摘要
为了深入分析小流量工况下离心泵内非定常压力脉动特性,以一台比转速为90的离心泵为研究对象,对泵内非定常流动开展了数值计算,并获得了蜗壳内不同监测点的压力脉动数据。离心泵数值计算结果与试验数据的对比验证了数值计算结果的准确性。研究结果表明,小流量工况下泵内压力脉动特性更加显著,压力脉动的主频为叶片通过频率及其倍频。在小流量工况下压力脉动频域幅值最大,设计工况下压力脉动频域值明显衰减。0.1Q d工况下各监测点压力脉动频域幅值约为设计工况下的3.5—5.3倍。
In order to study the unsteady pressure fluctuations in a centrifugal pump under low low conditions,this paper takes a centrifugal pump with a specific speed of 90 as the object of study,carries out numerical calculations on the unsteady flow in the pump,and obtains the pressure fluctuations characteristics at different monitoring points in the volute.The comparison between the numerical calculation results and the experimental data of the centrifugal pump verifies the accuracy of the numerical calculation results.The research results show that the pressure fluctuations in the pump under low flow conditions are more significant,and the main frequency of the pressure fluctuations is the blade passing frequency and its multiplier frequency.The pressure fluctuation frequency domain amplitude is the largest under the small flow condition,and the pressure fluctuation frequency domain value decreases significantly under the design condition.The frequency domain amplitude of pressure fluctuation at each monitoring point under 0.1Q d flow rate is about 3.5-5.3 times of the design flow rate.
作者
郑路路
陈芳
陈小平
ZHENG Lulu;CHEN Fang;CHEN Xiaoping(School of Mechanical Engineering,Henan Institute of Technology,Xinxiang 453003,China;Henan Provincial Engineering Technology Research Center for Digital Design and Manufacturing of Electromechanical Equipment,Xinxiang 453003,China;Key Laboratory of Fluid Transmission Technology of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《河南工学院学报》
CAS
2023年第2期1-5,共5页
Journal of Henan Institute of Technology
基金
河南省科技攻关项目(232102241027)
河南省高等学校重点科研项目(23B460008)
河南工学院博士科研启动基金(KQ1861)。
关键词
离心泵
压力脉动
非定常流动
数值计算
centrifugal pump
pressure fluctuation
unsteady flow
numerical calculation
