导叶翼型优化对水泵水轮机“S”特性的影响  

Effect of guide wane airfoil optimization on the S characteristics of pump turbines

作　　者：李琪飞[1,2] 黄腾 郑非 辛路 谢耕达 LI Qifei;HUANG Teng;ZHENG Fei;XIN Lu;XIE Gengda(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Fluid Machinery and Systems of Gansu Province,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]甘肃省流体机械及系统重点实验室,甘肃兰州730050

出　　处：《哈尔滨工程大学学报》2023年第8期1354-1360,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52066011);西华大学教育部重点实验室开放课题(szjj2019-025).

摘　　要：为了改善水泵水轮机“S”特性,本文以某水泵水轮机模型机为研究对象,采用SST k-ω湍流模型开展水泵水轮机全流道三维数值计算。通过优化活动导叶翼型,得出n 11-Q 11模拟曲线和机组“S”特性改善情况,并对优化活动导叶翼型后的机组的无叶区进行了压力脉动分析。结果表明:优化活动导叶翼型对机组的“S”特性存在一定改善效果;翼型优化后机组的效率虽然有小幅度下降,但是整体效率依然保持在90%以上;无叶区压力脉动主要是由活动导叶区域出流,转轮叶片工作面发生冲击导致的分流以及转轮叶片与活动导叶组成的动静叶栅干涉效应引起的。改型后的活动导叶降低了无叶区的压力脉动幅值,在一定程度上提升了水泵水轮机的安全系数。In this study,a pump turbine model was taken as the research object,and the SST k-ωturbulence model was used to conduct the three-dimensional numerical calculation of the entire channel of a pump turbine to improve the S characteristics of pump turbines.The n 11-Q 11 simulation curve was obtained,and the S characteristics of the unit were improved by optimizing the airfoil of the movable guide vane,and pressure pulsation analysis was performed on the vaneless zone of the unit after the airfoil of the movable guide vane was optimized.Results showed that the optimized movable guide vane airfoil improved the S characteristics of the unit.Although the efficiency of the unit was slightly reduced after airfoil optimization,the overall efficiency of the unit remained above 90%.Pressure pulsation in the vaneless zone was mainly caused by the divergence of the flow from the movable guide vane area and the working surface of the runner blade due to impact as well as interference between the runner vane and the active guide vane cascades composed of dynamic and static vane cascades.The modified movable guide vane reduced the amplitude of pressure pulsation in the vaneless zone.This effect improved the safety factor of the pump turbine to a certain extent.

关 键 词：水泵水轮机 “S”特性曲线 活动导叶 翼型设计 数值计算 动静叶栅干涉 安全系数 

分 类 号：TK734[交通运输工程—轮机工程]