高坝施工导流洞改建为旋流竖井式泄洪洞的水力特性研究

为了研究旋流式竖井泄洪洞的水力特性,结合某水利枢纽施工导流洞改建为旋流竖井泄洪洞水工模型试验的部分研究成果,通过大量的优化试验研究,分析了竖井涡流消能工况的流态、压力分布、流速分布、消能率等水力特性.试验研究结果表明,这种旋流竖井式泄洪洞消能效率可达88%以上,涡室与竖井的水流流态比较平顺,压力分布合理.所得结论为旋流竖井泄洪洞的设计提供了依据,可为类似工程参考.

Study on the Hydraulic Characteristic for Constructing Diversion Tunnels of High Dam Transformed into Spillway Tunnels in a Type of Rotating Flow Shaft

In order to research the hydraulic characteristic of spillway tunnels in a type of rotating flow shaft,based on the hydraulic model test′s part research results of a certain hub construction diversion tunnel changed into a swirling shaft spillway tunnel,after a large number of optimized experimental studies,the hydraulic characteristics of the flow pattern of the shaft swirl energy dissipator,pressure distribution,velocity distribution and the rate of energy dissipation were analyzed.Experimental study shows that the energy dissipation efficiency of the swirl-type spillway tunnel shaft can be up to more than 88%.Vortex chamber with the shaft has a relatively smooth flow pattern,and the pressure distribution is reasonable.These provide the basis for the swirl shaft spillway tunnel design,and also can be a reference for similar projects.