狭窄河道大交角溢洪道挑坎体型优化试验研究  

Research on optimizing flip bucket of a certain narrow river hydropower station spillway with big angle of skew

作　　者：徐兰兰[1] 刁明军[1] 岳书波[1] 冀承猛 

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 [2]东方电气集团国际合作有限公司,四川成都611731

出　　处：《西南民族大学学报（自然科学版）》2012年第2期316-319,共4页Journal of Southwest Minzu University(Natural Science Edition)

摘　　要：对具有代表性的某狭窄河道水电站大交角溢洪道挑坎的水力特性及出坎水舌对下游河道的冲刷进行试验研究,针对下游河道狭窄这一情况,试验研究了不同挑坎体型下出坎水舌的形态、入水点及对下游河床的冲刷,得出:侧扩斜坎方案能够将水舌在横向充分拉开,减小出口流速,使水舌入水点居于河道中心,从而减轻对河床及对岸岸坡的冲刷.Experiments are conducted on the hydraulic characteristics of spillway flip bucket and the scouring to downstream bed at a certain hydropower station.According to the condition of the narrow watercourse,the experiment research on the water shape,fall point of water jet and scouring to downstream bed under different flip bucket types show that,beveled flip bucket with sidewall diffused can make water tongue fully diffused on cross direction and fallen in the middle of the river bed,so that the outlet velocity decreases and the scouring to river bed and left bank reduces.

关 键 词：狭窄河道 大交角 溢洪道 挑坎 水力特性 冲刷 侧扩斜坎 

分 类 号：TV143[水利工程—水力学及河流动力学]