摘要
本文应用PIV流场测量方法,对直通道内置肋板的绕流,进行了研究。流动Re数达到100000,肋板与通道高度之比H/L分别为0.1、0.2。实验结果表明: (1)PIV处理得到的肋板后的分离绕流,在不同的时刻,流动形态是不同的,是不规则的、非稳定的流动;(2)一定数量的测量结果经平均后得到结果有一定的稳定性,反映流动有一定的周期性; (3)PUV测量的平均结果与2D定常数值模拟结果有一定的差距。
The separated flow through the ribbed straight channel is investigated with Particle Image Velocimetry. Flow Reynolds number reaches 100000. Ratios of rib to channel height are 0.1 and 0.2 respectively. Experiment results from PIV post-process show that: (1) the separated flow field behind the rib is unsteady and chaotic; (2) the averaged flow pattern from certain amount of chronically obtained velocity field is relatively steady and indicates cycle period. (3) two dimensional numerical simulation deviates from PIV measurement and does not reflect the nature of separated flow.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第4期596-598,共3页
Journal of Engineering Thermophysics
基金
上海市教委重点项目资助(No.04EA02 No.03GK07)
关键词
PIV测量
分离流动
肋板绕流
particle image velocimetry
separated flow
ribbed channel
