排水洞出口斜交河道挑流鼻坎优化研究  

Study on Optimization of Flip Bucket at Outlet of Drainage Tunnel Obliquely Crossing the River Course

作　　者：朱艳德 王韦[1] 田忠[1] 王澳华 杨昊 ZHU Yan-de;WANG Wei;TIAN Zhong;WANG Ao-hua;YANG Hao(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《水电能源科学》2021年第3期67-69,144,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51879178)。

摘　　要：因工程布置需要,某水电站渣场排水洞与出口河道以60°夹角斜向上游相交,可能导致河道岸边涌浪过大、流速过快等问题,对此提出了扩散式舌形坎这种新型挑坎形式。在1∶25的水工物理模型上对燕尾坎、舌形坎及扩散式舌形坎进行试验研究,对比分析了3种挑坎体型的水舌入水形态、岸边流速、河道涌浪高度等参数,试验结果表明扩散式舌形挑坎具有横向扩散宽度大、挑距适中、挑射水流对下游河道影响小等优点,可有效解决洞轴线与出口河道大角度斜交情况下的水舌落点控制及消能问题,具有较好的应用前景。Due to the need of project layout,the drainage tunnel of the slag yard of a hydropower station is inclined to the upstream at an angle of 60°with the outlet channel,which may lead to the problems such as excessive swell on the riverbank and too fast flow rate.The experimental study of swallow-tailed flip bucket,tongue bucket and diffused flip bucket with tongue-type was carried out on the 1∶25hydraulic physical model,and the parameters such as the fluid state of water tongue,flow velocity,river surge height of the three types of flip bucket were compared and analyzed.The experiment results show that the diffused flip bucket with tongue-type has large lateral diffusion width,jet trajectory distance from moderate,the advantage of small flow impact on the downstream river channel,which can effectively solve the tunnel axis and the large angle oblique cases of downstream river channel flow nappe point control and energy dissipation problem.Thus,it has good application prospect.

关 键 词：排水洞 模型试验 扩散式舌形坎 水舌 消能 

分 类 号：TV135.2[水利工程—水力学及河流动力学]