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Aero-optical Effects Simulation Based on Turbulence Vortex Model

机译:基于湍流涡流模型的航空光学效果仿真

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For the simulation of aero-optical effects in engineering application, the influence of coherent structure on the optical transmission cannot be considered because RANS method ignores the details of the flow fluctuation. A random phase screen method based on turbulence sphere vortex model is improved to predict the optical distortion caused by instantaneous coherent vortex structure. The main idea of improvement is to relate the sphere vortex parameters to the local dynamic characteristic of the flow field. The simulation of optical distortion in compressible mixing layers shows that the improved random screen method has good agreement with the results from the direct integration of the intensity and the accuracy is great higher than the original method.
机译:为了模拟工程应用中的航空效应,由于RAN方法忽略了流动波动的细节,因此不能考虑相干结构对光学传输的影响。基于湍流球形涡流模型的随机相屏筛选方法得到改进,以预测瞬时相干涡结构引起的光学变形。改进的主要思想是将球形涡流参数与流场的局部动态特性相关联。可压缩混合层中光学变形的仿真表明,改进的随机屏方法与强度直接集成的结果良好,精度高于原始方法。

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