江苏大学学报（自然科学版）2012，Vol.33Issue(4)：408-413,6.DOI:10.3969/j.issn.1671-7775.2012.04.007
离心泵内部非定常空化流动特征的数值分析
Numerical analysis of unsteady cavitating flow characteristic in centrifugal pump
摘要
Abstract
Based on full cavitation model and mixed two-phase flow model, the steady and unsteady cavitating flow-passages in centrifugal pump with specific speed of 130 were numerically simulated. The region and the degree of cavitation in the centrifugal pump flow-passage were predicted. The characteristics of pressure fluctuation was achieved by monitoring the pressure fields around the volute tongue. The simulation results indicate that the cavitation generates at the suction side of blades near leading edge. The region of vapor extends and the volume fraction of vapor increases with the decreasing of total inlet pressure. The vapor appears on the pressure side of blades when the cavitation is deteriorated. The cavitation degree on each blade changes periodically with the change of relative position between impeller and volute. The frequency of pressure fluctuation shows obvious discrete characteristic with high blade passing frequency amplitude. With the development of cavitation degree, the pressure fluctuation amplitude induced by cavitating flow in flow-passage is increased with a corresponding relationship.关键词
离心泵/空化/非定常空化流动/压力脉动/频域分析Key words
centrifugal pump/cavitation/unsteady cavitating flow/pressure fluctuation /frequency-domain analysis分类
机械制造引用本文复制引用
杨敏官,孙鑫恺,高波,邵腾..离心泵内部非定常空化流动特征的数值分析[J].江苏大学学报（自然科学版）,2012,33(4):408-413,6.基金项目
国家自然科学基金资助项目(50776040) （50776040）
江苏高校优势学科建设工程项目 （）
江苏省高校自然科学研究项目(11KJB470003) （11KJB470003）
