激光大气传输数值模拟中对计算参量的选取

Choosing Computing Parameters in the Numerical Simulation of Laser Propagation Effects

根据数值计算的抽样原则、传输介质的特性及传输效应等,对激光大气传输数值模拟中计算参量的选取进行了比较全面的分析,总结了选取计算参量时应遵循的基本要求。针对湍流效应、稳态热晕效应数值模拟中横向抽样网格间距和传输步长的选取分别进行了分析,并得到了这些计算参量与大气传输效应特征参量的关系,从而为激光大气传输的数值仿真提供依据。

In the numerical simulation of laser propagation effects, how to choose the computing parameters correctly is impontant. Based on the sample principle of numerical calculation, the properties of transmission medium, the laser propagation effects and the choice of computing parameters are analyzed. Especially, for the turbulence effect and the steady-state thermal blooming effect, criterions for choosing the grid spacing and the transmission step length are obtained. According to these criterions, computing parameters can be chosen correctly and the effects of laser propagation can be evaluated effectively in the real atmosphere from numerical calculation results.