吸、喷水法减小丁坝下游回流尺度的试验研究  

Experimental study on reducing the size of circulating region in the downstream of spur dikes

作　　者：马永军[1] 陈稚聪[1] 丁翔[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水科学进展》2003年第6期763-768,共6页Advances in Water Science

基　　金：中国三峡总公司基础性研究基金资助项目(95 3 2)

摘　　要：由于流动边界出现凸出障碍物引起边界层分离,导致回流发展、水流流态恶化等一系列问题,在水利、航道及电站等工程中是一种普遍存在的现象。从控制边界层的思路出发,采用"吸、喷"水方案,即在凸出障碍物与水流平行的边界略上部位将一部分边界层水流吸走,并在其下游喷出增加边界层的动量,可以减小障碍物下游的回流尺度。在50cm宽水槽中进行的试验表明,采用这种方法是非常有效的。Boundary layer is separated due　to the barrier along the flow border line, thus the circulating flow is strengthened and the flow pattern is deteriorated It is a common phenomenon in the project of water conservancy, sea-route and power station From the theory of boundary layer control, the size of circulating region in the downstream of the barrier　can　be　reduced　by　using the method of 　'sucking-spouting' water, which　 sucks part of the discharge in the upstream of the convex barrier and spouts it in the downstream of it. The results of tests in　the　50　cm　width flume show that the method of 'sucking-spouting' water is very effective

关 键 词：丁坝 边界层 回流长度 回流强度 喷流 断面 流速 

分 类 号：TV131.65[水利工程—水力学及河流动力学] TV863