台阶式溢洪道各流况的消能特性  

The characters of energy dissipation under different flows on stepped spillways

作　　者：田嘉宁[1] 大津岩夫 李建中[1] 安田阳一[2] 

机构地区：[1]西安理工大学水电学院,陕西西安710048 [2]日本大学

出　　处：《水利学报》2003年第4期35-39,共5页Journal of Hydraulic Engineering

基　　金：陕西省教育厅基金项目(01JK183)

摘　　要：在斜坡角度θ=19°的台阶式溢洪道上,变化其来流量、台阶高度及相对坝高等条件,对跌落水流、过渡水流及滑行水流,下游消力池形成临界水跃的跃前、跃后消能率进行了对比试验研究。试验结果表明,在试验条件范围内,以上三种流态的消能率差别甚小,总消能率最大可达95%左右,其中跃前的消能率占85%以上。The authors conducted a series of expriments on energy dissipation due to hydraulic jump.Comparison was made between energy dissipation ratios before and behind a hydraulic jump of critical jump created in downstream stilling basins under different flows of nappe flow,skimming flow and transition flow on a stepped spillway with an angle θ=19°.The discharge,step height and dam height were also changing.The experiment results proved that the differences between the energy dissipation ratios under the three flows were very small and the total energy dissipation ratio would amount to 95% at its maximum while the energy dissipation ratio before a jump shared over 85%.

关 键 词：台阶式溢洪道 滑行水流 过渡水流 跌落水流 水跃消能 

分 类 号：TV135.2[水利工程—水力学及河流动力学]