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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
Based on the analysis of three-dimensional viscous flow inside the rotor, this paper first analyzes the pressure distribution inside the original runner (HLD46) of the Gypsum Power Station, analyzes and calculates the vacancy Erosion occurs at the site and its strength and run-time run-time destruction of the situation is very consistent. On this basis, the main geometric parameters of the runner (blade inclination angle, blade angle and profile, etc.) are analyzed, and the cavitation erosion of the turbine airfoil is analyzed. Through multi-scheme design and multiple comparison and optimization of flow analysis, Gypsum power station cavitation erosion performance for the purpose of a new anti-cavitation runner. Optimized design of the new runner the lowest pressure is very close to the edge of the blade water, low pressure area greatly reduced, and basically did not change the original runner output performance, which access to manufacturers and Gypsophila approval. The new runner was put into operation at the end of 1999. No cavitation occurred on the No. 1 runner after more than 40,000 hours of operation, and the No. 2 runner showed slight cavitation only in a few leaves, indicating that the modified design was very unusual successful