水泵水轮机泵工况小流量区压力脉动预测  

Prediction of Pressure Fluctuations of Pump Turbine Under Off-Design Condition in Pump Mode

作　　者：尹俊连[1] 刘锦涛[1] 王乐勤[1] 魏显著 

机构地区：[1]浙江大学化工机械研究所,浙江杭州310027 [2]水力发电设备企业国家重点实验室,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2011年第7期1141-1144,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目资助(No.50979095)

摘　　要：为了研究水泵水轮机偏工况下的导叶内部的压力脉动特征,本文比较分析了非定常雷诺平均模拟方法URANS和脱体涡模拟方法DES两种方法预测压力脉动特征的可行性,结果表明,DES可以用来预测压力脉动特征,最后,重点对泵工况Q/QD=0.15工况点的压力脉动的时域和频域特征进行了分析,得到固定导叶和活动导叶内部的压力脉动主要是低频成分,为转轮通过频率的11.27%。此外,固定导叶内部的压力脉动没有受到转轮内部的影响,而活动导叶内部则含有转轮通过频率成分。In order to investigate the pressure fluctuation characteristics in the guide vanes and stay vanes of pump turbine under off-design conditions,unsteady renolds averaged Navier-Stokes simulation（URANS）detached eddy simulation（DES）were carried out.The results showed that the DES method can be used to capture the pressure fluctuation characteristics.And then,the pressure signals under the operating condition Q/Q_D=0.15 were analyzed in the time domain and frequency domain respectively.The results suggested that low frequency pressure fluctuations（f/9f_n=11.27%） are remarkable and the pressure signal in the stay vanes is not affected by the runner while that in guide vanes is influenced obviously.

关 键 词：水泵水轮机 压力脉动 DES 

分 类 号：TK730.2[交通运输工程—轮机工程]