摘要
分析了中强度激光作用下混合区对激光的吸收系数;求出了汽离混合区激光强度的时空分布;利用强度的时空分布和流体力学方程,近似的求得了混合区的约化密度、约化压强和速度分布,结果发现:①汽离混合区各处的约化密度和约化压强随时间成周期性分布,随位置坐标成指数规律增加,不同时刻的指数规律成周期性交替变化,随辐照激光波长成变周期性增加的变化;②"离子"喷射速度随位置坐标成线性分布关系;③各处的速度随波长成指数规律降低,不同位置的指数规律相近,但速度变化不大.
The absorption coefficient of mix area for laser had been analyzed under middling strength laser; the space-time distribution of laser strength had been given in the area of steam and ion mix;distribution of brief density and brief pressure and speed approximate had been given through the space-time distribution of laser strength and hydromechanics equation have used, then the results are: (1)brief density and brief pressure is periodically with time in any place, it's index law with coordinate to increase in any time; the index law changes periodically across at not identical time; it's changes periodically increase with laser wavelength in any place of the area of steam and ion mix; (2) speed of "ion" spurt is linear distribution relation with location ; and (3)speed of any place of the area of steam and ion mix is reduced with the index law according to the wavelength; if it's index law is close at not identical location, the speed change is not large.
出处
《西南师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2007年第4期8-13,共6页
Journal of Southwest China Normal University(Natural Science Edition)
基金
重庆市教委自然科学基金资助项目(KJ061308)
关键词
激光辐照
汽离混合区
状态参量
影响因数
laser irradiation
the area of steam and ion mix,state parameter
influence factor