摘要
本文在 Chen 和 G.Klingenberg 提出的激光电离原理的基础上,发展了一种用序列脉冲激光形成一组等离子体示踪测量气流速度—时间曲线的新方法。在已完成的测量中,速度范围可达120m/s～2300m/s,相对误差为2.3%.本文对等离子体示踪特性进行了详细讨论.这种方法特别适合于高超音速非定常流场,已研制成完整的测量系统 LVG-1。
Based on Chen-Klingenberg's laser-induced gas break down theory,a novel method is developed to trace and measure velocity-time relation of certain gas flow.This method is made use of a group of plasma produced by sequential pulse laser.In our tests, velocity range varies from 120 to 2300m/s with a relative error of 2.3 percent.The tracing characteristics of plasma is discussed in detail.This method is especially good for measuring unsteady hypersonic flow field.An integrated measuring system LVG-1 has been devel- oped.
出处
《实验力学》
CSCD
北大核心
1992年第4期345-350,共6页
Journal of Experimental Mechanics
关键词
非定常流
速度测量
等离子体
unsteady flow
velocity measurement
plasma
