排灌机械工程学报2011，Vol.29Issue(2)：99-103,5.DOI:10.3969/j.issn.1674-8530.2011.02.002
离心泵内部空化特性的CFD模拟
CFD simulation on cavitation characteristics in centrifugal pump
摘要
Abstract
The standard k-ε turbulence model, homogeneous muhiphase model and Rayleigh -Plesset equation were applied to simulate cavitation characteristics in a centrifugal pump with specific speed of 94 under different conditions based on ANSYS CFX software.According to the simulation results, the energy characteristics under the no-cavitation conditions and cavitation characteristics of the model pump were predicted, and the vapor volume distribution on the middle stream surface of impeller and the blade loading characteristics on the middle stream line under different cavitation conditions were analyzed.The comparison between prediction values and experimental values indicates that the prediction results are accurate to some extent, and the absolute errors of net positive suction head under different conditions are 0.25, 0.29 and 0.06 m, respectively.The flow field analysis indicates that the vapors generated at suction side of blade near the leading edge at first and then extended to the outlet of impeller with the reduction of inlet total pressure.Compared with other blades, the loading on the blade that against the volute tongue is the least and the loading on the other blades at the relative position of 0.35 -0.80 increased obviously with the deterioration of cavitation condition,which shows that the blade loading is significantly affected by cavitation.关键词
离心泵/空化特性/叶片载荷/计算流体动力学/流场Key words
centrifugal pump/ cavitation characteristics/ blade loading/ computational fluid dynamics/flow field分类
农业科技引用本文复制引用
王勇,刘厚林,袁寿其,谈明高,王凯..离心泵内部空化特性的CFD模拟[J].排灌机械工程学报,2011,29(2):99-103,5.基金项目
国家杰出青年科学基金资助项目(50825902) （50825902）
国家自然科学基金资助项目(51079602) （51079602）
