Method and device for improving aerodynamic stability of carrier-based aircraft engine based on state recognition

Abstract

The application belongs to the technical field of carrier-based aircraft engine design, and in particular relates to a method and device for improving the aerodynamic stability of a carrier-based aircraft engine based on state identification. The method includes firstly acquiring the landing gear state, flight altitude, engine Mach number and engine throttle lever position information of the aircraft; then determining the validity of the take-off state identification signal of the aircraft; further determining the flight state of the aircraft, and finally setting the aircraft respectively The compressor inlet adjustable stator blade angle control law and the engine nozzle control law under different flight conditions improve the aerodynamic stability of the engine. Through this application, according to the environment in which the engine is used, the geometric area control methods of a2 and A8 are classified and designed in detail according to the flight state, take-off / catapult take-off state, and landing / go-around state, which can greatly improve the aerodynamic stability of the engine and greatly increase the shipboard capacity. Aircraft engine aerodynamic stability working margin.

Description

technical field [0001] The application belongs to the technical field of carrier-based aircraft engine design, and in particular relates to a method and device for improving the aerodynamic stability of a carrier-based aircraft engine based on state recognition. Background technique [0002] Due to the special environment of take-off and landing on the ship, the use of carrier-based aircraft engines is somewhat different from that of land-based engines. For example, when landing on the ship, the aircraft needs to be controlled precisely, and if the arrest is unsuccessful, it is necessary to go around immediately. The characteristics require that the accelerated fuel supply is increased compared with the normal land-based engine, which will have an adverse effect on the aerodynamic stability of the engine. For steam catapult carrier-based aircraft, the engine inlet may inhale the steam leaked from the catapult at the moment of catapult take-off. The above characteristics of ...

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Problems solved by technology

[0003] At present, the aerodynamic stability design of carrier-based aircraft engines depends entirely on the engine's own stability margin, and no measures to improve aerodynamic stability have been proposed for the characteristics of carrier-based aircraft engines (such as take-off status and ejection status). Only α1, α2, A8, etc. The geometric control law is uniformly adjusted within the full envelope, and the aerodynamic stability of the engine has also been exposed many times during actual use.

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