强激光大气传输中热晕的仿真研究

Numerical Simulation of Thermal Blooming Effect of High-Power Laser Propagation in the Atmosphere

采用数值仿真方法,研究了强激光在大气传输中的稳态热晕现象。具体研究了在吸收介质中,横向风以及激光的传输距离对热晕的影响。计算发现,横向风对热晕有抑制作用,风速越大,热晕效应越小,传输距离的增大会使热晕现象增强,传输效率降低。

Steady-state thermal blooming in atmospheric laser propagation is studied using numerical simulation.Variations of thermal blooming characteristics with the horizontal wind and high-energy laser propagation distance in absorbing medium are introduced concretely.Calculations found that the transverse wind has inhibitory effect on thermal blooming.The greater the wind speed is,the smaller the thermal blooming effect is.The increase of propagation distance can enhance the phenomenon of thermal blooming,and lower the propagation efficiency.