水烧蚀激光推进性能初步分析  

Primary analysis for performance of laser propulsion with water propellant

作　　者：崔村燕[1,2] 洪延姬[2] 文明[2] 何国强[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072 [2]装备指挥技术学院,北京101416

出　　处：《推进技术》2010年第2期240-242,256,共4页Journal of Propulsion Technology

基　　金：国家"九七三"项目(61328);国家自然科学基金项目(10672184)

摘　　要：利用所建流场信息与推力信号同步采集的实验系统,开展了水烧蚀激光推进性能实验研究。研究发现,实验中随机出现两种特征差别明显的现象,即水烧蚀和水诱导的空气击穿。对两种现象获得的气蚀空穴发展、推力特征、冲量耦合系数、比冲和能量利用率进行了分析。结果表明,与水诱导空气击穿相比,水烧蚀获得的气蚀空穴发展较快、推力幅值、冲量耦合系数和能量利用率都高约10倍,比冲比较接近。研究结果对于水烧蚀激光推进的发展有重要意义。Experimental study on performance of laser-generated ablation propulsion is carried out with a set of system with which information of both flux-field and thrust loading can be gathered at the same time. Two phenomenons with obvious different characters are observed,which are water ablation and laser-induced air-breakdown with water as an induction. Developing speed is faster with water ablation than that with air-breakdown. Amplitude of thrust curve,impulse coupling coefficient and rate of energy conversion are about 10 times higher gained by water ablation compared with those obtained by air-breakdown. But special impulse of both phenomenons is close to the same value. The results are valuable for development of laser-induced ablation propulsion with water propellant.

关 键 词：激光推进 烧蚀 击穿 推进性能 

分 类 号：O439[机械工程—光学工程] TN249[理学—光学]