三道湾水电站正常溢洪洞及泄洪排

试验表明，三道湾水电站原设计存在以下问题：泄洪排沙洞单独全开运行工况下，其进口上方存在贯通性吸气漏斗漩涡；正常溢洪洞进口侧收缩十分严重，泄流量不足，闸后存在水翅、折冲波等不良流态，下游消能效果不佳；针对实际情况，试验通过在泄洪排沙洞进口增设消涡格栅，在正常溢洪洞进口设置椭圆形导墙、延长闸后收缩段，下游采用扩散挑流消能等措施，很好地解决了上述问题。

Experimental Study on Normal Spillway and Flood-Release & Sediment Sluice in Sandaowan Hydropower Station

Experiments show that there are following problems exist in the original design of the Sandaowan Hydropower Station: Transfixion funnel vortex happens at the inlet of the flood release sediment sluice;side contraction is serious at the inlet of normal spillway,and discharge is insufficient;water wing and refraction exist behind sluice,so the energy dissipation effect is not desirable.Aiming at the actual conditions,the problems are solved by adding vortex-elimination grid at the inlet of the flood-release and sediment sluice,installing ellipse diversion wall at the inlet of normal spillway,prolonging contraction reach behind sluice;and adopting diffusive trajectory energy dissipation downstream.