排灌机械工程学报2013，Vol.31Issue(5)：401-405,5.DOI:10.3969/j.issn.1674-8530.2013.05.007
水泵水轮机“S”形区全流道数值模拟
Numerical analysis of flow in pump-turbine operating in S-shape region
摘要
Abstract
In order to study the characteristics of internal flow in a pump-turbine operating in the Sshape region,the flow in the model pump-turbine in a pumped storage power station in China was simulated by using CFD code-CFX.The detached eddy simulation model (DES) that is more precise than the traditional RANS model was applied in the simulation,consequently,the internal flow pattern and performance parameters of the pump-turbine were obtained; and compared with the experimental data and the theoretical analysis results,respectively.It was shown that the results of DES model are quite good,causing the error between the estimated and experimental performance is less than 3％; further,the internal flow in the runner are in good agreement with theoretical analysis as well.As the flow rate decreases,the flow separation phenomenon near the runner inlet was strengthened gradually,and eventually a vortex was developed in the flow passages,causing a blockage to flow.Note that the vortex can induce rotor-stator interactions among the runner and double circular cascade,which will results in instability of flow in the whole passage.关键词
水泵水轮机/"S"形区/数值模拟/分离涡模型/流动特性Key words
pump turbine / S-shaped region / numerical simulation / DES model / flow characteristics分类
农业科技引用本文复制引用
李仁年,刘殿兴,董志强,魏显著..水泵水轮机“S”形区全流道数值模拟[J].排灌机械工程学报,2013,31(5):401-405,5.基金项目
"十二五"国家科技支撑计划项目(2011BAF03B01) （2011BAF03B01）
黑龙江省杰出青年科学基金资助项目(JC201115) （JC201115）
