基于数值模拟改进的水泵水轮机S特性曲线  

Improved S-shaped characteristic curve of pump-turbine based on numerical simulation

作　　者：胡金弘 杨建东[1] 何相慧 杨桀彬[1] HU Jinhong;YANG Jiandong;HE Xianghui;YANG Jiebin(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水资源与水电工程国家重点实验室,湖北武汉430072

出　　处：《华中科技大学学报（自然科学版）》2020年第11期109-114,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51839008)。

摘　　要：为改进水泵水轮机S特性曲线,开展了水泵水轮机设计及数值模拟研究.首先,设计了多个等长叶片转轮,以研究叶片安放角对水轮机工况效率和S特性曲线的影响;然后,选取一高效率等长叶片转轮,并应用长短叶片设计,以研究其对S特性曲线的影响.结果表明:选取较小的叶片安放角可增加水轮机工况的效率,但S特性更加突出;而应用长短叶片设计虽然会导致设计工况下的水力效率有所下降,但是S特性得到明显改进.Hydraulic design and numerical simulation study were conducted to improve the S-shaped characteristic curve of a pump-turbine.First,a list of runners with equal-length blades was designed to investigate the effect of blade angles on the operating efficiency and S-shaped characteristic curve of a pump-turbine.Then,a high-efficiency runner with equal-length blades was selected and applied with splitter blade design to study the influence of splitter blade design on the S-shaped characteristic curve.Results show that a smaller blade angle can improve hydraulic efficiency in turbine mode,but will make the S-shaped characteristic more prominent.Although the application of splitter blade design results in a decrease in hydraulic efficiency under design conditions,the S-shaped characteristic can be significantly improved.

关 键 词：抽水蓄能电站 水泵水轮机 S特性曲线 数值模拟 长短叶片转轮 

分 类 号：TV734.1[水利工程—水利水电工程] TV743