A combined power intake with a translational linkage flow regulation and variable geometry device and its working method

Abstract

A combined power intake duct with a translational linkage flow regulation geometry device and its operating method are disclosed. This invention features a wide-range intake flow regulation range. Based on the principles of changing the capture flow and increasing the throat flow capacity for stable intake operation, this invention proposes a linkage flow regulation geometry device involving the translational lip and throat. The geometry device consists of a translational lip, a translational throat, and a four-bar linkage. It can achieve multi-dimensional optimization of intake performance by coordinating and controlling the actual capture flow and throat compression through single-degree-of-freedom adjustment. The geometry device operates in two states during movement: 1) When the four-bar linkage moves backward, the actual capture flow decreases, the ram throat height increases, and the turbine throat height decreases; 2) When the four-bar linkage reaches a certain position and continues to move backward, the actual capture flow decreases, the ram throat height decreases, and the turbine throat height increases.

Description

Technical Field

[0001] This invention relates to a combined power air intake with a translational linkage flow regulation and variable geometry device and its working method, which belongs to the field of aerospace vehicle aerodynamic design. Background Technology

[0002] For air-breathing aircraft, the excellent aerodynamic performance of the air intake under design conditions does not guarantee normal and stable operation under all critical operating conditions. Especially for air-breathing aircraft operating over a wide Mach number range, when operating in non-design conditions, the ability of the air intake to provide sufficient airflow to the engine with minimal drag and flow losses to meet certain airflow quality requirements is an important criterion for evaluating the overall aerodynamic performance of the air intake.

[0003] For subsonic inlets used in low-speed aircraft, matching the airflow between the inlet and engine is relatively simple. When flight conditions change, the inlet can automatically adjust the relationship between the free-flow tube area and the capture area according to the engine's airflow requirements, thus achieving automatic airflow regulation. As the flight envelope of aircraft gradually expands, and flight speeds gradually extend from subsonic to supersonic and hypersonic, fixed-geometry inlets struggle to meet the operating requirements across a wide Mach number range. At this point, variable-geometry inlet design technology demonstrates advantages in solving the airflow matching between the inlet and engine under non-design conditions and in low-Mach number self-starting, and is gradually gaining widespread recognition and attention in the industry.

[0004] Currently, most mainstream hypersonic horizontal takeoff and landing propulsion systems adopt the form of TBCC power. Common combined power intake geometry methods are mostly designed for dual-channel switching. Based on dual-channel mode switching, the dual-channel performance is limited. The intake itself captures flow and the dual-channel flow distribution are limited by the geometry method. Therefore, in order to meet the intake flow adjustment needs and performance requirements of a wider speed range, and to ensure that the flow and throat size can be adjusted in multiple speed ranges, it is necessary to ensure that the dual-channel intake flow and throat can be freely adjusted when the turbine is working, and that the ramjet channel throat size and intake capture flow can be adjusted when the ramjet is working.

[0005] To address the challenge of limited multi-channel flow capture and distribution regulation capabilities in TBCC inlets, it is essential to develop a combined power inlet with a translational linkage flow regulation variable geometry device and its operating method. Summary of the Invention

[0006] This invention discloses a combined power intake duct with a translational linkage flow regulation geometry device and its operating method. The wide-speed-range intake duct offers a large flow regulation range. Based on the principles of changing the capture flow and increasing the throat flow capacity for stable intake operation, this invention proposes a linkage flow regulation geometry device involving the translational lip and throat. The geometry device consists of a translational lip, a translational throat, and a four-bar linkage. It can achieve multi-dimensional optimization of intake duct performance through single-degree-of-freedom adjustment and coordinated control of the actual capture flow and throat compression.

[0007] The technical solution of this invention:

[0008] A combined power intake duct with a translational linkage flow regulation and variable geometry device includes an external pressure wave system 1, a front compression plate 2, a fixed front body 6, a rear compression plate 7, a ram air passage 8, a turbine passage 9, and a variable geometry device. The variable geometry device includes a retractable lip plate 3, a side four-link 4, and a vertically movable diverter wedge 5. The retractable lip plate 3 can only move horizontally. The lower end of the retractable lip plate 3 is rotatably connected to the upper end of the side four-link 4 at a fixed position, and the lower end of the side four-link 4 is rotatably connected to the upper end of the vertically movable diverter wedge 5 at a fixed position. When the retractable lip plate 3 moves left or right, the vertically movable diverter wedge 5 moves up and down, thereby changing the height of the ram throat and turbine throat of the intake duct.

[0009] The variable geometry device has two working states during the movement:

[0010] (1) The side four-link 4 is moved back, the actual captured flow of the intake is reduced, the height of the intake ram throat is increased, and the height of the turbine throat is reduced.

[0011] (2) When the side four-link 4 reaches a certain position and continues to move backward, the actual captured flow of the intake duct decreases, the height of the intake ram throat decreases, and the height of the turbine throat increases.

[0012] The combined intake duct completes the power unit mode conversion through the rotation of the internal compression regulating plate, and the flow distribution between the two channels can be adjusted by the translational linkage flow regulation geometry device.

[0013] The beneficial effects achieved by this invention are as follows: This technical solution overcomes the problem of limited multi-channel flow capture and distribution adjustment capability of TBCC intake, meets the intake flow adjustment needs and performance requirements of a wider speed range, and the flow and throat size can be adjusted in multiple speed ranges. When the turbine is working, the flow and throat of the dual-channel intake can be freely adjusted. When the ramjet is working, the throat size of the ramjet channel and the intake capture flow can be adjusted. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a combined power intake with a translational linkage flow regulation and variable geometry device;

[0015] Figure 2 yes Figure 1 A schematic diagram of another working state of the medium-distance linkage flow regulation variable geometry device;

[0016] Meaning of the reference numerals in the diagram:

[0017] 1-Intake duct external pressure wave system, 2-Intake duct front compression turn plate, 3-Intake duct telescopic lip plate, 4-Side four-link, 5-Upward and downward movable diverter wedge, 6-Intake duct fixed front body, 7-Intake duct rear compression turn plate, 8-Ram press channel, 9-Turbine channel. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] A combined power intake duct with a translational linkage flow regulation and variable geometry device includes an external pressure wave system 1, a front compression plate 2, a fixed front body 6, a rear compression plate 7, a ram air passage 8, a turbine passage 9, and a variable geometry device. The variable geometry device includes a retractable lip plate 3, a side four-link 4, and a vertically movable diverter wedge 5. The retractable lip plate 3 can only move horizontally. The lower end of the retractable lip plate 3 is rotatably connected to the upper end of the side four-link 4 at a fixed position, and the lower end of the side four-link 4 is rotatably connected to the upper end of the vertically movable diverter wedge 5 at a fixed position. When the retractable lip plate 3 moves left or right, the vertically movable diverter wedge 5 moves up and down, thereby changing the height of the ram throat and turbine throat of the intake duct.

[0020] like Figure 1 As shown, if the four-bar linkage moves backward at this time, the actual captured flow rate of the intake duct decreases, the height of the intake ram throat increases, and the height of the turbine throat decreases.

[0021] like Figure 2 As shown, at this point, the four-bar linkage continues to move backward, reducing the actual intake flow rate, decreasing the intake ram throat height, and increasing the turbine throat height.

[0022] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A combined power intake with a translational linkage flow regulation and variable geometry device, characterized in that, It includes an external pressure wave system (1) for the intake duct, a front compression turn plate (2) for the intake duct, a fixed front body (6) for the intake duct, a rear compression turn plate (7) for the intake duct, a ram air passage (8), a turbine passage (9) and a variable geometry device; the variable geometry device includes a telescopic lip plate (3) for the intake duct, a side four-link (4) and a vertically movable diverter wedge (5); the telescopic lip plate (3) for the intake duct can only move horizontally, and the lower end of the telescopic lip plate (3) is rotatably connected to the upper end of the side four-link (4) at a fixed position, and the lower end of the side four-link (4) is rotatably connected to the upper end of the vertically movable diverter wedge (5) at a fixed position; when the telescopic lip plate (3) for the intake duct moves left and right, the vertically movable diverter wedge (5) will move up and down, thereby changing the height of the ram throat and turbine throat of the intake duct; The variable geometry device has two working states during the movement: (1) when the side four-link (4) moves backward, the actual captured flow of the intake duct decreases, the height of the intake ram throat increases, and the height of the turbine throat decreases; (2) when the side four-link (4) reaches a certain position and continues to move backward, the actual captured flow of the intake duct decreases, the height of the intake ram throat decreases, and the height of the turbine throat increases. The combined intake duct completes the power unit mode conversion through the rotation of the internal compression regulating plate, and the flow distribution between the two channels can be adjusted by the translational linkage flow regulation geometry device.

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