Investigation of Self-Priming Process of a Centrifugal Pump with Double Blades  

作　　者：QIAN Heng MOU Jiegang REN Yun ZHU Zhibing LIU Nuojia ZHENG Shuihua WU Denghao 

机构地区：[1]College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China [2]College of Metrology&Measurement Engineering,China Jiliang University,Hangzhou 310018,China [3]Zhijiang College,Zhejiang University of Technology,Shaoxing 312030,China

出　　处：《Journal of Thermal Science》2021年第3期849-858,共10页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51609212,51606167,51779226 and 51976193)。

摘　　要：The gas-liquid two-phase flow patterns of a centrifugal pump during the self-priming process were investigated numerically and experimentally.The Euler-Euler multiphase model and SST k-ω turbulence model were applied for simulating the self-priming process.Meanwhile,the changes of motor speed and self-priming height were considered in the simulation.The overall transient two-phase flow features and water level distributions were mapped.Results showed that the self-priming process was divided into three stages.The liquid level in inlet-pipe rose in oscillation during self-priming process.The variations of water level during self-priming process of numerical simulation and test result agreed well.The inlet-pipe(Ver)was filled at 22 s and 24 s respectively numerically and experimentally.The bubble cloud circulated in the volute during middle stage of self-priming process,and breakup into smaller bubbles by shear force and tongue,and then discharged into chamber.The bubbles in the outlet-pipe mainly included bubbly flow and slug flow at the last stage of self-priming process,which is morphologically consistent with the test results.Also,during the self-priming process,the reflux liquid was pressed by blades and fully mixed with gas;that is the way to realizing the function of self-priming.

关 键 词：self-priming process gas-liquid two-phase flow centrifugal pump gas-liquid mixing and separation transient numerical simulation 

分 类 号：TH311[机械工程—机械制造及自动化]