侧窗头罩高速层流流场光学传输效应数值模拟

Numerical simulation on the optical transmission distortions throughout the laminar flow field

高速流场光学传输效应是影响红外成像末制导技术在高速导弹上应用的关键。研究了气动光学传输效应中层流流场光学传输分量的计算方法,应用光线追迹法和物理光学方法研究层流流场引起的像偏移和低程度的像模糊,结合典型状态下的流场数据,进行了高速层流流场光学传输效应的数学仿真,得到了仿真计算结果。采用实际计算出的流场数据,得出的计算结果与工程计算的结果相比较,证明所建立的气动光学高速流场光学传输效应理论模型基本正确,可以用来进行仿真计算。

The high speed flow optical transmission effect is a key to high speed missile using infrared image terminal guidance technology. In this paper, computing methods of the optical transmission distortions throughout the laminar flow field in aero-optical effects are described. Image shift and low blur brought by laminar flow are calculated using optical methods of ray trace and physical optics. The approaches and some simulation results are presented with computed data of high speed flow field. Comparison with the engineering results shows that the high speed flow field optical transmission theory model is correct and the numerical simulation software can be used to analyze the aero-optical effects.