导叶式离心泵瞬态空化流动及压力脉动分析  

Analysis of Transient Cavitation Flow and Pressure Pulsation of Guide Vane Centrifugal Pump

作　　者：王浩 李林伟 牟成琪 周佩剑 吴登昊 WANG Hao;LI Lin-wei;MOU Cheng-qi;ZHOU Pei-jian;WU Denghao(School of Metrology and Testing Engineering,China Jiliang University,Hangzhou,Zhejiang 310018,China;Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou,Zhejiang 310030,China;Institute of Process Equipment,Zhejiang University,Hangzhou,Zhejiang 310027,China)

机构地区：[1]中国计量大学计量测试工程学院,浙江杭州310018 [2]华电电力科学研究院有限公司,浙江杭州310030 [3]浙江大学过程装备研究所,浙江杭州310027

出　　处：《计量学报》2023年第6期931-938,共8页Acta Metrologica Sinica

基　　金：浙江省公益技术研究计划项目/工业(LGG21E090003);浙江省博士后科研项目择优资助(ZJ2021105);浙江省属高校基本科研业务费专项资金(2021YW72)。

摘　　要：采用RNG k-ε湍流模型和Zwart-Gerber-Belamri空化模型对导叶式离心泵进行数值模拟,得到内部压力脉动频谱曲线。结果表明:叶轮监测点压力脉动峰峰值沿流动方向逐渐降低,主频为8倍转频及其倍频;随着空化加剧,叶轮压力脉动峰峰值逐渐降低;正反导叶压力脉动主频均为叶频及其倍频,且幅值随空化发展而增加;空化在轴向上表现为自叶轮前盖板向后盖板空泡体积分数逐渐增加;叶轮与正导叶之间动静干涉使叶轮内流场产生周期性变化,造成压力脉动呈现周期性波动。The RNG k-εturbulence model and the Zwart-Gerber-Belamri cavitation model are used to numerically simulate a guide vane centrifugal pump,and the internal pressure pulsation spectrum curve is obtained.The results show that the pressure pulsation peak-to-peak value of the impeller monitoring point gradually decreases along the flow direction,and the main frequency is 8 times the rotation frequency and its multiplication frequency.With the intensification of cavitation,the peak-to-peak value of impeller pressure pulsation gradually decreases.The main frequencies of the pressure pulsation of the forward and reverse guide vanes are both the vane frequency and its multiplier,and the amplitude increases with the development of cavitation.The cavitation in the axial direction shows that the cavitation volume fraction gradually increases from the front cover plate to the rear cover plate of the impeller.The dynamic and static interference between the impeller and the positive guide vane causes periodic changes of the flow field in the impeller,resulting in periodic fluctuations in the pressure pulsation.

关 键 词：计量学 瞬态流动 空化 压力脉动 导叶式离心泵 数值模拟 

分 类 号：TB937[一般工业技术—计量学]