用序列脉冲激光等离子体示踪方法测量非定常流的速度——时间变化  

Measurement of Velocity-time Relation in Unsteady Flow by using Plasma Tracers Formed from Sequential Pulse Laser

作　　者：李鸿志[1] 王莹[1] 林太基 郭建国[1] 张勇[1] 

机构地区：[1]华东工学院

出　　处：《实验力学》1992年第4期345-350,共6页Journal of Experimental Mechanics

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.

关 键 词：非定常流 速度测量 等离子体 

分 类 号：O357[理学—流体力学]