威远江水电站溢洪道挑流鼻坎数值模拟优化研究

Simulating and Optimizing Flip Bucket of Spillway of Weiyuan River Hydropower Station

针对威远江水电站岸边式溢洪道挑流消能存在的问题，采用RNGκ～ε双方程模型模拟湍流，利用流体体积分数法（VOF）确定自由水面线，采用非结构网格与自适应局部网格加密的方法，成功地对溢洪道挑流鼻坎挑流进行了三维紊流数值模拟，并利用数值模拟方法对挑流鼻坎的修改方案进行了研究，并经过计算提出了较优方案，并经试验验证得到较好的效果，为威远江水电站设计与优化提供了可靠的设计依据．

The RNG κ～ε two equations model is adopted to simulate turbulence; and the volume of fluid method is used to determine the free water surface line; and the unstructured grid and adaptive grid densify local area mesh method, is used to build up successfully three-dimensional numerical simulation model of the spillway flip bucket turbulent flow, and use this model to research the modified scheme of the flip bucket. At last, an optimizing scheme is proposed through calculation and analysis and it is proved by the model test that can get better result, so as to provide a reliable basis for the design and optimization of Weiyuan River Hydropower Station.