如何确定挑流鼻坎合理宽度  

The Discussion of Reasonable Width About Flip Bucket

作　　者：周慧[1] 蒋兵[1] 

机构地区：[1]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《南水北调与水利科技》2009年第A02期1-2,12,共3页South-to-North Water Transfers and Water Science & Technology

摘　　要：挑流消能在消能工中有着广泛的应用，挑流原则要求获得最大的挑距和最小的冲坑。挑流鼻坎的几何尺寸对其起决定性作用，鼻坎挑角、反弧半径可根据规范选取，挑坎顶高程可根据下游最高水位确定，而挑坎宽度没有具体的要求，现通过假设计算法找出合理的鼻坎宽度，使得挑距最大，冲坑最小。最后还说明了入射水股面积对冲坑的影响。Flip energy dissipation is widely applied in the project of energy dissipation, to get the maximal jet trajectory length and the minimum scour hole is requested by the principle of flip flow. It is decided by the physical dimension of flip bucket, angle of flip bucket, radius of kick arc can be selected according the norms, and the top altitude of the flip bucket can be decided by the top water level in the lower reaches, but its width isn＇t specific request. In this paper, according to the supposititious design procedure, reasonable width of bucket can be found out. It makes the jet trajectory length maximal and the minimum scour hole. In the end, it simply explained the influence to the scour hole by the area of stream.

关 键 词：挑流鼻坎 挑流原则 挑距 鼻坎宽度 

分 类 号：TV697[水利工程—水利水电工程]