气流加热对气动光学效应的影响

以光束穿过三维高速流场为物理模型,研究了由于辐射加热气流对流场的干扰及激光束穿过流场后光束远场的分布。应用二维哈特曼波前测量系统,对高功率光束在风洞高速气流传输中的气动光学效应进行了测量。结果表明，气流未电离情况下，激光与高速气流相互作用对气流的温度、密度等参数影响很小，通过该区域流场的光束波前基本没有变化。

Influence of airflow heating on aero optic effects

Based on the discussion of the law of the interaction between optic field and fluid field, we adopted the physical model for high energy laser beams crossing through three dimensional high speed flow. A two dimensional Hartmann wavefront sensor was used to measure the aero optic effects when the high energy laser beam passed through a high speed airflow in the wind tunnel. The density and temperature maps of fluid field and far field optical path difference map of laser beams were obtained. The disturbance of the fluid field caused by radiation heating and the changing of laser beam optics aberrations after the beam passing through the fluid field were discussed. The results show that the interaction between lasers and the high speed airflow has little influence on the temperature and density of the airflow when the air is not ionized.