摘要
采用水槽试验对围堰附近的水流运动进行了系统的试验研究。通过详细分析围堰进、出口附近水流的断面流速分布以及沿程流速、水深变化规律,给出了分期导流围堰对河道水位和流场的影响,结果表明:围堰的存在对其上游流场的影响范围比它对水位的影响范围要小得多;围堰进、出口附近的水流运动呈现出明显的三维特性。
A This paper presents an experimental research on flow conditions close to the cofferdam. By analyzing the flow cross-sec- tional velocity distribution at the inlet and outlet of cofferdams and the streamwise velocity and depth variation, the influence of cof- ferdams on water level and flow field is concluded as follows.. The influence of cofferdams on flow velocity is smaller on the water level than on the upper reach. The flow close to the inlet and outlet of cofferdam is three-dimensional.
出处
《中国农村水利水电》
北大核心
2009年第4期91-93,97,共4页
China Rural Water and Hydropower
基金
国家自然科学青年基金项目(50609007)
水资源与水电工程科学国家重点实验室(武汉大学)开发基金资助项目(2006B028)
关键词
水槽试验
围堰
流场
水位
flume experiment
cofferdam
flow field
water level
