Controllable air inlet channel and method based on drainage gap switch

A technology of air intake and discharge, applied to the air intake of turbine/propulsion device, jet propulsion device, gas turbine device, etc., can solve the problems of engine flow mismatch, low Mach number and non-starting inlet, etc., to achieve The effect of widening the working range, reducing the starting Mach number and simplifying the structure

Active Publication Date: 2021-10-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to provide a controllable intake port based on the switch of the leak slit to solve the problem of non-starting at low Mach number and the mismatching problem of the intake port / engine flow in the fixed geometry intake port in a wide speed range

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  • Controllable air inlet channel and method based on drainage gap switch
  • Controllable air inlet channel and method based on drainage gap switch
  • Controllable air inlet channel and method based on drainage gap switch

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Embodiment Construction

[0021] The present invention will be further explained below in conjunction with the accompanying drawings.

[0022] Aiming at the start-up and flow matching problems of the fixed-geometry inlet, the invention proposes a controllable inlet and a method based on the leakage slot switch.

[0023] like figure 1 As shown, a controllable air inlet based on the leakage slot switch of the present invention includes an air inlet center body 1, and a fairing 4 is arranged on the air inlet center body 1, and a plurality of drainage slits are provided on the cowl 4 , the discharge slot includes an internal pressure section discharge slot 2 and an expansion section discharge slot 5, the internal pressure section discharge slot 2 is set on the internal pressure section of the fairing 4, and the expansion section discharge slot 5 is opened on the expansion of the fairing 4 section, the internal pressure section discharge slot 2 and the expansion section discharge slot 4 are multi-row; the ...

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Abstract

The invention discloses a controllable air inlet channel and method based on a discharge gap switch. The air inlet channel comprises an air inlet channel center body, a fairing is arranged on the air inlet channel center body, a plurality of discharge gaps are formed in the fairing, and the slotting area of the discharge gaps is controllable. According to the controllable air inlet channel and method based on the discharge gap switch, the air flow is directly discharged out of the air inlet channel by forming the discharge gaps in the air inlet channel fairing, the problem of an air flow path does not need to be specially considered, and the structure is simplified; the starting performance of the air inlet channel is improved, the starting Mach number of the air inlet channel is reduced, and the working range of the air inlet channel is widened; the flow of the air inlet channel is adjusted to meet the flow requirements of the engine under different flight working conditions; and the air inlet channel and the design thought can be applied to binary, axial symmetry, inward rotation and other types of air inlet channels.

Description

technical field [0001] The invention relates to a controllable air intake port and a method based on a leakage slot switch, and belongs to the field of aerodynamic design of the air intake port. Background technique [0002] At present, supersonic and hypersonic aircraft have become the focus of attention of various military powers. As one of the key components of the air-breathing propulsion system, the performance of the air-intake duct has an important impact on the aerodynamic performance of the air-breathing propulsion system and even the entire aircraft. To achieve wide-speed flight from ground takeoff to supersonic and even hypersonic speeds, the design of the air inlet is extremely critical. Its design requires that the inlet should not only work stably in a wide range, but also have high performance under the design state. The design of the inlet port is usually based on the high flight Mach number, but at the non-design point, the inlet port with fixed geometry d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C7/04F02C7/045F02C7/057F02K7/14
CPCF02C7/04F02C7/045F02C7/057F02K7/14
Inventor 袁化成刘甫州王鑫周珂玉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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