基于SBES湍流模型的水泵水轮机泵工况驼峰特性研究  

Research on Hump Characteristics of Pump-Turbine in Pump Mode Based on SBES Turbulence Model

作　　者：张振洲 孟祥瑞 安东森 ZHANG Zhenzhou;MENG Xiangrui;AN Dongsen(Construction Management and Quality Safety Center,Ministry of Water Resources,Beijing 100038,China;State Grid Xinyuan Anhui Ningguo Pumped Storage Co.,Ltd.,Ningguo 242300,China;Beijing Aerospace Propulsion Institute,Beijing 100076,China)

机构地区：[1]水利部建设管理与质量安全中心,北京100038 [2]国网新源安徽宁国抽水蓄能有限公司,安徽宁国242300 [3]北京航天动力研究所,北京100076

出　　处：《中国水能及电气化》2025年第3期1-11,24,共12页China Water Power & Electrification

摘　　要：水泵水轮机泵工况驼峰特性是一种典型的不稳定流动,严重影响机组运行的可靠性。为深入探究驼峰特性,研究采用SBES湍流模型进行仿真计算,有效捕捉到了不同导叶开度下泵工况的驼峰区。结果表明,不同导叶开度下驼峰区出现的流量工况显著不同,随着导叶开度增大驼峰区有向大流量偏移的趋势。分析各静止部件扬程损失发现,小流量工况驼峰区运行时活动导叶损失占比显著提高,且随着流量减小而增加。进一步对其流态分析发现,在驼峰区工况活动导叶吸力面产生了严重流动分离现象,衍生出大量涡旋流动,并且随着开度减小漩涡流动增多,这导致其水力损失的增加。而在大流量工况时,不稳定流动现象明显得到缓解。本研究对水泵水轮机的设计优化具有一定的借鉴意义。The hump characteristics of pump-turbines in the pump mode have long been a focus of attention due to their typical unsteady flow nature,which significantly affects the reliability of unit operation.To explore the hump characteristics in depth,the SBES turbulence model was employed for simulation,effectively capturing the hump region under different guide vane openings in pump mode.The results show that the flow conditions at which the hump region occurs vary significantly with different guide vane openings,with the hump region shifting toward higher flow rates as the guide vane opening increases.Analysis of the head loss across stationary components reveals that,during hump region operation at low flow rates,the loss proportion of the stay vane increases significantly and continues to grow as the flow rate decreases.Further flow field analysis indicates that severe flow separation occurs on the suction side of the stay vane in the hump region,generating numerous vortices.As the guide vane opening decreases,vortex flow becomes more pronounced,leading to increased hydraulic losses.Conversely,at high flow rates,unsteady flow phenomena are significantly alleviated.This study provides valuable insights for the design and optimization of pump-turbines.

关 键 词：水泵水轮机 数值模拟 驼峰 流动分离 

分 类 号：TH311[机械工程—机械制造及自动化]