Controllable air inlet channel and method based on drainage gap switch

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...

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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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