强激光与自由射流剪切层的相互作用

Interaction between high-energy laser beam and free shear layer

在论述光场与流场相互作用规律的基础上,以激光束穿过二维超音速自由射流剪切层流场为物理模型,研究了由于辐射加热强激光束对流场的干扰以及激光束穿过模型流场并在静止大气中作远距传播后光强分布的变化。结果表明模型流场对激光束远场强度分布有明显影响,流场密度分布的微小变化都会使光束远场强度分布产生明显的不同;在强激光与高速流场相互作用的过程中,如果辐射加热机理与文中的情况类似,强激光束的辐射加热对流场所造成的干扰可以忽略。

Based on the discussion of the law of the interaction between optic\|field and fluid\|field, and by using the physical model that high\|energy laser beam cross through the two dimension super\|sonic free shot flow, the disturbance of the fluid\|field which caused by radiation heating and the changing of laser beam′s intensity after the beam passes through the fluid field and propagates a long distance in the static atmosphere are discussed. The results show that there′s a distinctness influence of fluid\|field on optic\|field. Furthermore, if the interaction of high\|speed fluid\|field is with high\|energy laser, the radiation heating can be neglected. \;