：针对高超音速飞行器在大气中流动时所产生的气动光学效应进行定性和定量的分析与计算。通过对高速湍流流场N-S 方程的CFD 求解，得到在不同飞行参数下，飞行器外围流场的各种参数分布；再运用变折射率流场的光线追迹法，得到红外光在该非均匀变折射率流场中的传输路径；最后应用傅里叶光学理论，结合数值分析方法，计算得到高速湍流流场的气动光学效应传输函数。计算结果表明，气动光学传输函数的幅度响应函数具有低通特征，使得图像发生像模糊；其相位响应函数具有非线性的特点，导致红外成像非线性偏移。本文所得实验结果与理论分析相吻合。

Numerical simulation and analysis of aero-optic effects caused by the hyper-speed turbulence fields under different flight conditions were carried out. The aero-optic effects were characterized with the associated optical transfer functions. First, the analysis and computation of the aero-optic effect under different flight conditions were addressed, where the parameters characterizing the hyper-speed turbulence field were obtained by solving its N-S equations via CFD methods. The infrared ray trajectories passing through a flow field of non-homogeneous refraction indices were acquired with the gradient index ray-tracing method, and the transfer function to represent the aero-optic effects was derived using the principles of Fourier optics. The simulation results showed that the aero-optic transfer function is characterized as a low-pass filter, which results in the blurring and shifting of the objects in the acquired images.