高水头大流量泄洪洞挑坎体型优化及下游冲淤研究  

Scour Downstream River and Optimum Geometry of Flip Bucket in Tunnel with High Head and Large Discharge

作　　者：余挺[1] 贺昌林[1] 张建民[1] 许唯临[1] 彭勇[1] 

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

出　　处：《四川大学学报（工程科学版）》2007年第4期20-25,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家杰出青年科学基金资助项目(50325928);国家自然科学基金委员会;二滩水电开发有限责任公司;雅砻江水电开发联合研究基金资助项目(50539060);国家自然科学基金资助项目(50479062)

摘　　要：针对某水电站泄洪洞出口挑坎水力特性和下游河道冲淤特性进行了试验研究。结合水力参数和下游河道冲淤变化规律的测试,探讨了泄洪洞挑坎原设计方案存在的主要问题。对不同挑坎位置和体型进行了对比试验,分析了各个方案的优缺点,最终提出了水流条件、冲淤特性均较优的椭圆型挑坎。研究成果可为实际工程设计提供试验依据。Experiments are carried out for the evolution of the hydraulic characteristics of the flow in the flip bucket and the scour downstream river. Measures are progressed for analyzing the feature of hydraulic characteristics and scour. Basic problems are evaluated with original design shape of flip bucket. Experimental data are obtained in different geometry of flip bucket and the general characteristics of the nappe and the scour are analyzed. On the base of experimental investigation, an optimum geometry is provided for the shape of flip bucket with the elliptic curve floor. These researches can be of help for the design in practical project and can be adopted by other projects.

关 键 词：泄洪洞 挑流水舌 挑坎优化 椭圆型挑坎 

分 类 号：TV72[水利工程—水利水电工程]