PIV在二维后向台阶流实验研究中的应用

Study on 2D flow over a backward facing step flow with particle image velocimetry

利用粒子图像测速技术(PIV),对雷诺数150<Re<6 500 范围二维后向台阶的流动进行详细观测.实验给出时均流速分布、时均回流区长度和瞬态流动结构,探讨了后台阶分离流流动特性.

In a Reynolds number range of 150<Re<6500,a particle image velocimetry(PIV) is used to measure and visualize the 2D flow over a backward facing step. Mean velocity distribution,mean length of recirculation region and the structure of instant stream are presented by the experimental data,which help us understanding character of this flow further.