The invention relates to the technical field of aircraft design, and provides a method for reducing the infrared radiation signal intensity of a hypersonic aircraft, which comprises the following steps: adding a step with a backward air jet hole and the height of 10-30mm at a position, which is 2m away from the front edge to the middle part, of the hypersonic aircraft with the flow direction length of 3-10m; and in a flight period when aerodynamic heating of the hypersonic aircraft with the backward air jet port reaches a temperature threshold value and infrared stealth is needed, air is jetted into a wall surface boundary layer of the hypersonic aircraft with the backward air jet port from the backward air jet port, so that the infrared radiation intensity of the hypersonic aircraft with the backward air jet port is reduced. According to the method, the overall infrared radiation intensity of the aircraft is effectively reduced, and the stealth purpose is achieved; the air injection temperature is normal temperature, materials are convenient and cheap, the friction resistance of the wall surface is reduced within the downstream air injection action range of the step, and a certain resistance reduction effect is achieved on the whole hypersonic aircraft.

    本发明涉及飞行器设计技术领域,提供了一种降低高超声速飞行器红外辐射信号强度的方法,该方法包括:在流向长度为3‑10m的高超声速飞行器距前缘2m至中部的位置,加一个带有后向喷气口的台阶高度为10‑30mm的台阶;在后向喷气口高超声速飞行器气动加热达到温度阈值且需要红外隐身的飞行时段,由后向喷气口向后向喷气口高超声速飞行器的壁面边界层内喷气,以降低后向喷气口高超声速飞行器红外辐射强度。本发明的方法有效降低飞行器整体红外辐射强度,达到隐身目的;喷气温度采用常温,取材方便廉价,台阶下游喷气作用范围内,壁面的摩擦阻力降低,对高超声速飞行器整体起到一定的减阻作用。


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    Title :

    Method for reducing infrared radiation signal intensity of hypersonic aircraft


    Additional title:

    一种降低高超声速飞行器红外辐射信号强度的方法


    Contributors:
    GAO ZHENXUN (author) / DU CHUNHUI (author) / MO FAN (author) / JIANG CHONGWEN (author) / LI CHUNXUAN (author)

    Publication date :

    2022-01-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



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