叶片数对超低比转速斜流式水轮机的影响  

Influence of Blade Number on Inclined Flow Turbine with Ultra-low Specific Speed

作　　者：陈晓宇 吴迎新 冯珂 CHEN Xiaoyu;WU Yingxin;FENG Ke(North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Anhui Jinzhai Pumped Energy Storage Co.,Ltd.,Jinzhai 237300,China)

机构地区：[1]华北水利水电大学,河南郑州450045 [2]安徽金寨抽水蓄能有限公司,安徽金寨237300

出　　处：《中国水能及电气化》2021年第4期33-37,共5页China Water Power & Electrification

摘　　要：叶片数是影响超低比转速斜流式水轮机水力性能的因素之一。文章利用Fluent 16.0软件,研究分析了不同叶片数模型在不同流量工况下,外特性曲线以及内部流场分布图。结果表明:不同叶片数时,流量从最高效率点向小流量变化时效率下降的速度要比从最高效率点向大流量变化时的快。对于具体参数组合的超低比转速斜流式水轮机,存在最优的叶片数使得其水力性能最优。The number of blades is one of the factors affecting the hydraulic performance of inclined flow turbines with ultra-low specific speed.Fluent 16.0 software is used to study and analyze the external characteristic curves and internal flow field distribution diagrams of different blade number models under different flow conditions in the paper.The results show that the efficiency decreases faster when the flow rate changes from the highest efficiency point to the low flow rate than that when the flow rate changes from the highest efficiency point to the large flow rate with different blade numbers.There is an optimal number of blades to optimize the hydraulic performance aiming at the ultra-low specific speed inclined flow turbine with specific parameter combinations.

关 键 词：叶片数 水轮机 水力损失 

分 类 号：TV734.1[水利工程—水利水电工程]