气动热环境下高速飞行器光学窗口光传输数值仿真研究

处在气动热环境中的光学窗口由于热传导和热应力等效应导致窗口材料外形和光学性质的变化,进而影响来自目标的红外辐射光线的传输,使目标图像产生模糊、抖动、偏移和能量衰减,给红外成像带来不利影响.以红外成像在高速拦截器上的应用需求为背景,进行了光学窗口光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.

NUMERICAL SIMULATION OF OPTICAL TRANSMISSION THROUGH HIGH SPEED AIRCRAFT OPTICAL WINDOW IN AERO-DYNAMIC THERMAL ENVIRONMENT

In the aero-dynamic environment, optical window's shape and optical property will be changed because of thermal transmission and thermal stress, then the transmission of the infrared radiation from the target will be affected, which will make the image fuzzy, flutter, departure and energy's attenuation, thus, the effectiveness of infrared image will be heavily affected. According to the requirement of IR imaging technique applied in high-speed interceptor, the optical transmission theory and basic calculating methods of optical window were studied. The mathematic model and simulation software were introduced. Some computer simulation results at classical state were presented.