水利学报2025，Vol.56Issue(4)：433-444,12.DOI:10.13243/j.cnki.slxb.20240192
混流式水轮机抗泥沙磨损叶片的优化设计
Optimized design of erosion-reduced blades in a Francis turbine
摘要
Abstract
Erosive damage of Francis turbine operated along the sand-laden rivers is the key point in hydropower development.Sand and flow fluid are the main factors,and methods to improve the flow field are the main content.Adapting the angle along the blade leading edge and the installation angle is proposed based on the design theory of turbine blades to reshape the damage distribution.The results show that reasonable design for two angles can reduce blade damage,and ensure operating efficiency,but increase shroud damage.Under the combination of the angle along the blade leading edge θ*0=0.2 and the installation angle index x=3,the blade damage decreases by a maxi-mum of 71％.The reason is that due to angle adjustments,the vortex alters and the hitting location deviates,re-sulting in erosive wear in different regions.Finally,the design optimization of protecting the blades by sacrificing the shroud is more effective in reducing maintenance costs and increasing maintenance convenience.关键词
混流式水轮机/泥沙磨损/叶片进口偏转角/叶片安放角/叶道涡Key words
Francis turbine/erosive damage/angle along the blade leading edge/installation angle/interblade vortex分类
能源与动力引用本文复制引用
钱忠东,钟琴琴,曾心成,郭志伟..混流式水轮机抗泥沙磨损叶片的优化设计[J].水利学报,2025,56(4):433-444,12.基金项目
国家自然科学基金项目(52279090) （52279090）
