Active jet flow interference suppression device

Abstract

The invention provides an active jet interference suppression device. The active jet interference suppression device comprises a first flow guide channel, a second flow guide channel, a first cover plate, a second cover plate, flow deflectors, a blowing and sucking air source, a pressure sensor and a controller, wherein the first cover plate and the second cover plate are arranged in an upstream high-pressure interference area and a downstream low-pressure interference area of a nozzle respectively. The first diversion channel is connected with the suction end of the blowing-suction air source and the first cover plate, and the second diversion channel is connected with the blowing end and the second cover plate; a ventilation opening is formed in the cover plate; the pressure sensor monitors the pressure of the two interference areas in real time; and the controller adaptively adjusts the suction and blowing force of the blowing air source according to the analysis result of the pressure signal. Pressure distribution in front of and behind the nozzle can be actively regulated and controlled in real time, high pressure is effectively reduced, low pressure is effectively increased, accordingly, unfavorable aerodynamic force and torque generated by jet flow interference are remarkably restrained, and the control stability of an aircraft is improved.

Description

Technical Field

[0001] This invention relates to the field of aircraft flow control technology, and more specifically to an active jet interference suppression device. Background Technology

[0002] The jet reaction control system (RCS) is one of the essential means for aircraft to achieve cross-speed range flight and high-maneuverability control. Under jet activation conditions, the interference process between the jet and the incoming flow is complex: upstream of the nozzle, the jet strongly impedes the incoming flow, forming a bow-shaped shock wave. After passing through this shock wave, the supersonic incoming flow experiences a sudden drop in velocity and a sudden increase in pressure, creating a high-pressure interference zone upstream of the nozzle on the aircraft surface. External supersonic incoming flow, after bypassing the jet, expands rapidly, generating a series of expansion waves. After passing through these expansion waves, the airflow experiences a sudden increase in velocity and a sudden drop in pressure, creating a low-pressure interference zone downstream of the nozzle on the aircraft surface. The force generated by the high-pressure interference zone on the aircraft is in the same direction as the jet control, while the low-pressure interference zone generates a force opposite to the jet thrust. The combined effect of the high / low-pressure interference zones produces additional interference torque, affecting aircraft control.

[0003] In summary, the high / low pressure interference zones before and after the nozzle are the root cause of adverse interference forces / torques. Therefore, for aircraft with RCS (Radar Cross Section), a device needs to be designed to regulate the high / low pressure interference zones to suppress adverse jet interference. Summary of the Invention

[0004] The purpose of this invention is to provide an active jet interference suppression device that effectively suppresses jet interference by adaptively controlling the high and low pressure interference zones before and after the nozzle.

[0005] According to one objective of the present invention, an active jet interference suppression device is provided, comprising: Air source for blowing and suction; The first flow channel has one end connected to the suction end of the blowing and sucking air source; The second flow channel has one end connected to the blowing end of the air source; A first cover plate is connected to the other end of the first guide channel and is adapted to be arranged in the high-pressure interference area upstream of the jet nozzle. The first cover plate is provided with a ventilation opening. The second cover plate is connected to the other end of the second guide channel and is adapted to be arranged in the low-pressure interference area downstream of the jet nozzle. The second cover plate is provided with a ventilation opening. A first pressure sensor is used to detect the pressure in the high-pressure interference zone; The second pressure sensor is used to detect the pressure in the low-pressure interference zone; The controller is connected to the first pressure sensor, the second pressure sensor, and the blowing / suction air source signal, respectively, and is used to control the operation of the blowing / suction air source to synchronously adjust the suction flow rate and / or the blowing / jetting flow rate according to the detection signals of the first pressure sensor and / or the second pressure sensor.

[0006] Furthermore, a guide plate is provided at the corner of the first guide channel and / or the second guide channel, and the surface contour of the guide plate is set in accordance with the flow direction at the corner.

[0007] Furthermore, the surface profile of the first cover plate is adapted to the surface profile of the aircraft, and the ventilation opening direction on the first cover plate is set to face the incoming flow direction; and / or, the surface profile of the second cover plate is adapted to the surface profile of the aircraft, and the ventilation opening direction on the second cover plate is set to follow the incoming flow direction.

[0008] Furthermore, the ventilation openings on the first cover plate are multiple spaced-apart circular holes; and / or, the ventilation openings on the second cover plate are louvered structures.

[0009] Furthermore, both the first and second flow channels are pipe structures that are open at both ends and circumferentially closed.

[0010] Furthermore, the first pressure sensor and / or the second pressure sensor are in fluid communication with the surface of the aircraft via pressure transmission pipes.

[0011] Furthermore, the blowing and suction air source is a pressure generating device capable of simultaneously outputting positive and negative pressure airflow in both directions.

[0012] Furthermore, the blowing and suction air source includes a piston-type cylinder, and the blowing pressure and suction pressure are adjusted by adjusting the piston's motion parameters.

[0013] Furthermore, the controller is configured to: compare the detection values ​​of the first pressure sensor and the second pressure sensor, or compare their detection values ​​with a preset threshold, and generate a control command for adjusting the output pressure of the blowing and sucking air source based on the comparison result.

[0014] Furthermore, the device is configured to reduce the pressure difference caused by jet interference by actively drawing gas from the high-pressure interference zone and actively blowing gas into the low-pressure interference zone.

[0015] This invention's technical solution senses pressure changes in the high-pressure and low-pressure interference zones before and after the nozzle in real time, and uses a blow-suction air source to synchronously and adaptively regulate the suction and blowing in both zones: actively extracting overpressured gas from the high-pressure zone to reduce pressure, while simultaneously injecting gas into the low-pressure zone to increase pressure. This dynamic closed-loop control mechanism can significantly weaken the pressure difference between the high and low-pressure interference zones, thereby effectively suppressing the adverse aerodynamic forces and torques caused by jet interference, improving the aircraft's handling stability and safety during jet control, and the system has a fast response and strong adaptability, making it suitable for the flow control requirements of high-maneuverability flight across speed ranges. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the device structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the cover plate in an embodiment of the present invention; In the diagram: 1. First flow channel; 2. Second flow channel; 3. First cover plate; 4. Second cover plate; 5. Flow guide plate; 6. First pressure sensor; 7. Second pressure sensor; 8. Air source for blowing and suction; 9. Controller. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1 like Figure 1 and Figure 2 As shown, an active jet interference suppression device includes a first flow guide channel 1, a second flow guide channel 2, a first cover plate 3, a second cover plate 4, a flow guide plate 5, a first pressure sensor 6, a second pressure sensor 7, a blowing / suction air source 8, and a controller 9, wherein: The first guide channel 1 connects the intake end of the air-blowing source 8 to the first cover plate 3, and the second guide channel 2 connects the exhaust end of the air-blowing source 8 to the second cover plate 4. The two cover plates are located in the high-pressure interference zone upstream of the nozzle and the low-pressure interference zone downstream of the nozzle, respectively, with surface contours consistent with the local surface of the aircraft to reduce aerodynamic impact. The vent opening of the first cover plate 3 faces the incoming flow direction to facilitate gas intake; the vent opening of the second cover plate 4 faces the incoming flow direction to facilitate gas exhaust. The guide vane 5 is located at the corner of the guide channel and is arc-shaped, which helps the airflow to smoothly change direction.

[0022] The first pressure sensor 6 and the second pressure sensor 7 are connected to the surface of the aircraft via pressure transmission pipes to collect pressure signals from high and low pressure interference zones in real time and transmit them to the controller 9. Based on the pressure signal analysis results, the controller 9 sends adjustment commands to the air supply 8 to control its air pressure, thereby achieving dynamic regulation.

[0023] In this embodiment, the air source 8 can be a piston cylinder, and the pressure can be adjusted by regulating the piston speed. The vent opening on the first cover plate 3 can be a round hole, and the vent opening on the second cover plate 4 can be a louvered structure.

[0024] In summary, this device achieves adaptive suppression of jet interference through closed-loop control, making it suitable for the flow control requirements of various high-speed aircraft. This invention effectively reduces pressure in the high-pressure zone and increases pressure in the low-pressure zone by adaptively adjusting the suction in the high-pressure zone and the blowing in the low-pressure zone, thereby significantly suppressing jet interference.

[0025] Example 2 like Figure 1 As shown, this embodiment of an active jet interference suppression device includes a first flow guide channel 1, a second flow guide channel 2, a first cover plate 3, a second cover plate 4, a flow guide plate 5, a blowing / suction air source 8, a first pressure sensor 6, a second pressure sensor 7, and a controller 9; wherein: The first guide channel 1 and the second guide channel 2 are both ventilated and sealed around the perimeter. One end of the first guide channel 1 is connected to the suction end of the blowing and suction air source 8, and the other end is connected to the first cover plate 3. One end of the second guide channel 2 is connected to the blowing end of the blowing and suction air source 8, and the other end is connected to the second cover plate 4. The first cover plate 3 is located in the high-pressure interference zone upstream of the nozzle, and the second cover plate 2 is located in the low-pressure interference zone downstream of the nozzle. Ventilation openings are arranged on the first cover plate 3 and the second cover plate 4. The guide vane 5 is located at the corner of the guide channel. The blowing and suction air source 8 can achieve synchronous blowing and suction, and the blowing and suction pressure can be adjusted. The first pressure sensor 6 and the second pressure sensor 7 are located at both ends of the device. The controller 9 receives the pressure sensor signals and controls the operation of the blowing and suction air source 8.

[0026] The first guide channel 1 is ventilated at both ends and sealed around the perimeter. One end is connected to the suction end of the blowing and suction source 8, and the other end is connected to the first cover plate 3.

[0027] The second guide channel 2 is ventilated at both ends and sealed around the perimeter. One end is connected to the blowing end of the blowing and suction air source 8, and the other end is connected to the second cover plate 4.

[0028] The first cover plate 3 is located in the high-pressure interference zone upstream of the nozzle. Its surface profile is consistent with the surface profile of the local position of the aircraft. Several ventilation openings are arranged on the first cover plate 3. The ventilation openings face the incoming flow. The openings facing the incoming flow can allow the gas to be drawn in more smoothly.

[0029] The second cover plate 4 is located in the low-pressure interference zone downstream of the nozzle. Its surface profile is consistent with the surface profile of the local location of the aircraft. Several ventilation openings are arranged on the second cover plate 4. The ventilation openings are oriented in the direction of the incoming flow, which allows the gas to be discharged more smoothly.

[0030] The guide vane 5 is located at the two corners of the flow channel. The arc direction of the guide vane 5 follows the direction of the corner. The guide vane 5 can sort out the gas flow in the channel and reduce flow loss.

[0031] In this embodiment, the corners of the flow guiding channel need to be smoothly transitioned to reduce flow loss.

[0032] like Figure 2 As shown, in this embodiment, the ventilation opening on the first cover plate 3 is a round hole, and the ventilation opening on the second cover plate 4 is a louvered opening.

[0033] The blowing and suction air source 8 can achieve synchronous blowing and suction, and the blowing and suction pressure can be adjusted. In this embodiment, the blowing and suction air source 8 adopts a piston-type cylinder. By controlling the moving speed of the cylinder piston, the blowing and suction pressure can be adjusted.

[0034] The first pressure sensor 6 and the second pressure sensor 7 are located at both ends of the device. Two pressure-transmitting pipes extend downward from the surface of the aircraft and are connected to the pressure sensors. The first pressure sensor 6 is used to monitor the pressure in the high-pressure interference area, and the second pressure sensor 7 is used to monitor the pressure in the low-pressure interference area. The pressure signals measured by the pressure sensors are fed back to the controller 9.

[0035] The controller 9 receives pressure signals from the first pressure sensor 6 and the second pressure sensor 7. After analyzing the pressure signals, it sends an adjustment command to the air source 8.

[0036] This invention discloses an active jet interference suppression device. By arranging pressure sensors in the high / low pressure interference zones on the surface of an aircraft to monitor the pressure in real time, the device can adaptively adjust the suction force in the high-pressure zone and the blowing force in the low-pressure zone based on the pressure data transmitted by the pressure sensors. This effectively reduces the pressure in the high-pressure interference zone and increases the pressure in the low-pressure interference zone, thereby effectively suppressing jet interference.

[0037] This invention involves arranging pressure sensors in high / low pressure interference zones on the surface of an aircraft to monitor pressure conditions in real time. Based on the pressure data transmitted by the pressure sensors, the device can adaptively adjust the suction force in the high-pressure zone and the blowing force in the low-pressure zone, thereby effectively reducing the pressure in the high-pressure interference zone, increasing the pressure in the low-pressure interference zone, and effectively suppressing unfavorable jet interference.

[0038] 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, those skilled in the art should understand that 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; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An active jet interference suppression device, characterized in that, include: Air source for blowing and suction; The first flow channel has one end connected to the suction end of the blowing and sucking air source; The second flow channel has one end connected to the blowing end of the air source; A first cover plate is connected to the other end of the first guide channel and is adapted to be arranged in the high-pressure interference area upstream of the jet nozzle. The first cover plate is provided with a ventilation opening. The second cover plate is connected to the other end of the second guide channel and is adapted to be arranged in the low-pressure interference area downstream of the jet nozzle. The second cover plate is provided with a ventilation opening. A first pressure sensor is used to detect the pressure in the high-pressure interference zone; The second pressure sensor is used to detect the pressure in the low-pressure interference zone; The controller is connected to the first pressure sensor, the second pressure sensor, and the blowing / suction air source signal, respectively, and is used to control the operation of the blowing / suction air source to synchronously adjust the suction flow rate and / or the blowing / jetting flow rate according to the detection signals of the first pressure sensor and / or the second pressure sensor.

2. The active jet interference suppression device according to claim 1, characterized in that, A guide vane is provided at the corner of the first flow channel and / or the second flow channel, and the surface contour of the guide vane is set in accordance with the flow direction at the corner.

3. The active jet interference suppression device according to claim 1, characterized in that, The surface profile of the first cover plate is adapted to the surface profile of the aircraft, and the ventilation opening direction on the first cover plate is set to face the incoming flow direction; and / or, the surface profile of the second cover plate is adapted to the surface profile of the aircraft, and the ventilation opening direction on the second cover plate is set to follow the incoming flow direction.

4. The active jet interference suppression device according to claim 3, characterized in that, The ventilation openings on the first cover plate are multiple spaced-apart circular holes; and / or, the ventilation openings on the second cover plate are louvered structures.

5. The active jet interference suppression device according to claim 1, characterized in that, Both the first and second flow channels are pipe structures that are open at both ends and circumferentially closed.

6. The active jet interference suppression device according to claim 1, characterized in that, The first pressure sensor and / or the second pressure sensor are in fluid communication with the surface of the aircraft via pressure transmission pipes.

7. The active jet interference suppression device according to claim 1, characterized in that, The blowing and suction air source is a pressure generating device capable of simultaneously outputting positive and negative pressure airflow in both directions.

8. The active jet interference suppression device according to claim 7, characterized in that, The blowing and suction air source includes a piston-type cylinder, and the blowing pressure and suction pressure are adjusted by adjusting the piston's motion parameters.

9. The active jet interference suppression device according to claim 1, characterized in that, The controller is configured to: compare the detection values ​​of the first pressure sensor and the second pressure sensor, or compare their detection values ​​with a preset threshold, and generate a control command for adjusting the output pressure of the blowing and sucking air source based on the comparison result.

10. The active jet interference suppression device according to any one of claims 1-9, characterized in that, The device is configured to reduce the pressure difference caused by jet interference by actively drawing gas from the high-pressure interference zone and actively blowing gas into the low-pressure interference zone.

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