摘要
在高超声速风洞试验中,用普通纹影仪配上单次亚微秒火花光源,组成亚微秒火花聚焦阴影系统,同时采用延时同步器控制闪光时间,在同一次吹风试验中,用普通相机拍摄出振荡频率达3000Hz 的激波运动周期过程。文中提供的一组照片清晰地显示出激波、分离区及激波与边界层的干扰,可以看出激波传播状况,这对分析研究是很有用处的。
This paper introduces a system of submicrosecond sparkfocused shadowgraph using a conventional schlieren matching single sub-microsecond spark light source in hypersonic wind tunnel experiments,and at the same time,a delayed synchronizer is used to control flashingtime.In the once wind tunnel experiment,the cycle process of shock wavemovement whose oscillation frequencies up to 3000Hz is photographed bya reflex camera body.A group of photographs clearly showing the shockwave,separated flows region and shock-boundary layer interactions arepresented.It is very useful to analysis and research.
关键词
激波振荡
火花光源
纹影仪
shock oscillation
spark light source
schlieren
focused shadowgraph
delayed synchronizer
