摘要
为了研究激光推进器辅助启动机理,使用Nd:YAG固体脉冲激光器,并通过凸透镜聚焦光束来击穿工质,采用快速运动分析仪与纹影仪两种测量方式相结合,清楚地拍摄到了激光等离子体发光的照片和波后气流扰动纹影照片,估算出了等离子体持续时间及其他特征参数。实验中通过改变工质参数,等离子体波的空间尺寸及持续时间明显变化;实验发现采用不同的辅助启动方式会对激光推进器性能产生明显的影响。
In order to study the form mechanism of Laser Supported Detonation （LSD） in Laser Propulsion, an experiment was made. YAG laser 2J/pulse with pulse - width of 5 nsec, focalized through the convex lens and exploded around the focus. Using the Hi - spec processor and schlieren apparatus in the experiment the emission images of laser sustained plasma and schlieren images of disturbed air field were obtained, and then the duration time of plasma and other characteristic parameters were calculated. By changing the material parameters, the plasma wave＇s magnitude increased obviously, the duration time lengthened the threshold value of LSD fell distinctly.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2006年第6期13-15,75,共4页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家"973"计划资助项目
关键词
激光推进
等离子体
冲击波
纹影测量
laser propulsion
plasma
detonation wave
schlieren measure
