针对序列长脉冲激光,提出了衡量序列长脉冲激光热晕效应强度的热畸变参数,建立了序列长脉冲激光热晕效应的数值仿真模型,并进行了实验验证。对比分析后发现实验结果与仿真结果在光斑形态和大小方面具有较好的一致性,从而验证了序列长脉冲激光热晕效应的数学物理模型及仿真算法的可靠性。在此基础上,通过改变大气参数及发射系统参数进行大量的数值仿真,得出由序列长脉冲激光热晕效应引起的光斑扩展与热畸变参数的定量关系,即序列长脉冲激光热晕效应的定标规律。

Thermal distortion parameters are proposed to evaluate the intensity of thermal blooming effect of repetitively long pulse laser. A numerical simulation model of thermal blooming effect of repetitively long pulse laser is established, and experiments are carried out. By comparing the simulation results with the experimental results, we find that the experimental results are agree well with the simulation results in terms of spot shape and size, which verifies the reliability of the mathematical-physical model of repetitively long pulse laser and the simulation algorithm. On this basis, the quantitative relationships between the spot expansion and the thermal distortion parameters caused by the repetitively long pulse thermal blooming effect, named scaling laws of thermal blooming effect of repetitively long pulse laser, are obtained by a large number of numerical simulations under different atmosphere parameters and launching system parameters.