摘要
本文发表了一种共轴型二维激光测速系统,可同时测量由三束入射光组成的平面内的二维速度分量。讨论了主要的测量误差并提出了一种修正共轴分量角度偏差的方法。应用该系统详细测量了单孔板和双孔板管流的轴向和径向平均速度。湍流度和雷诺切应力分布,表明来流条件对孔板下游的湍流特性有强烈影响。
An on-axis 2-D LDV system for measuring two velocity components in the plane formed by three incident beams was presented. The measuring errors in on-axis direction were discussed and a method for correcting the angular deviation was suggested. Detailed measurements were made in a pipe flow for single and double orifice cases by using: this system. Mean velocity, turbulent intensity and Reynolds shear stress distributions in axial and radial directions were measured at the Reynolds number of 1.4×105.Comparisons between single and double orifice cases show that the incoming flow condition is of significance influence to all the relevant turbulent characteristics downstream the orifice.
出处
《力学学报》
EI
CSCD
北大核心
1991年第2期225-231,共7页
Chinese Journal of Theoretical and Applied Mechanics
关键词
激光测速系统
湍流
测量
孔板流动
laser Doppler velocimetry, turbulence measurement, orifice flow
