透射式水工质的高耦合效率激光推进模式  

High coupling coefficient laser propulsion mode

作　　者：张翼[1] 鲁欣[1] 郑志远[1] 刘峰[1] 朱鹏飞[1] 李汉明[1] 李玉同[1] 李英俊[1] 张杰[1] 

机构地区：[1]中国科学院物理研究所,北京100080

出　　处：《推进技术》2007年第5期534-537,共4页Journal of Propulsion Technology

基　　金：国家"九七三"项目(61328)

摘　　要：为了提高激光推进的耦合效率,防止光学器件污染,提出了透射式液体工质的激光推进模式。在这种推进模式中,Nd:YAG固体激光器中产生的450 mJ,7 ns激光穿过透明的玻璃基底后,与燃烧室中的液体推进剂相互作用,产生的等离子体在玻璃基底、燃烧室和液体推进剂的约束下膨胀,产生很高效率的动量转换,使靶获得初速度。纯水和黑墨水分别被用作推进剂,通过比较实验结果发现,在这种模式中墨水比水更适合做推进剂。通过改变燃烧室的长度和孔径,得到的耦合系数的最大值为17 858.3 N/MW。A high coupling coefficient laser propulsion mode--transmitted liquid-confined laser propulsion is proposed. In this mode, 450 mJ ,7 ns laser pulses transmit through a glass substrate and then are focused into the liquid propellant. The plasma generated by laser ablation is confined by the liquid propellant, burning room and glass substrate, and produce high efficient momentum transfer. Both water and ink are tested as propellants. By comparing with water, ink is chosen as a better propellant. The influences of diameter and length of the burning room for holding liquid on the coupling coefficient are studied. The maximum coupling coefficient got in the experiment is up to 17 858.3 N/MW.

关 键 词：激光推进 液体推进剂 耦合系数 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程] TN249[电子电信—物理电子学]