Abstract: There were some safety problems existed in the water inlet of Dongping Hydropower Station, including severe turbulent flow and suction vortex. 3D numerical simulation and hydraulic model tests were used to analyze and compare different solution schemes. The final decision was to shorten the length of diverting wall and reduce the height of sediment control sill. After implementation of the measures, the inlet flow regime, the stability and efficiency of the turbines have been significantly improved to desired results. It has a good reference for similar hydropower stations.

Key words: Dongping hydropower station, water inlet, flow regime, diverting wall, sediment control sill

摘要： 针对东坪水电站厂房进水口存在的严重水流紊乱、吸入式漩涡等影响机组运行出力和安全的问题，采用三维数值模拟、水工模型试验等手段进行多方案对比研究，选择了缩短导墙长度、降低拦沙坎高度等方案，并实施水下切割。项目实施后厂房进水口流态得到明显改善，机组稳定性、效率得到明显提升，达到了预期效果。对类似电站导墙等建筑物的布置具有良好的借鉴作用，实施方式具有较强的现实意义。

关键词: 东坪水电站, 厂房进水口, 流态, 导墙, 拦沙坎