【摘要】 本文从改善满天星电站转轮严重空蚀破坏出发 ,以转轮内部三维粘性流动分析为基础 ,首先分析了满天星电站原转轮 (HLD46)内部的压力分布规律 ,分析计算显示的空蚀发生部位及其强度与转轮实际运行中的破坏情况非常吻合。在此基础上 ,分析了转轮主要的几何参数 (叶片倾角、叶片包角及型线等 )对水轮机翼型空蚀的影响 ,通过多方案的设计和流动分析的多次比较优化 ,获得改善满天星电站空蚀性能为目的的新型抗空蚀转轮。优化设计后的新型转轮压力最低部位非常靠近叶片出水边 ,低压区面积大大减少 ,并且基本上没有改变原转轮的出力性能 ,从而获得制造厂和满天星电站的认可。新转轮于 1 999年底投入运行 ,经过40 0 0多小时运行后 1 #转轮没有发生空蚀现象 ,2 #转轮仅在几个叶片发现有轻微空蚀 ,表明改型优化设计是非常成功的更多还原

【Abstract】 The paper presents how to solve the caviation problem of Mantingxing Hydropower Station.Firstly,the cavitation position and area in the former runner is determined by 3 D flow field simulation based on CFD,and is found to match exactly with observed erosion area on damaged runner;Then the influence of main geometry parameters(such as blade lean,blade outlet angle and closing angle)on runner’s cavitation property is examined in detail.Based on above analysis,A new runner with uniform pressure distribution and small low pressure area is optimized,which gets higher efficiency and better anit cavitation properties but keeps output unchanged.The two new designed runners(with same size and shape)were assembled in Mantingxing Hydropower Station(unit No.1 and No.2) in December 1999,after 4000 hours running,no cavitation appears in No.1,3 blades in No.2 appears very small cavitation area.hentheinfluenceofmainge更多还原