【作者】 汪凯迪； 张建民；

【Author】 WANG Kai-di;ZHANG Jian-min;Sichuan University,State Key Laboratory of Hydraulics and Mountain River Engineering;

【机构】 四川大学水力学与山区河流开发保护国家重点实验室；

【摘要】 某中水头水利工程,消能方式为宽尾墩结合消力池底流消能,在大中流量时,水跃可以稳定在消力池内,水流流态较好,但在小流量时,在消力池内难以形成稳定水跃,水流流态较差,对下游冲刷严重。本研究在某已运行工程基础上,提出在消力池末端增设尾坎辅助消能的想法,分别采用物理模型试验与数值模拟方法进行对比研究,分析得出在小流量时,于明渠消力池末端增设8m高尾坎消能工消能效果明显,较好地减少对明渠底板及下游冲刷。可为类似工程提供一定借鉴意义。更多还原

【Abstract】 A mid-head water engineer uses the flaring gate piers and stilling basin to dissipate water energy.The hydraulic jump could be stable in the basin under mass and middle discharge,but for low discharge,it is hard to keep the water jump stable,besides,it would lead to bad flow and serious scour downstream.On the basis of a running project,this paper puts forward the idea of adding an auxiliary energy dissipater to the end of the stilling basin.The physical model test and the numerical simulation method are used for comparative study.The analysis shows that in the case of low flow,the dissipation capacity of the open channel is small.The addition of an 8 m high tailing energy dissipater at the end of the basin has a significant energy dissipation effect,which effectively reduces the flushing of the bottom of the open channel and the downstream.This paper can provide some reference for low-Froude flow dissipation in similar projects.更多还原