排灌机械工程学报2017，Vol.35Issue(12)：1024-1029,6.DOI:10.3969/j.issn.1674-8530.16.1025
双流道泵内瞬态动力学特性
Unsteady dynamics in double channel pumps
摘要
Abstract
In order to research the unsteady dynamics in double channel sewage pumps when it transports the solid-liquid two-phase flow,the inner flow double channel sewage pump was numerically simulated by using the mixture multiphase flow model and the developed standard k-ε turbulence model.The pressure fluctuation in the gap flow channel and the impeller radial force under different impeller diameter D2,namely 101,103 and 105 mm,were studied.The simulation results agree well with the experimental ones,which indicate that the numerical calculation methods can be used to predict the transient dynamics in this pump.The results show that the dominant frequency of pressure pulsation at monitoring points in gap flow channel is the blade passing frequency before and after adding a moderate amount of particles.The pressure fluctuation intensity at each monitoring point was weakened with particle addition and the maximum reduction was 25.86％.When the pump transports the solid-liquid two-phase flow and the diameter is 105 mm or 101 mm,the distribution and change of impeller radial force are more regular under designed and operation at a small flow rate.When the flow rate of two-phase flow is larger than the design flow rate,the distribution and change of impeller radial force are regular under all diameters.As the flow rate of two-phase flow increases,the vector center of impeller radial force moves from the eighth section to the fourth section of volute and the impeller diameter has little effect on it.关键词
双流道污水泵/固液两相流/压力脉动/径向力Key words
double channel sewage pump/solid-liquid two-phase flow/pressure pulsation/radial force分类
农业科技引用本文复制引用
谈明高,廉益超,吴贤芳,丁荣,陈昆..双流道泵内瞬态动力学特性[J].排灌机械工程学报,2017,35(12):1024-1029,6.基金项目
国家自然科学基金资助项目(51579117,51509109) （51579117,51509109）
江苏省自然科学基金资助项目(BK20161350) （BK20161350）
江苏高校优势学科建设工程资助项目 （）
江苏省重点研发计划项目(BE2015001-1) （BE2015001-1）
