高速流场下凸台周围的气动光学效应

针对高速流场下凸台周围的气动光学效应，对不同马赫数下的三种凸台形状周围的流场进行仿真计算，计算得到流场的密度变化，计算了光线经流场传输后的光程差。仿真结果表明:随马赫数增大，光程差逐步增大；同等条件下，不同出射角度对应的光程差不同，凸台存在强烈的尾流区域，从而导致较大的光程差；在马赫数达到跨音速时，凸台顶端也会产生较大的光程差；曲率较小的凸台结构对周围流场的影响较小。

Aero-optical effect around turrets in high speed regime

This study simulated the aero-optical effect around the turret at different Mach numbers for three turret designs, calculated the density distribution of the flow field and the optical path difference after transmission in the flow field. The optical path difference increases with the increase of Mach number. The optical distortion over the turret field-of-regard is dependent on the beam direction, and there is large optical distortion in wake area. When the speed reaches transonic, the top of the turret will also produce large optical distortion. For different turret designs, the smaller the curvature, the smaller the aero-optical effect.