深尾水河床式电站宽尾墩体型优化试验研究

Optimal experimental study on flaring gate pier shape of river bed hydropower station with deep tail water

该文采用模型试验重点针对具有深尾水、低水头和大单宽流量的泄洪闸体型进行了研究。以某在建河床式水电站为研究对象,基于该水电站实际运行方式,以出闸水流衔接流态、消力池流态、出池流速和下游冲刷作为控制指标,分别比较了Y型宽尾墩、常规宽尾墩及常规宽尾墩+底部贴角等泄洪闸体型,最终确定常规宽尾墩+底部贴角方案相对较优。该方案通过采用底部贴角减小了宽尾墩下部过流面积,继而增大了泄洪表孔出口水深,使水体在消力池内的波动和流速都相对减小,消能率相对提高,进而满足工程泄洪消能要求。

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