A self-bleeding yawing aerodynamic vectoring nozzle with symmetric outlets

Abstract

The application provides a self-bleed yawing aerodynamic vector nozzle with symmetrical outlets, and belongs to the technical field of air intake and exhaust of an aero-engine. Specifically, convergent special-shaped first and second gas outlets on a nozzle cylinder realize positive backward shielding, and are self-bleed through the pressure gradient formed by the in-line expansion of the airflow in the nozzle cylinder. By introducing the airflow with high pressure at the front end of the nozzle cylinder near the two symmetrical outlets of the nozzle cylinder, the mass flow of the two outlets is made to be different, and the disturbance of the bleed airflow to the main airflow is utilized to change the thrust direction, so as to form a yawing moment to realize yawing vector, the application can provide two use modes of no vector or yawing vector moment for the engine, provide additional control moment for the attitude deflection of the aircraft, and reduce the dependence of the aircraft on the yawing rudder surface.

Description

Technical Field

[0001] This application relates to the field of intake and exhaust of aero engines, and in particular to a self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets. Background Technology

[0002] The nozzle is the exhaust device of an aircraft engine. High-temperature gas expands and does work inside the nozzle, generating thrust. Nozzles are classified according to their exhaust performance as subsonic nozzles and supersonic nozzles; according to their structural form as convergent nozzles and divergent nozzles; according to their mechanism as fixed nozzles and adjustable nozzles; and can also be equipped with profile shielding and vectoring functions according to usage requirements.

[0003] As some engines increasingly demand low observability and maneuverability, nozzles often need to possess both low observability and thrust vectoring capabilities. Low observability can be achieved by using nozzle-shaped flow channels to shield rearward-viewable components and increase the number of radar wave reflections. Currently, some engine models use this type of nozzle structure, but it is a fixed nozzle, and aircraft attitude control relies on control surfaces. The thrust vectoring function of such low-observable nozzles can be achieved by adding mechanically controlled adjustment vanes, but this is structurally complex and not conducive to integrated design with the rear fuselage. To solve this problem, aerodynamic adjustment can be used to achieve thrust vectoring. Patent application CN103993982A discloses a double S-curve infrared stealth structure capable of multi-directional thrust vectoring control. This nozzle configuration is an active thrust vectoring low-observable nozzle, generally drawing air from the high-pressure compressor and redistributing it to change the main thrust direction. However, introducing high-pressure secondary flow will have a certain impact on engine fuel consumption and thrust. Summary of the Invention

[0004] In view of this, this application provides a self-bleed air yaw aerodynamic vector nozzle with symmetrical outlets, which solves the problem of needing additional bleed air in the prior art. Without the need for a secondary flow air source, it changes the direction of the outlet airflow and provides yaw torque, so that the self-bleed air yaw aerodynamic vector nozzle has both low detectability and yaw vector functions, providing additional control torque for aircraft attitude deflection.

[0005] The self-bleed air yaw aerodynamic vector nozzle with symmetrical outlets provided in this application adopts the following technical solution:

[0006] A self-bleed air yaw aerodynamic vector nozzle with symmetrical outlets includes a nozzle body, a bleed air assembly, and a switching assembly; The nozzle body includes an air inlet pipe, a first air outlet pipe, and a second air outlet pipe. Both the first and second air outlet pipes are connected to the air inlet pipe, and the first and second air outlet pipes are symmetrically arranged about the axis of the air inlet pipe. The first air outlet pipe has a first air intake inlet on the side facing the second air outlet pipe at the end near the air inlet pipe and a first air outlet on the side facing the second air outlet pipe at the end away from the air inlet pipe. The second air outlet pipe has a second air intake inlet on the side facing the first air outlet pipe at the end near the air inlet pipe and a second air outlet on the side facing the first air outlet pipe at the end away from the air inlet pipe. The air intake assembly includes a first air intake pipe, a second air intake pipe, a first air intake valve, a second air intake valve, a first control structure, and a second control structure. The first air intake pipe connects the first air intake and the second air intake outlet, and the second air intake pipe connects the second air intake and the first air intake outlet. The first air intake valve is rotatably mounted on the side of the first air intake, and the second air intake valve is rotatably mounted on the side of the second air intake. The first control structure is used to drive the first air intake valve to rotate to close or open the first air intake, and the second control structure is used to drive the second air intake valve to rotate to close or open the second air intake. The first air intake pipe and the second air intake pipe are arranged to cross each other. The intersection of the first air intake pipe and the second air intake pipe has four openings, namely a first opening, a second opening, a third opening, and a fourth opening. The first opening and the second opening are located on the side wall of the first air intake pipe, and the third opening and the fourth opening are located on the side wall of the second air intake pipe. The adjoining side of the first opening and the third opening faces the air intake pipe, and the adjoining side of the second opening and the fourth opening faces the outlet side of the nozzle cylinder. The switching component is installed at the intersection of the first air intake pipe and the second air intake pipe. The switching component is configured to: control the first opening and the second opening to open or close synchronously, control the third opening and the fourth opening to open or close synchronously, and control the fully open or closed states of the first opening and the third opening to be opposite.

[0007] Optionally, the air intake assembly further includes an air intake control bracket fixedly disposed relative to the nozzle cylinder and located outside the nozzle cylinder. The first control structure and the second control structure are both motors fixedly mounted on the air intake control bracket. The output shaft of the first control structure is fixedly connected to the first air intake valve through a first connecting rod, and the output shaft of the second control structure is fixedly connected to the second air intake valve through a second connecting rod. Both the first connecting rod and the second connecting rod are partially located inside the nozzle cylinder and are rotatably connected to the nozzle cylinder.

[0008] Optionally, the first connecting rod and the first intake valve are connected on the side near the junction of the first exhaust pipe and the second exhaust pipe, and the second connecting rod and the second intake valve are connected on the side near the junction of the first exhaust pipe and the second exhaust pipe. When the first bleed air inlet is open, the first intake valve is located inside the first bleed air pipe, and when the second bleed air inlet is open, the second intake valve is located inside the second bleed air pipe.

[0009] Optionally, the switching component includes a first adjusting plate, a second adjusting plate, and a driving structure. The first adjusting plate is rotatably mounted at the junction of the first opening and the third opening, and the second adjusting plate is rotatably mounted at the junction of the second opening and the fourth opening. The driving structure is used to drive the first adjusting plate to close the first opening or the third opening, and the driving structure is also used to drive the second adjusting plate to close the second opening or the fourth opening. The drive structure is configured to: control the first adjustment plate to close the first opening or the third opening, control the second adjustment plate to close the second opening or the fourth opening, and control the first opening and the second opening to be in the same fully open or closed state.

[0010] Optionally, the drive structure includes a switching control bracket, a rotary drive component, a drive gear, a first driven sector gear, and a second driven sector gear, wherein the switching control bracket is fixedly disposed relative to the nozzle cylinder. The axial position of the first driven sector gear is fixedly connected to the first drive rod and the first adjusting plate near the junction of the first opening and the third opening. The first drive rod is rotatably connected to the side wall of the first air intake pipe and / or the second air intake pipe. The axial position of the second driven sector gear is fixedly connected to the second drive rod and the second adjusting plate near the junction of the second opening and the fourth opening. The second drive rod is rotatably connected to the side wall of the first air intake pipe and / or the second air intake pipe. The driving gear is rotatably mounted on the switching control bracket. The driving gear meshes with the first driven sector gear and the second driven sector gear simultaneously. The rotary drive is fixedly mounted on the switching control bracket, and the rotary output shaft of the rotary drive is coaxially and fixedly connected to the driving gear.

[0011] Optionally, the toothed side of the first driven sector gear is located on the side of the first adjusting plate away from the first drive rod, and the toothed side of the second driven sector gear is located on the side of the second adjusting plate away from the second drive rod. The toothed arc-shaped sides of the first driven sector gear and the second driven sector gear are arranged opposite to each other, and the driving gear is located between the first driven sector gear and the second driven sector gear.

[0012] Optionally, the intersection of the first air intake pipe and the second air intake pipe is a straight section, and the first driven sector gear and the second driven sector gear have the same radius.

[0013] Optionally, the first and second air intake pipes are arc-shaped as a whole, the first adjusting plate rotates at an angle of a degrees from closing the first opening to closing the third opening, the second adjusting plate rotates at an angle of b degrees from closing the second opening to closing the fourth opening, and the radius ratio of the first driven sector gear and the second driven sector gear is b:a.

[0014] In summary, this application includes the following beneficial technical effects: This application utilizes the convergent, irregularly shaped first and second exhaust pipes with two symmetrical outlets to achieve rearward shielding of the engine, and performs self-bleeding air through the pressure gradient formed by the expansion of the flow along the nozzle body; by introducing high-pressure airflow at the front end of the nozzle body near the two symmetrical outlets, a difference in mass flow rate is created between the two outlets, and the bleed airflow is used to disturb the mainstream, changing the thrust direction, thereby forming a yaw moment to achieve yaw vectoring. This application can provide the engine with two usage modes: no vectoring or yaw vectoring moment, providing additional control torque for aircraft attitude deflection and reducing the aircraft's dependence on yaw control surfaces. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the nozzle cylinder of this application; Figure 2 This is a schematic diagram of the overall structure of the self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets in this application. Figure 3 This is a schematic diagram of the structure of the first and second air intake pipes of this application; Figure 4 A schematic diagram of the bleed air assembly under the first yaw moment state generated by the nozzle cylinder of this application; Figure 5 A schematic diagram of the bleed air assembly under the second yaw moment state of the nozzle cylinder of this application; Figure 6 This is a schematic diagram of the control structure of the first and second intake valves in this application; Figure 7 This is a schematic diagram of the switching component in this application.

[0017] Explanation of reference numerals in the attached drawings: 1. Nozzle body; 11. Inlet pipe; 12. First outlet pipe; 13. Second outlet pipe; 14. First bleed air inlet; 15. First bleed air outlet; 16. Second bleed air inlet; 17. Second bleed air outlet; 2. Bleed air assembly; 21. First bleed air pipe; 22. Second bleed air pipe; 23. First inlet valve; 24. Second inlet valve; 25. First control structure; 26. Second control structure; 27. First opening; 28. 29. Second opening; 210. Third opening; 211. Fourth opening; 212. Intake control bracket; 213. First connecting rod; 214. Second connecting rod; 35. Switching assembly; 36. First adjusting plate; 37. Second adjusting plate; 38. Drive structure; 39. Switching control bracket; 30. Rotary drive component; 310. Drive gear; 32. First driven sector gear; 32. Second driven sector gear; 33. First drive rod; 34. Second drive rod. Detailed Implementation

[0018] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0021] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0023] This application provides a self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets.

[0024] like Figures 1 to 7 As shown, a self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets includes a nozzle body 1, a bleeding air assembly 2, and a switching assembly 3.

[0025] like Figure 1 As shown, the nozzle body 1 includes an inlet pipe 11, a first outlet pipe 12, and a second outlet pipe 13. Both the first outlet pipe 12 and the second outlet pipe 13 are connected to the inlet pipe 11, and the first outlet pipe 12 and the second outlet pipe 13 are symmetrically arranged about the axis of the inlet pipe 11. The first outlet pipe 12 and the second outlet pipe 13 gradually move away from each other from the inlet side to the outlet side, and the outlets of the first outlet pipe 12 and the second outlet pipe 13 are rectangular. The design of the first outlet pipe 12 and the second outlet pipe 13 completely blocks the visible high-temperature components at the inlet of the nozzle body 1 from the rear of the outlet, giving the nozzle body 1 strong low detectability.

[0026] like Figure 2 and Figure 3 As shown in this application, the first exhaust pipe 12 has a first air inlet 14 on the side near the end of the intake pipe 11 and facing the second exhaust pipe 13, the first exhaust pipe 12 has a first air outlet 15 on the side away from the intake pipe 11 and facing the second exhaust pipe 13, the second exhaust pipe 13 has a second air inlet 16 on the side near the end of the intake pipe 11 and facing the first exhaust pipe 12, and the second exhaust pipe 13 has a second air outlet 17 on the side away from the intake pipe 11 and facing the first exhaust pipe 12.

[0027] The bleed air assembly 2 includes a first bleed air pipe 21, a second bleed air pipe 22, a first air inlet valve 23, a second air inlet valve 24, a first control structure 25, and a second control structure 26. The first bleed air pipe 21 connects to the first bleed air inlet 14 and the second bleed air outlet 17. The second bleed air pipe 22 connects to the second bleed air inlet 16 and the first bleed air outlet 15. The first air inlet valve 23 is rotatably mounted on the side of the first bleed air inlet 14, and the second air inlet valve 24 is rotatably mounted on the side of the second bleed air inlet 16. The first control structure 25 is used to drive the first air inlet valve 23 to rotate to close or open the first bleed air inlet 14. The second control structure 26 is used to drive the first air inlet valve 23 to rotate to close or open the first bleed air inlet 14. The second intake valve 24 rotates to close or open the second bleed air inlet 16; the first bleed air pipe 21 and the second bleed air pipe 22 are arranged to cross each other, and the intersection of the first bleed air pipe 21 and the second bleed air pipe 22 has four openings, namely the first opening 27, the second opening 28, the third opening 29 and the fourth opening 210. The first opening 27 and the second opening 28 are located on the side wall of the first bleed air pipe 21, and the third opening 29 and the fourth opening 210 are located on the side wall of the second bleed air pipe 22. The confluence of the first opening 27 and the third opening 29 faces the intake pipe 11, and the confluence of the second opening 28 and the fourth opening 210 faces the outlet side of the nozzle body 1.

[0028] The switching component 3 is installed at the intersection of the first air intake pipe 21 and the second air intake pipe 22. The switching component 3 is configured to: control the first opening 27 and the second opening 28 to open or close synchronously, control the third opening 29 and the fourth opening 210 to open or close synchronously, and control the fully open or closed states of the first opening 27 and the third opening 29 to be opposite.

[0029] The self-bleed air yaw aerodynamic vector nozzle of this application can selectively open the first bleed air pipe 21 or the second bleed air pipe 22 by controlling the opening or closing states of the first bleed air inlet 14, the second bleed air inlet 16, the first opening 27, the second opening 28, the third opening 29 and the fourth opening 210.

[0030] When the first intake valve 23 and the second intake valve 24 are closed to the first bleed air inlet 14 and the second bleed air inlet 16, the airflow entering the intake pipe 11 is divided into two streams through the first exhaust pipe 12 and the second exhaust pipe 13, and discharged from the outlets of the first exhaust pipe 12 and the second exhaust pipe 13 respectively. The outlet thrust of the first exhaust pipe 12 and the second exhaust pipe 13 is the same, and no yaw moment is generated relative to the center position of the inlet section of the intake pipe 11.

[0031] like Figure 4As shown, when the first intake valve 23 is fully open, the first bleed air inlet 14 is opened, and the second intake valve 24 is closed, the second bleed air inlet 16 is closed. The switching component 3 controls the position of the first adjusting plate 31 and the second adjusting plate 32, so that the first opening 27 and the second opening 28 are simultaneously fully open, and the third opening 29 and the fourth opening 210 are completely closed. At this time, the first bleed air pipe 21 is open, and part of the airflow at the inlet of the first exhaust pipe 12 is directed to the outlet of the second exhaust pipe 13, so that the thrust at the outlet of the second exhaust pipe 13 is greater than the thrust at the outlet of the first exhaust pipe 12, thereby generating the first type of yaw moment.

[0032] like Figure 5 As shown, when the second intake valve 24 is fully open, the second bleed air inlet 16 is opened, and the first intake valve 23 is closed, the first bleed air inlet 14 is closed. The switching component 3 controls the position of the first adjusting plate 31 and the second adjusting plate 32, so that the third opening 29 and the fourth opening 210 are simultaneously fully open, and the first opening 27 and the second opening 28 are completely closed. At this time, the second bleed air pipe 22 is open, and part of the airflow at the inlet of the second exhaust pipe 13 is directed to the outlet of the first exhaust pipe 12, so that the thrust at the outlet of the first exhaust pipe 12 is greater than the thrust at the outlet of the second exhaust pipe 13, thereby generating a second type of yaw torque.

[0033] This application utilizes the convergent, irregularly shaped first exhaust pipe 12 and second exhaust pipe 13 with two symmetrical outlets to achieve rearward shielding of the engine, and performs self-bleeding air through the pressure gradient formed by the expansion of the flow along the nozzle cylinder 1; by introducing high-pressure airflow at the front end of the nozzle cylinder 1 near the two symmetrical outlets of the nozzle cylinder 1, a difference in mass flow rate is created between the two outlets, and the bleed airflow is used to disturb the mainstream, changing the thrust direction, thereby forming a yaw moment to achieve yaw vectoring. This application can provide the engine with two usage modes: no vectoring or yaw vectoring moment, providing additional control torque for aircraft attitude deflection and reducing the aircraft's dependence on yaw control surfaces.

[0034] like Figure 2 and Figure 6As shown, the control of the first intake valve 23 and the second intake valve 24 is specifically as follows: The air intake assembly 2 further includes an intake control bracket 211 fixedly disposed relative to the nozzle cylinder 1 and located outside the nozzle cylinder 1. The first control structure 25 and the second control structure 26 are both motors fixedly mounted on the intake control bracket 211. The output shaft of the first control structure 25 is fixedly connected to the first intake valve 23 via a first connecting rod 212, and the output shaft of the second control structure 26 is fixedly connected to the second intake valve 24 via a second connecting rod 213. Both the first connecting rod 212 and the second connecting rod 213 are partially located inside the nozzle cylinder 1 and rotatably connected to the nozzle cylinder 1. By independently controlling the first control structure 25 and the second control structure 26, independent control of the first intake valve 23 and the second intake valve 24 is achieved.

[0035] The first connecting rod 212 and the first intake valve 23 are connected on the side near the junction of the first exhaust pipe 12 and the second exhaust pipe 13. The second connecting rod 213 and the second intake valve 24 are connected on the side near the junction of the first exhaust pipe 12 and the second exhaust pipe 13. When the first bleed inlet 14 is open, the first intake valve 23 is located inside the first bleed pipe 21. When the second bleed inlet 16 is open, the second intake valve 24 is located inside the second bleed pipe 22. The first intake valve 23 and the second intake valve 24 rotate in the direction of airflow during the opening process. Moreover, when the first intake valve 23 and the second intake valve 24 are fully open, the hinge end to the free end is in the direction of airflow, reducing the obstruction of the airflow by the first intake valve 23 and the second intake valve 24, and also reducing the force of the airflow on the first intake valve 23 and the second intake valve 24, ensuring the stability of the position of the first intake valve 23 and the second intake valve 24. In one embodiment, the shape of the first intake valve 23 matches the inner wall surface of the inlet section of the first air duct 21 facing the second air duct 22, and the shape of the second intake valve 24 matches the inner wall surface of the inlet section of the second air duct 22 facing the first air duct 21, so that the first intake valve 23 and the second intake valve 24 can fit against the inner walls of the first air duct 21 and the second air duct 22 when they are open.

[0036] like Figure 2 and Figure 7As shown, the switching component 3 specifically comprises: a first adjusting plate 31, a second adjusting plate 32, and a driving structure 33. The first adjusting plate 31 is rotatably mounted at the junction of the first opening 27 and the third opening 29, and the second adjusting plate 32 is rotatably mounted at the junction of the second opening 28 and the fourth opening 210. The driving structure 33 is used to drive the first adjusting plate 31 to close the first opening 27 or the third opening 29, and the driving structure 33 is also used to drive the second adjusting plate 32 to close the second opening 28 or the fourth opening 210. The driving structure 33 is configured to: control the first adjusting plate 31 to close the first opening 27 or the third opening 29, control the second adjusting plate 32 to close the second opening 28 or the fourth opening 210, and control the fully open or closed states of the first opening 27 and the second opening 28 to be the same.

[0037] The hinge end of the first adjusting plate 31 is located at the junction of the first opening 27 and the third opening 29. By controlling the angle of the first adjusting plate 31, the third opening 29 is fully open when the first adjusting plate 31 closes the first opening 27, and the first opening 27 is fully open when the first adjusting plate 31 closes the third opening 29. The hinge end of the second adjusting plate 32 is located at the junction of the second opening 28 and the fourth opening 210. By controlling the angle of the second adjusting plate 32, the fourth opening 210 is fully open when the second adjusting plate 32 closes the second opening 28, and the second opening 28 is fully open when the second adjusting plate 32 closes the fourth opening 210.

[0038] For the drive structure 33, specifically: the drive structure 33 includes a switching control bracket 34, a rotary drive component 35, a drive gear 36, a first driven sector gear 37, and a second driven sector gear 38. The switching control bracket 34 is fixedly disposed relative to the nozzle cylinder 1. The axis of the first driven sector gear 37 is fixedly connected to the first drive rod 39 and the first adjusting plate 31 near the junction of the first opening 27 and the third opening 29. The first drive rod 39 is rotatably connected to the side wall of the first air intake pipe 21 and / or the second air intake pipe 22. The axis of the second driven sector gear 38 is... The line position is fixedly connected to the second drive rod 310 and the second adjusting plate 32 near the junction of the second opening 28 and the fourth opening 210. The second drive rod 310 is rotatably connected to the side wall of the first air intake pipe 21 and / or the second air intake pipe 22. The drive gear 36 is rotatably mounted on the switching control bracket 34. The drive gear 36 meshes with the first driven sector gear 37 and the second driven sector gear 38. The rotary drive 35 is fixedly mounted on the switching control bracket 34. The rotary output shaft of the rotary drive 35 is coaxially fixedly connected to the drive gear 36. In this embodiment, the first drive rod 39 is rotatably connected to the side wall of the first air intake pipe 21 and the second air intake pipe 22 near the side of the intake pipe 11. The second drive rod 310 is rotatably connected to the side wall of the second air intake pipe 22 opposite to the side of the intake pipe 11. The rotary drive component 35 is a motor. The rotary drive component 35 drives the drive gear 36 to rotate. The drive gear 36 simultaneously drives the first driven sector gear 37 and the second driven sector gear 38 to rotate, thereby achieving the technical objective of one drive source driving the first adjustment plate 31 and the second adjustment plate 32 to rotate simultaneously.

[0039] Regarding the specific design of the first driven sector gear 37 and the second driven sector gear 38, the toothed side of the first driven sector gear 37 is located on the side of the first adjusting plate 31 away from the first drive rod 39, and the toothed side of the second driven sector gear 38 is located on the side of the second adjusting plate 32 away from the second drive rod 310. The toothed arc-shaped sides of the first driven sector gear 37 and the second driven sector gear 38 are arranged opposite to each other, and the driving gear 36 is located between the first driven sector gear 37 and the second driven sector gear 38.

[0040] In one embodiment, the intersection of the first air intake pipe 21 and the second air intake pipe 22 is a straight section, the widths of the first opening 27, the second opening 28, the third opening 29 and the fourth opening 210 are the same, the first adjusting plate 31 moves from closing the first opening 27 to closing the third opening 29, and the second adjusting plate 32 moves from closing the second opening 28 to closing the fourth opening 210, the first adjusting plate 31 and the second adjusting plate 32 rotate at the same angle, and the radii of the first driven sector gear 37 and the second driven sector gear 38 are the same.

[0041] In one embodiment, the first air intake pipe 21 and the second air intake pipe 22 are generally arc-shaped, the first adjusting plate 31 rotates at an angle of a degree from closing the first opening 27 to closing the third opening 29, the second adjusting plate 32 rotates at an angle of b degrees from closing the second opening 28 to closing the fourth opening 210, and the radius ratio of the first driven sector gear 37 and the second driven sector gear 38 is b:a. Due to the overall arc design of the first air intake pipe 21 and the second air intake pipe 22, and the identical cross-sections of the first air intake pipe 21 and the second air intake pipe 22, the first width of the first opening 27 and the third opening 29 are identical, and the second width of the second opening 28 and the fourth opening 210 are identical, but the first width and the second width may not be identical. During the process of the first adjusting plate 31 closing the first opening 27 to closing the third opening 29, the rotation angle of the first adjusting plate 31 is 'a' degrees. During the process of the second adjusting plate 32 closing the second opening 28 to closing the fourth opening 210, the rotation angle of the second adjusting plate 32 is 'b' degrees. To ensure the synchronicity of the first adjusting plate 31 and the second adjusting plate 32 from fully closed to fully open, the radius ratio of the first driven sector gear 37 and the second driven sector gear 38 is adjusted to b:a, allowing the adjusting plate requiring a larger rotation angle to rotate at a faster speed. In one embodiment, a is 27 and b is 37.

[0042] When the pressure ratio of the nozzle body 1 is 3 and 4, the outlet mass flow rate of the nozzle body 1 in the state of no yaw moment and the state of generating the first yaw moment are shown in Table 1. Due to the joint adjustment of the bleed air assembly 2 and the switching assembly 3, the nozzle body 1 generates the first yaw moment state. When the pressure ratio of the nozzle body 1 is 3 and 4, the airflow of 0.345 kg / s and 0.435 kg / s passes through the first bleed air pipe 21 and finally flows to the outlet of the second exhaust pipe 13, forming a state in which the outlet of the first exhaust pipe 12 and the outlet of the second exhaust pipe 13 are flowed with different mass flow rates of gas.

[0043] Table 1

[0044] With the center of the air intake 11 as the reference point for torque calculation, the different yaw moments generated by the nozzle cylinder 1 in the state of no yaw moment and the state of generating the first type of yaw moment are shown in Table 2. This is equivalent to the yaw vector angle of the nozzle cylinder 1 being -2.8° when the pressure ratio of the nozzle cylinder 1 is 3, and the yaw vector angle of the nozzle cylinder 1 being -2.4° when the pressure ratio of the nozzle cylinder 1 is 4.

[0045] Table 2

[0046] In summary, the self-bleeding yaw aerodynamic vector nozzle with symmetrical outlet proposed in this application has good yaw vectoring potential.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets, characterized in that, It includes a nozzle body (1), an air intake assembly (2), and a switching assembly (3); The nozzle body (1) includes an air inlet pipe (11), a first air outlet pipe (12), and a second air outlet pipe (13). Both the first air outlet pipe (12) and the second air outlet pipe (13) are connected to the air inlet pipe (11), and are symmetrically arranged about the axis of the air inlet pipe (11). The first air outlet pipe (12) has a first air intake on its side near the end of the air inlet pipe (11) and facing the second air outlet pipe (13). 14) The first air outlet (12) is provided with a first air outlet (15) on the side facing the second air outlet (13) at the end away from the air inlet (11), the second air outlet (13) is provided with a second air inlet (16) on the side facing the first air outlet (12) at the end near the air inlet (11), and the second air outlet (13) is provided with a second air outlet (17) on the side facing the first air outlet (12) at the end away from the air inlet (11). The bleed air assembly (2) includes a first bleed air pipe (21), a second bleed air pipe (22), a first air inlet valve (23), a second air inlet valve (24), a first control structure (25), and a second control structure (26). The first bleed air pipe (21) connects the first bleed air inlet (14) and the second bleed air outlet (17). The second bleed air pipe (22) connects the second bleed air inlet (16) and the first bleed air outlet (15). The first air inlet valve (23) is rotatably mounted on the side of the first bleed air inlet (14), and the second air inlet valve (24) is rotatably mounted on the side of the second bleed air inlet (16). The first control structure (25) is used to drive the first air inlet valve (23) to rotate to close or open the first bleed air inlet (14), and the second control structure (26) is used to drive the second air inlet valve (24) to rotate. The intake valve (24) rotates to close or open the second intake air inlet (16); the first intake air pipe (21) and the second intake air pipe (22) are arranged to cross each other, and the intersection of the first intake air pipe (21) and the second intake air pipe (22) has four openings, namely the first opening (27), the second opening (28), the third opening (29) and the fourth opening (210). The first opening (27) and the second opening (28) are located on the side wall of the first intake air pipe (21), and the third opening (29) and the fourth opening (210) are located on the side wall of the second intake air pipe (22). The adjoining side of the first opening (27) and the third opening (29) faces the intake pipe (11), and the adjoining side of the second opening (28) and the fourth opening (210) faces the outlet side of the nozzle cylinder (1). The switching component (3) is installed at the intersection of the first air intake pipe (21) and the second air intake pipe (22). The switching component (3) is configured to: control the first opening (27) and the second opening (28) to open or close synchronously, control the third opening (29) and the fourth opening (210) to open or close synchronously, and control the fully open or closed states of the first opening (27) and the third opening (29) to be opposite.

2. The self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets according to claim 1, characterized in that, The air intake assembly (2) further includes an air intake control bracket (211) fixedly disposed relative to the nozzle cylinder (1) and located outside the nozzle cylinder (1). The first control structure (25) and the second control structure (26) are both motors fixedly mounted on the air intake control bracket (211). The output shaft of the first control structure (25) is fixedly connected to the first air intake valve (23) through the first connecting rod (212). The output shaft of the second control structure (26) is fixedly connected to the second air intake valve (24) through the second connecting rod (213). The first connecting rod (212) and the second connecting rod (213) are both partially located inside the nozzle cylinder (1) and rotatably connected to the nozzle cylinder (1).

3. The self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets according to claim 2, characterized in that, The first connecting rod (212) and the first air intake valve (23) are connected on the side near the junction of the first air outlet pipe (12) and the second air outlet pipe (13). The second connecting rod (213) and the second air intake valve (24) are connected on the side near the junction of the first air outlet pipe (12) and the second air outlet pipe (13). When the first air intake inlet (14) is open, the first air intake valve (23) is located in the first air intake pipe (21). When the second air intake inlet (16) is open, the second air intake valve (24) is located in the second air intake pipe (22).

4. The self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets according to claim 1, characterized in that, The switching component (3) includes a first adjusting plate (31), a second adjusting plate (32), and a driving structure (33). The first adjusting plate (31) is rotatably installed at the junction of the first opening (27) and the third opening (29). The second adjusting plate (32) is rotatably installed at the junction of the second opening (28) and the fourth opening (210). The driving structure (33) is used to drive the first adjusting plate (31) to close the first opening (27) or the third opening (29). The driving structure (33) is also used to drive the second adjusting plate (32) to close the second opening (28) or the fourth opening (210). The drive structure (33) is configured to: control the first adjustment plate (31) to close the first opening (27) or the third opening (29), control the second adjustment plate (32) to close the second opening (28) or the fourth opening (210), and control the first opening (27) and the second opening (28) to be in the same fully open or closed state.

5. The self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets according to claim 4, characterized in that, The drive structure (33) includes a switching control bracket (34), a rotary drive component (35), a drive gear (36), a first driven sector gear (37), and a second driven sector gear (38). The switching control bracket (34) is fixedly disposed relative to the nozzle cylinder (1). The axial position of the first driven sector gear (37) is fixedly connected to the first drive rod (39) and the first adjusting plate (31) near the junction of the first opening (27) and the third opening (29). The first drive rod (39) is rotatably connected to the side wall of the first air intake pipe (21) and / or the second air intake pipe (22). The axial position of the second driven sector gear (38) is fixedly connected to the second drive rod (310) and the second adjusting plate (32) near the junction of the second opening (28) and the fourth opening (210). The second drive rod (310) is rotatably connected to the side wall of the first air intake pipe (21) and / or the second air intake pipe (22). The drive gear (36) is rotatably mounted on the switching control bracket (34). The drive gear (36) meshes with the first driven sector gear (37) and the second driven sector gear (38) at the same time. The rotary drive (35) is fixedly mounted on the switching control bracket (34). The rotary output shaft of the rotary drive (35) is coaxially and fixedly connected to the drive gear (36).

6. The self-bleeding yaw aerodynamic vector nozzle with symmetrical outlets according to claim 5, characterized in that, The toothed side of the first driven sector gear (37) is located on the side of the first adjusting plate (31) away from the first drive rod (39), and the toothed side of the second driven sector gear (38) is located on the side of the second adjusting plate (32) away from the second drive rod (310). The toothed arc-shaped sides of the first driven sector gear (37) and the second driven sector gear (38) are arranged opposite to each other, and the driving gear (36) is located between the first driven sector gear (37) and the second driven sector gear (38).

7. The self-bleeding air yaw aerodynamic vector nozzle with symmetrical outlets according to claim 6, characterized in that, The intersection of the first air intake pipe (21) and the second air intake pipe (22) is a straight section, and the first driven sector gear (37) and the second driven sector gear (38) have the same radius.

8. The self-bleeding air yaw aerodynamic vector nozzle with symmetrical outlets according to claim 6, characterized in that, The first air intake pipe (21) and the second air intake pipe (22) are arc-shaped as a whole. The first adjusting plate (31) rotates at an angle of a degree from closing the first opening (27) to closing the third opening (29). The second adjusting plate (32) rotates at an angle of b degrees from closing the second opening (28) to closing the fourth opening (210). The radius ratio of the first driven sector gear (37) and the second driven sector gear (38) is b:a.

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