水力发电学报2026，Vol.45Issue(2)：96-105,10.DOI:10.11660/slfdxb.20260208
抽蓄机组水轮机工况无叶区压力脉动特性与溯源研究
Study on pressure pulsation characteristics and tracing in vaneless section of pumped storage units under turbine mode
摘要
Abstract
Wide-load operation in the turbine mode is increasingly required for pump turbines in pumped storage plants,yet the pressure pulsations in the turbine intensify notably under small-opening,low-load conditions,posing a potential threat to unit safety and stability.Using the pulsation tracing network(PTN)method,this study examines a pump-turbine with a five-long and five-short blade runner,focusing on analysis of the pressure pulsation characteristics in its vaneless section under different heads,different guide vane openings,and different loads in the turbine mode.The results reveal complicated pressure pulsation components in the vaneless section,including typical frequencies such as 0.33fn,1fn,3fn,5fn,and 10fn(fn for one tenth of the blade passing frequency),and the ones of 10fn and 5 fn exert the most significant influence.The phase characteristic analysis further indicates the dominant frequency pulsations propagate upstream and downstream,affecting flow stability throughout the full passage.These findings provide valuable insights for optimizing pump-turbine runner design to enhance wide-load operational performance.关键词
压力脉动/水泵水轮机/水轮机工况/无叶区/压力脉动溯源网络方法Key words
pressure pulsation/pump turbine/power generation/vaneless section/pulsation tracking network分类
建筑与水利引用本文复制引用
王晨旭,广伟龙,肖若富,姚志峰,陶然,梁权伟,靳发业..抽蓄机组水轮机工况无叶区压力脉动特性与溯源研究[J].水力发电学报,2026,45(2):96-105,10.基金项目
国家自然科学基金(U24B20109 （）
52222904 （）
52309115) （）
