排灌机械工程学报
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排灌机械工程学报  2013, Vol. 31 Issue (5): 401-405    DOI: 10.3969/j.issn.1674-8530.2013.05.007
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水泵水轮机“S”形区全流道数值模拟
李仁年, 刘殿兴, 董志强, 魏显著
(1.兰州理工大学能源与动力工程学院, 甘肃 兰州 730050; 2.水力发电设备企业国家重点实验室水轮机研究室, 黑龙江 哈尔滨 150040)
Numerical analysis of flow in pumpturbine operating in Sshape region
(1. College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China; 2. Turbine Laboratory,State Key Laboratory of Hydropower Equipment, Harbin,Heilongjiang 150040, China)
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摘要 为了解决水泵水轮机“S”形区所导致的水泵水轮机在水轮机工况并网困难问题,研究了水泵水轮机“S”特性工作区域的内部流动情况,选取国内某抽水蓄能电站模型水泵水轮机水力模型作为研究对象,进行几何建模,并借助计算流体动力学软件CFX进行全流道数值模拟.模拟采用了区别于传统RANS模型更为精细的分离涡模型进行计算,得到了水泵水轮机内部的流动状态以及外特性参数,并同模型试验值、理论分析结果进行对比验证.结果表明:分离涡模型的计算结果可以达到很好的精度,转轮流道内的流场与理论分析结果相吻合,外特性与试验值相吻合,仿真计算误差小于3%;随着流量不断减小,转轮进口流动分离现象逐渐增大,最终发展成旋涡对流道造成堵塞,堵塞还将引发转轮与双列叶栅之间的相互作用,导致整个流道流动不稳定性的产生.
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李仁年
刘殿兴
董志强
魏显著
关键词水泵水轮机   &ldquo   S&rdquo   形区   数值模拟   分离涡模型   流动特性     
Abstract: In order to study the characteristics of internal flow in a pumpturbine operating in the Sshape region, the flow in the model pumpturbine in a pumped storage power station in China was simulated 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.
Key wordspump turbine   Sshaped region   numerical simulation   DES model   flow characteristics   
收稿日期: 2012-09-18; 出版日期: 2013-05-31
基金资助:

“十二五”国家科技支撑计划项目(2011BAF03B01); 黑龙江省杰出青年科学基金资助项目(JC201115)

通讯作者: 刘殿兴(1986—),男,黑龙江双城人,硕士研究生(liu20022005@163.com),主要从事流体机械内部流动理论与稳定性研究.   
作者简介: 李仁年(1963—),男,甘肃民勒人,教授,博士生导师(lirn@lut.cn),主要从事水力机械流动机理研究.
引用本文:   
李仁年,刘殿兴,董志强等. 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.
LI Ren-Nian,LIU Dian-Xing,DONG Zhi-Qiang et al. Numerical analysis of flow in pumpturbine operating in Sshape region[J]. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(5): 401-405.
 
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