摘要
为了克服传统的点测量方法无法获取明渠交汇口非恒定流场同部信息的缺陷 ,本文应用DPIV (DigitalPar ticleImageVelocimetry)数字粒子测速技术对明渠交汇口流场进行了实验研究。试验结果表明 ,对于给定交汇口形状及尺寸 ,分离区的大小主要随主支渠水流的流量比发生变化 ,但其形状基本保持不变。说明DPIV测速方法可直观完整地测量非恒定流动 ,且运算速度快 。
The principle of DPIV (digital particle image velocimetry)technology is introduced and an improved measuring system for experimental study on open channel flow was established based on this principle. The flow field at the confluence of two channels is obtained and studied in detailed. It is found that the separated flow area is varied with the ratio of the main channel discharge to side inflow channel discharge but the basic scheme does not changed, if the configuration and dimensions of the confluence is given.
出处
《水利学报》
EI
CSCD
北大核心
2003年第6期65-71,共7页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目 ( 500 790 0 8)
