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高速飞行器在大气层中高速飞行时,其头罩表面受大气气流的影响产生严重的气动光学效应。头罩周围湍流流场的高频变化,将影响来自目标的红外辐射光线的传输,使导引头成像器中目标图像产生模糊、抖动、偏移和能量衰减,给红外成像末制导带来不利影响,降低导引头对目标的探测、跟踪与识别能力,进而影响末制导精度。以红外成像制导技术在高速拦截器上的应用需求为背景,进行了高速湍流流场光学传输效应理论计算基本方法的分析,介绍了建立的数学模型和仿真软件,最后给出了典型状态下的计算结果。
When the high-speed aircraft is flying at high speed in the atmosphere, the surface of the hood is affected by the atmospheric airflow and has a serious aerodynamic optical effect. The high-frequency variation of the turbulent flow field around the hood will affect the transmission of the infrared radiation from the target, causing blurring, jitter, offset and energy attenuation of the target image in the seeker imager, thus bringing about adverse effects on the infrared imaged final guidance Influence, reduce seeker’s target detection, tracking and identification ability, thereby affecting the terminal guidance accuracy. Based on the application requirements of infrared imaging guidance technology in high-speed interceptor, the basic method of theoretical calculation of optical transmission effect in high-speed turbulent flow field is analyzed. The mathematical model and simulation software are introduced. Finally, Calculation results.