摘要
基于法布里-珀罗干涉仪的干涉瑞利散射测速技术原理,结合种子注入Nd∶YAG脉冲激光器、ICCD相机和高光谱分辨法布里-珀罗干涉仪,建立了一套干涉瑞利散射速度测量系统,系统的速度测量准确度为10m/s.对拉瓦尔喷管产生的超声速自由射流开展干涉瑞利散射速度测量,得到气流的流动速度为366m/s.在不需要外加任何示踪粒子的条件下,利用流场气体分子本身的瑞利散射,实现了对超声速流场速度的非接触测量.
The working principles of Interferometric Rayleigh scattering velocimetry using a Fabry-perot interferometer is presented.An interferometric Rayleigh scattering velocimetry apparatus consisted of a high resolution F-P interferometer,an injection-seeded Nd∶ YAG laser and an intensified CCD was developed.In theory,the measurement uncertainty of velocity is 10 m/s,the recommendations for system improvements were given.Non-intrusive measurement of velocity in unseeded gas flow is performed to demonstrate this technique,flow velocity of 366m/s was obtained in a supersonic free air jet flow.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2015年第1期201-204,共4页
Acta Photonica Sinica
基金
国家自然科学基金(No.11272337)资助
关键词
法布里-珀罗干涉仪
瑞利散射
超声速流动
速度
测量
Fabry-perot interferometers
Rayleigh scattering
Supersonic flow
Velocity
Measurement
