Experimental study on effects of air injection on cavitation pressure pulsation and vibration in a centrifugal pump with inducer  

作　　者：Yan-hong Mao Hou-lin Liu Yong Wang Jie Chen Fei Liu 

机构地区：[1]Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang,212013,China [2]Suzhou Vocational Institute of Industrial Technology,Suzhou,215104,China

出　　处：《Journal of Hydrodynamics》2023年第6期1168-1178,共11页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51979126).

摘　　要：Cavitation commonly induces performance deterioration and system vibration in many engineering applications.This paper aims to investigate the effects of air injection on cavitation evolution,pressure pulsation and vibration in a centrifugal pump with inducer.In this paper,the high-speed camera is used to capture the gas flow pattern and cavitation evolution process in the inducer.The impacts of air injection on the inlet pressure pulsation and vibration are also investigated.The results show that the cavitation development in the inducer undergoes four patterns:incipient cavitation,sheet cavitation,cloud cavitation and super cavitation.During the development of cavitation,the main frequency of the pressure pulsation shifts to lower frequencies,and the amplitude of the vibration increases.In addition,air injection promotes the incipient cavitation but delays the cavitation development.A small amount of air can effectively decrease amplitudes of pressure pulsation and vibration.But as the air content increases,the fluctuations and amplitudes of pressure pulsation and vibration increase.

关 键 词：Air injection cavitation control INDUCER VIBRATION pressure pulsation 

分 类 号：O35[理学—流体力学]