of the telescopic rod (15) according to the actual side length of the force triangle, and connect the front end of the telescopic rod (15) to the model connecting block (16) and the rear end of the telescopic rod (15) to the telescopic rod base (14) through the pin. Finally, tighten the positive internal thread tension nut and the negative internal thread tension nut respectively to lock the length of the telescopic rod (15). S20. Sideslip angle adjustment method; S21. Remove the original upper corner block (12) and lower corner block (7); S22. Rotate the entire test device around the pivot to the predetermined side-slip angle position; S23. Install the upper variable angle block (12) of the side slip angle to be pre-deflected between the upper base (11) and the upper ear plate (13), and install the lower variable angle block (7) between the lower ear plate (8) and the lower base (6); S24. Fix the upper base (11), upper variable angle block (12) and upper ear piece (13) with screws and pins, and connect and position the lower ear piece (8), lower variable angle block (7) and lower base (6) to complete the side sliding angle adjustment; S30. Adjustment method for telescopic rod; S31. Connect the rear end of the telescopic rod (15) to the telescopic rod base (14) using a pin or bolt; S32 Place the telescopic rod (15) along the direction from the telescopic rod base (14) to the model connecting block (16); S33. Rotate the tube of the telescopic rod (15) and adjust the length of the telescopic rod (15) until the front end of the telescopic rod (15) reaches the position of connecting with the model connecting block (16); S34. Connect the front end of the telescopic rod (15) to the model connecting block (16) by means of a pin or bolt; S35. Finally, tighten the positive internal thread tension nut and the negative internal thread tension nut to lock the length of the telescopic rod (15).

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