离心泵导叶流道进口处压力脉动研究  

Investigation on Pressure Pulsation at the Inlet of Guide Vane in a Centrifugal Pump

作　　者：周强[1] 李宏坤[1] 仲作文 雍兴平[2] 么立新[2] ZHOU Qiang;LI Hong-Kun;ZHONG Zuo-Wen;YONG Xing-Ping;YAO Li-Xin(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China;Shenyang Blower Works Group Nuclear Pump Co.,Ltd,Shenyang 110869,China)

机构地区：[1]大连理工大学机械工程学院,大连116024 [2]沈阳鼓风机集团核电泵业有限公司,沈阳110869

出　　处：《工程热物理学报》2020年第7期1679-1684,共6页Journal of Engineering Thermophysics

基　　金：国家科技支撑计划资助(No.2015BAA08B03);辽宁省科技重大专项计划项目(No.2019JH1/10100019)。

摘　　要：为研究离心泵导叶流道进口处压力脉动的分布及传播规律,深入探究导叶式离心泵内动静干涉作用机理。试验采集某核级离心泵相邻两个导叶流道进口处压力脉动信号,并对其进行分析。结果表明:模态节径模式分析方法可以用来分析预测压力脉动主要特征频率成分,导叶流道进口处压力脉动主要为叶片通过频率及其倍频,并以此形式沿叶轮旋转方向向下传播。相同导叶流道进口处流体流动具有不均匀性,各测点压力脉动主要特征频率及最大幅值对应频率不同。压力脉动在叶片通过频率及其倍频处相关性强,随着流量增大至设计工况,压力脉动能量逐渐集中到叶片通过频率及其倍频处。研究可为降低泵内压力脉动提供一定参考。In order to investigate the distribution and propagation of pressure pulsation at the inlet of the guide vane in a centrifugal pump and to further explore the Rotor-Stator Interaction(RSI)mechanism.The pressure pulsation signals at the inlet of two adjacent guide vanes in a nuclear grade centrifugal pump were obtained by experiment and analyzed.The results show that the diameter mode analysis method can be applied to predict the dominant components.The main frequency component is the blade passage frequency and its harmonics.The pressure pulsation transmits downward in these form along the direction of the impeller rotation.The flow at the inlet of guide vane is not uniform circumferentially as the characteristic frequency components and the maximum amplitude frequency differ at different points in the same guide vane flow channel.The pressure pulsation is highly correlated at the blade passage frequency and its harmonics.As the flow rate increases until the design condition,the energy gradually concentrates to the blade passage frequency and its harmonics.These results can provide some meaningful reference to decrease pressure pulsations in the nuclear grade centrifugal pump.

关 键 词：导叶式离心泵 导叶进口 压力脉动 动静干涉 

分 类 号：TH311[机械工程—机械制造及自动化]