A high-pressure air supply device for jet-controlled wind tunnel testing

Abstract

A high-pressure gas supply device for jet-controlled wind tunnel testing belongs to the field of wind tunnel special testing technology. It solves the problems of large space occupation and significant interference with force balance measurements in existing technologies. Key technical points: The high-pressure gas supply pipeline connects to a high-pressure gas flow control device; the high-pressure gas flow control device, high-pressure gas flow measurement device, and multi-port voltage stabilization and rectification device are sequentially connected via connecting pipelines; the force balance is installed between two gas supply pipeline support frames; a gas supply interference-eliminating pipeline passes through the gas supply pipeline support frame in a curved shape and is positioned outside the force balance without contacting it; one end of the gas supply interference-eliminating pipeline is connected to the multi-port voltage stabilization and rectification device, and the other end is connected to the jet rectification cavity and jet flow field simulation device. This invention adopts the principle of gradual change in flow tube profile, enabling real-time monitoring of the instantaneous flow rate of the high-pressure gas; through special pipeline design, it eliminates the interference of high-pressure gas supply on the force balance.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel special testing technology, specifically a jet-controlled high-pressure air supply device for wind tunnel testing. Background Technology

[0002] Due to their superior aerodynamic performance and excellent stealth capabilities, flying wing aircraft represent the future trend in aircraft development. With advancements in engine technology, jet control is increasingly being employed to enhance handling performance. Jet control experiments offer highly reliable data, based on physical models and real fluid environments. The test results are intuitive and closely reflect actual engineering scenarios. Comprehensive testing standards and equipment exist, with standardized operating procedures and strong repeatability. Furthermore, the interaction between the jet and the mainstream, as well as flow separation, can be directly observed, avoiding simplification errors inherent in numerical simulations.

[0003] In existing technologies, jet control testing is costly, with high expenses for building physical models, renting test equipment, and subsequent maintenance, and long test cycles; it lacks flexibility, as it is difficult to quickly adjust jet parameters once the model is completed, making it unsuitable for various working environments; it is limited by equipment size and power, making it difficult to simulate extreme working conditions; it relies on professional sensors and analysis systems, requiring high skill levels from operators, and data processing is time-consuming; moreover, it often adopts an internal balance plus air bridge structure, which is complex in design, occupies a large internal space of the model, and is not suitable for the limited space of flying wing aircraft.

[0004] Therefore, there is an urgent need to propose a high-pressure air supply device for jet-controlled wind tunnel testing to solve the problems of large space occupation and significant interference with force balance measurements in existing technologies. Summary of the Invention

[0005] In view of the above facts, in order to solve the problems of large space occupation and large interference with force balance measurement in the prior art, the present invention further designed a high-pressure air supply device for jet control wind tunnel test.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-pressure gas supply device for jet control wind tunnel testing includes a high-pressure gas supply pipeline, a high-pressure gas flow control device, a connecting pipeline, a high-pressure gas flow measurement device, a multi-port voltage stabilizing and rectifying device, a jet aerodynamic measurement device, a jet rectification cavity, and a jet flow field simulation device.

[0008] The high-pressure gas supply pipeline is connected to the high-pressure gas flow control device, and the high-pressure gas flow control device, the high-pressure gas flow measurement device, and the multi-interface voltage stabilizing and rectifying device are connected in sequence through the connecting pipeline.

[0009] The jet aerodynamic measurement device includes an air supply disturbance reduction pipeline, a force balance, and an air supply pipeline support frame.

[0010] The force balance is installed between two gas supply pipeline support frames. The gas supply disturbance elimination pipeline passes through the gas supply pipeline support frame and is set in a curved shape on the outside of the force balance, without contacting the force balance.

[0011] One end of the gas supply disturbance elimination pipeline is connected to the multi-port voltage stabilizing and rectifying device, and the other end is connected to the jet rectifier cavity and the jet flow field simulation device.

[0012] The high-pressure gas flow control device includes a housing, a needle valve, a drive motor, a motor control module, and a needle valve position feedback module.

[0013] The needle valve, motor control module, and needle valve position feedback module are housed inside the housing, while the drive motor is mounted on the outer end of the housing.

[0014] The needle valve is housed inside the housing, and the outer end of the housing is connected, from left to right, to the needle valve position feedback module, the drive motor, and the motor control module.

[0015] The high-pressure gas flow measurement device is equipped with a Laval nozzle, and a temperature sensor and a pressure sensor are installed at the throat.

[0016] The multi-interface voltage regulator and rectifier is internally equipped with a damping mesh and a perforated plate.

[0017] The jet rectifier cavity and jet flow field simulation device include a branch gas supply pipeline, a jet rectifier device, and a jet flow field simulation cavity;

[0018] The gas flows from the gas supply and disturbance reduction pipeline to the branch gas supply pipeline, flows into the jet flow field simulation cavity through the jet rectification device, and flows out from the surface of the jet flow field simulation cavity.

[0019] Furthermore: the high-pressure gas supply pipeline is connected to the high-pressure gas flow control device via a flange, and the connecting pipeline is connected to the high-pressure gas flow control device, the high-pressure gas flow measurement device, and the multi-port voltage stabilizing and rectifying device via a flange, and an O-ring is provided at the connection.

[0020] Furthermore: the high-pressure gas supply pipeline is a flexible hose with an inner diameter of 50mm and a pressure resistance of 6Mpa.

[0021] Furthermore, the high-pressure gas flow control device is pressure resistant to 4 MPa.

[0022] Furthermore, the measurement repeatability of the high-pressure gas flow measurement device is 0.5 g / s.

[0023] Furthermore: the multi-interface voltage regulator and rectifier has an inner diameter of 100mm and a length of 500mm;

[0024] The multi-interface voltage regulator and rectifier is 4 MPa resistant.

[0025] Furthermore: the inner diameter of the gas supply disturbance elimination pipeline is 10mm, the pressure resistance is 1.5Mpa, and the bending radius is 5-10 times the inner diameter.

[0026] Furthermore, the surface profile within the jet rectifier adopts a Vickers formula contraction curve.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. This invention adopts the principle of gradual change of flow tube profile, which can monitor the instantaneous flow rate of high-pressure airflow in real time, and accurately control the low-flow high-pressure air supply according to the test requirements, effectively improving the test efficiency. The maximum working pressure of the high-pressure air supply device for jet control wind tunnel test is 1.5 MPa, the flow control range is 0-500 g / s, and the control accuracy is ±0.5 g / s.

[0029] 2. This invention eliminates the interference of high-pressure gas supply on the force balance through the gas supply interference elimination pipeline design, so that the force balance can still maintain a stable measurement state under high-pressure jet conditions.

[0030] 3. This invention significantly reduces the installation space occupied by each component and the redundancy in connection, thereby reducing the difficulty of site planning and installation and commissioning.

[0031] 4. The flow field characteristics of this invention are highly consistent with the jet state in actual engineering scenarios, providing real and reliable flow field conditions for the study of jet control mechanisms and the performance testing of related equipment. Attached Figure Description

[0032] Figure 1 This is a general structural diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the jet aerodynamics measuring device of the present invention;

[0034] Figure 3 This is a schematic diagram of the jet rectifier cavity and jet flow field simulation device of the present invention;

[0035] Figure 4 This is a schematic diagram of the high-pressure gas flow control device of the present invention.

[0036] In the diagram: 1-High-pressure gas supply pipeline, 2-High-pressure gas flow control device, 3-Connecting pipeline, 4-High-pressure gas flow measurement device, 5-Multi-interface voltage stabilizing and rectifying device, 6-Jet aerodynamic measurement device, 7-Jet rectifying cavity and jet flow field simulation device, 8-Gas supply disturbance reduction pipeline, 9-Force balance, 10-Gas supply pipeline support frame, 11-Branch gas supply pipeline, 12-Jet rectifying device, 13-Jet flow field simulation cavity, 14-Needle valve, 15-Drive motor, 16-Motor control module, 17-Needle valve position feedback module, 18-Laval nozzle, 19-Damping mesh, 20-Orifice plate, 21-Shell. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0038] The terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] Example: Reference Figure 1-4 This embodiment describes a high-pressure gas supply device for jet control wind tunnel testing, comprising a high-pressure gas supply pipeline 1, a high-pressure gas flow control device 2, a connecting pipeline 3, a high-pressure gas flow measurement device 4, a multi-port voltage stabilizing and rectifying device 5, a jet aerodynamics measurement device 6, and a jet rectification cavity and jet flow field simulation device 7.

[0042] The high-pressure gas supply pipeline 1 is connected to the high-pressure gas flow control device 2. The high-pressure gas flow control device 2, the high-pressure gas flow measurement device 4, and the multi-interface voltage stabilizing and rectifying device 5 are connected in sequence through the connecting pipeline 3.

[0043] The jet aerodynamic measurement device 6 includes an air supply disturbance elimination pipeline 8, a force balance 9, and an air supply pipeline support frame 10.

[0044] The force balance 9 is installed between two gas supply pipeline support frames 10. The gas supply disturbance elimination pipeline 8 passes through the gas supply pipeline support frame 10 and is set in a curved shape outside the force balance 9, without contacting the force balance 9.

[0045] One end of the gas supply disturbance elimination pipeline 8 is connected to the multi-port voltage stabilizing and rectifying device 5, and the other end is connected to the jet rectifying cavity and jet flow field simulation device 7.

[0046] The high-pressure gas flow control device 2 includes a housing 21, a needle valve 14, a drive motor 15, a motor control module 16, and a needle valve position feedback module 17.

[0047] The needle valve 14 is disposed inside the housing 21, and the needle valve position feedback module 17, drive motor 15, and motor control module 16 are connected sequentially from left to right at the outer end of the housing 21.

[0048] The needle valve position feedback module 17 transmits a signal to the motor control module 16, which remotely controls the drive motor 15. The drive motor 15 drives the needle valve 14, and by changing the flow area of ​​the flow channel, the flow rate of the high-pressure gas supply is adjusted, thereby precisely controlling the jet speed and flow rate of the jet slit.

[0049] The high-pressure gas flow measurement device 4 is equipped with a Laval nozzle 18, and a temperature sensor and a pressure sensor are installed at the throat, which can accurately measure the mass flow rate of the high-pressure gas supply.

[0050] The multi-interface voltage regulator and rectifier 5 is equipped with a damping mesh 19 and an orifice plate 20 to make the uneven flow in the pipeline uniform.

[0051] The jet rectifier cavity and jet flow field simulation device 7 include a branch gas supply pipeline 11, a jet rectifier device 12, and a jet flow field simulation cavity 13;

[0052] Gas flows from the gas supply disturbance elimination pipeline 8 to the branch gas supply pipeline 11, passes through the jet rectification device 12 and flows into the jet flow field simulation cavity 13, and flows out from the surface of the jet flow field simulation cavity 13.

[0053] More specifically: the high-pressure gas supply pipeline 1 is connected to the high-pressure gas flow control device 2 via a flange, and the connecting pipeline 3 is connected to the high-pressure gas flow control device 2, the high-pressure gas flow measurement device 4, and the multi-port voltage stabilizing and rectifying device 5 via a flange. O-rings are provided at the connection points to ensure that no gas leaks at the connection points.

[0054] More specifically: the high-pressure gas supply line 1 is a flexible hose with an inner diameter of 50mm and a pressure resistance of 6Mpa.

[0055] More specifically: the high-pressure gas flow control device 2 is pressure resistant to 4 MPa.

[0056] More specifically: the measurement repeatability of the high-pressure gas flow measuring device 4 is 0.5 g / s.

[0057] More specifically: the multi-interface voltage regulator and rectifier 5 has an inner diameter of 100mm and a length of 500mm.

[0058] More specifically: the multi-interface voltage regulator and rectifier 5 is pressure-resistant to 4 MPa and has a quick-installation pipe connector at the outlet to improve installation efficiency.

[0059] More specifically: the gas supply interference elimination pipeline 8 has an inner diameter of 10mm, a pressure resistance of 1.5Mpa, and a bending radius of 5-10 times the inner diameter, which can eliminate the influence of high-pressure gas supply on the measurement accuracy of the force balance.

[0060] More specifically: the surface of the jet rectifier 12 adopts the Vickers formula contraction curve to make the gas flow in the device uniform.

[0061] More specifically: the maximum working pressure of the high-pressure air supply device for the jet control wind tunnel test is 1.5 MPa, the flow control range is 0-500 g / s, and the control accuracy is ±0.5 g / s.

[0062] More specifically: High-pressure air enters the high-pressure gas flow control device 2 from the gas source through the high-pressure gas supply pipeline 1 to control the required high-pressure air flow rate, and enters the high-pressure gas flow measurement device 4 through the connecting pipeline 3 to accurately measure the mass flow rate of the high-pressure gas.

[0063] Before the high-pressure air enters the jet rectification cavity and jet flow field simulation device 7, in order to achieve the uniformity of the simulated flow field and aerodynamic force measurement, the airflow first enters the multi-port voltage stabilizing and rectification device 5 for rectification, then enters the jet aerodynamic force measurement device 6 to measure the aerodynamic force generated by the jet, and finally flows out of the model surface through the jet rectification cavity and jet flow field simulation device 7 to form the target jet flow field.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; as long as there is no structural conflict, the various features in the specific embodiments disclosed in this application can be combined with each other in any way, and will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fluidic control wind tunnel test high pressure gas supply apparatus, characterized by, It comprises a high-pressure gas supply pipeline (1), a high-pressure gas flow control device (2), a connecting pipeline (3), a high-pressure gas flow measuring device (4), a multi-interface stable voltage rectifier device (5), a jet aerodynamic force measuring device (6), a jet rectification cavity and a jet flow field simulation device (7). The high-pressure gas supply pipeline (1) is connected with the high-pressure gas flow control device (2), the high-pressure gas flow control device (2), the high-pressure gas flow measuring device (4) and the multi-interface stable voltage rectifier device (5) are sequentially connected through the connecting pipeline (3). The jet aerodynamic force measuring device (6) comprises a gas supply disturbance elimination pipeline (8), a force balance (9) and a gas pipeline support frame (10). The force balance (9) is installed between the two gas pipeline support frames (10), the gas supply disturbance elimination pipeline (8) is arranged outside the force balance (9) in a curved shape through the gas pipeline support frame (10) and does not contact the force balance (9). One end of the gas supply disturbance elimination pipeline (8) is connected with the multi-interface stable voltage rectifier device (5) and the other end is connected with the jet rectification cavity and the jet flow field simulation device (7). The high-pressure gas flow control device (2) comprises a shell (21), a needle valve (14), a driving motor (15), a motor control module (16) and a needle valve position feedback module (17). The needle valve (14) is arranged in the shell (21), the shell (21) is sequentially connected from left to right with the needle valve position feedback module (17), the driving motor (15) and the motor control module (16) at the outer end. The needle valve position feedback module (17) transmits signals to the motor control module (16), the motor control module (16) remotely controls the driving motor (15), and the driving motor (15) drives the needle valve (14). The high-pressure gas flow measuring device (4) is provided with a Laval nozzle (18) and temperature and pressure sensors at the throat. The multi-interface stable voltage rectifier device (5) is internally provided with a damping net (19) and a perforated plate (20). The jet rectification cavity and the jet flow field simulation device (7) comprise a branch gas supply pipeline (11), a jet rectification device (12) and a jet flow field simulation cavity (13). Gas is converged from the gas supply disturbance elimination pipeline (8) to the branch gas supply pipeline (11), flows into the jet flow field simulation cavity (13) through the jet rectification device (12) and flows out from the surface of the jet flow field simulation cavity (13).

2. The fluidic control wind tunnel test high pressure gas supply apparatus of claim 1, wherein, The high-pressure gas supply pipeline (1) is connected with the high-pressure gas flow control device (2) through flanges, the connecting pipeline (3) is connected with the high-pressure gas flow control device (2), the high-pressure gas flow measuring device (4) and the multi-interface stable voltage rectifier device (5) through flanges, and O-rings are arranged at the connecting positions.

3. The fluidic control wind tunnel test high pressure gas supply apparatus of claim 1, wherein, The high-pressure gas supply pipeline (1) is a hose with an inner diameter of 50 mm and a pressure resistance of 6 MPa.

4. The fluidic control wind tunnel test high pressure gas supply of claim 1, wherein, The high-pressure gas flow control device (2) has a pressure resistance of 4 MPa.

5. The fluidic control of wind tunnel test high pressure gas supply device according to claim 1, characterized in that, The high-pressure gas flow measuring device (4) has a measurement repeatability of 0.5 g / s.

6. The fluidic control of wind tunnel test high pressure gas supply device according to claim 1, characterized in that, The multi-interface stable voltage rectifier device (5) has an inner diameter of 100 mm and a length of 500 mm. The multi-interface stable voltage rectifier device (5) has a pressure resistance of 4 MPa.

7. The fluidic control of wind tunnel test high pressure gas supply apparatus according to claim 1, wherein The air supply de-noise pipeline (8) has an inner diameter of 10 mm, a pressure resistance of 1.5 Mpa, and a bending radius of 5-10 times of the inner diameter.

8. The fluidic control wind tunnel test high pressure gas supply apparatus of claim 1 wherein, The profile in the jet flow rectifying device (12) adopts a Vickers formula contraction curve.

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