基于激光靶冲量及耦合系数的激光吸收区组分判定  

Determination of Component in Coronal Region Based on Impulse and Coupling Index Between Laser and Target

作　　者：朱金荣[1] 杨波[1] 杨雁南[1] 沈中华[1] 陆建[1] 倪晓武[1] 

机构地区：[1]南京理工大学理学院

出　　处：《弹道学报》2007年第3期89-92,96,共5页Journal of Ballistics

基　　金：国家自然科学基金资助项目(60578015;60208004);教育部博士点基金项目(20050288025);教育部高校优秀青年教师奖励计划资助项目

摘　　要：在分析激光与靶材相互作用时伴生的纵向稀疏波和横向稀疏波对激光支持爆轰波的影响的基础上,提出了利用稀疏波与冲击波作用时间为时间标度,通过数值模拟计算了激光作用于靶的冲量,数值模拟得到的冲量值与实验所得到的冲量值吻合较好,验证了文中理论研究结果的正确性.根据不同功率密度的激光束作用于靶材时比热比的差异,确定了激光吸收区内气态粒子和离化粒子的组分.Considering the influence of the rarefaction wave both in lateral and forward directions which is generated in the interaction between laser and target on the detonation wave, the time scale of shock and rarefaction was presented. The impulse on the target was calculated by numerical simulation. The result agrees with the experimental data very well, which confirms the correction of theory model. The component in the shock region can be determined according to the difference of specific heat ratio varying with laser power density.

关 键 词：激光吸收区 比热比 冲量 

分 类 号：O439[机械工程—光学工程] TN249[理学—光学]