A supersonic air inlet anti-breathing structure

Abstract

The invention relates to the field of supersonic inlets of aircrafts, in particular to an anti-surge structure for a supersonic inlet. The anti-surge structure comprises the inlet and an anti-surge actuator mechanism, a vent port is arranged nearby the exit position of the inlet, and the anti-surge actuator mechanism is located beside the vent port in the inlet and can close the vent port. The anti-surge actuator mechanism comprises an actuator cylinder base body, an actuator piston, a stop pin, a compression spring, a blind pin, a socket and a cover plate. A piston cylinder is formed in the actuator cylinder base body, the space between the socket and the actuator piston is filled with gunpowder, the cover plate is installed at one end of the actuator piston, a stop pin hole is formed in the side face of the piston cylinder, the stop pin is pressed on the side face of the actuator piston through the blind pin and the compression spring, and the socket is linked with an ignition control signal. The anti-surge structure solves the surge problem of the inlet, overflow resistance of the inlet is reduced, an extra lift effect is provided for an aircraft, no projectile exists in the vent port, other parts on the aircraft cannot be threatened, the structure is compact and simple, and influence on performance of the inlet is small.

Description

technical field [0001] The invention relates to the field of aircraft supersonic air inlets, in particular to a supersonic air inlet anti-breathing structure. Background technique [0002] According to the different airflow compression process, the supersonic inlet can be divided into three types: external pressure type, internal pressure type and mixed pressure type. For sonic aircraft, internal-pressure supersonic inlets are rarely used due to the difficulty of starting. Mixed-pressure supersonic inlets have both the advantages of external pressure and internal pressure, and ease the pressure of internal pressure supersonic inlets. It is difficult to start the road, and it can be used on supersonic aircraft with a flight Mach number above 2. In recent years, with the research and development and use of various supersonic aircraft, the types and numbers of supersonic aircraft have increased significantly, and the flight speed of supersonic aircraft has also been increasing...

AI Technical Summary

Problems solved by technology

[0005] The current technical scheme of blocking the inlet of the air inlet can solve the problem of air inlet surge when the flight speed is lower than the starting Mach number of the air inlet during the acceleration process of the aircraft by preventing the airflow from entering the air inlet. There is basically nothing that can be done about the large-scale problem of the inlet resistance before the inlet is started; and the design, manufacture and installation of the blocking cover are difficult; the throwing process of the overall external throwing type blocking cover is a threat to the aircraft fuselage; The fragments of the cover that are blown away from the intake duct after being blown up are likely to damage the airflow sensor in the intake duct and other components and equipment in the engine, etc.

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