水力发电学报2025，Vol.44Issue(12)：65-73,9.DOI:10.11660/slfdxb.20251206
水泵水轮机转轮叶片高压边形状对性能的影响
Influence of high pressure edge blade shape on performance of pump-turbine runners
摘要
Abstract
To improve the operational stability of pump-turbines for wide-load conditions,the influence of the runner blade angle at the high-pressure edges on performance is examined.A detailed analysis of flow characteristics and vortex structures at three blade angles(zero,positive,and negative inclination)for both optimal and low-flow conditions is conducted.Results show that at the optimal operating point,three blades at different angles all feature insignificant differences in performance,while flow instability develops for low-flow conditions because the increased positive incidence angle at the runner inlet leads to severe flow separation on the blades'suction sides.Additionally,certain axial vortex structures in the runner passage induce backflow,while the negative inclination angle effectively reduces vortex intensity and suppresses backflow,increasing the spacing between dual axial vortices,mitigating vortex interaction,and thereby reducing energy dissipation.Furthermore,low-frequency components of the vortex structure are weakened significantly,contributing to pressure pulsation suppression to a certain extent.Compared to zero and positive inclination angles,the negative angle helps broaden the operational range of pump-turbines in the turbine mode and enhances operational stability.关键词
水泵水轮机/宽负荷运行/叶片倾角/转轮涡结构/熵产/压力脉动Key words
pump turbine/wide-load operation/blade inclination angle/runner vortex/entropy production/pressure fluctuation分类
能源科技引用本文复制引用
LI Yunzhe,FENG Jianjun,JIA Guozhang,ZHANG Huan,LUO Xingqi..水泵水轮机转轮叶片高压边形状对性能的影响[J].水力发电学报,2025,44(12):65-73,9.基金项目
国家自然科学基金重点项目(52439006) （52439006）
陕西省自然科学基础研究计划重点项目(2025JC-QYXQ-023) （2025JC-QYXQ-023）
