水力发电学报2024，Vol.43Issue(12)：89-97,9.DOI:10.11660/slfdxb.20241209
C型叶片转轮水泵水轮机驼峰区流动特性分析
Analysis of flow characteristics in hump regions of pump turbine with C-type runner blades
摘要
Abstract
This study conducts numerical simulations and experimental tests of a model pump turbine to explore the improvement and influence of an optimized runner blade profile on the flows in a reversible pump turbine working in the hump region.A simulation analysis on its performance is made for the optimized C-type profile.Based on the vortex identification method,we discuss the flow and vortex distributions in each section of its flow passage in the hump region before and after runner modification,and reveal the influence of the new profile on the flows in the hump region.We find that after optimization,the hump range and hump margin of the pump turbine are smaller,and the trend of its head variations with flow rate is milder.And,the vortex zones become smaller in its draft tube,guide vane section,and runner section under a large flow rate.Compared with the model before optimization,the backflow is significantly reduced,and only a small amount of backflow comes from the rotating runner at the draft tube outlet under the hump region conditions.The zones of flow separation in the guide vane and runner sections are reduced,and the vortices in the vaneless region are significantly reduced,indicating the runner blade profile optimization helps improve the hump characteristics and internal flow characteristics of the pump.关键词
可逆式水泵水轮机/转轮优化设计/驼峰特性/涡识别法/流动特性Key words
reversible pump turbine/optimization design of runner/hump characteristics/vortex identification method/flow characteristic分类
能源与动力引用本文复制引用
肖业祥,肖微,任绍成,桂中华,林昊..C型叶片转轮水泵水轮机驼峰区流动特性分析[J].水力发电学报,2024,43(12):89-97,9.基金项目
国家电网有限公司总部管理科技项目资助(5419-202243054A-1-1-ZN) （5419-202243054A-1-1-ZN）
