华中科技大学学报（自然科学版）2017，Vol.45Issue(9)：64-68,5.DOI:10.13245/j.hust.170912
泵反转液力透平速度滑移的计算与分析
Calculation and analysis on velocity slip of pump as turbine
摘要
Abstract
Focus on the pump as turbine (PAT),the slip phenomenon was analyzed based on RNG (renormalization group)k-εsimulation,the distribution of slip factor was revealed for pump mode and turbine mode,and a new method of head relationship between pump and turbine mode was proposed considering slip factor.Results show that slip factor is increasing with the increase of discharge in pump mode but inversely in turbine operation.Relevant hydraulic loss in impeller passage is induced by slip phenomenon.Slip strengthened in part-load region,as a consequence,hydraulic efficiency is low,on the contrary,it weakened in over-load region,therefore,hydraulic efficiency of PAT is high relatively.Then the head relationship between pump mode and turbine mode for 6 selected PATs were calculated based on the proposed new method,and results were compared with those without consid-ering the slip coefficient,which shows that the average error is reduced by 5％～20％ using proposed new method.关键词
离心泵/液力透平/速度滑移/滑移系数/换算关系Key words
centrifugal pump/pump as turbine (PAT)/velocity slip/slip factor/head relationship分类
机械制造引用本文复制引用
王晓晖,杨军虎,夏正廷,郭艳磊..泵反转液力透平速度滑移的计算与分析[J].华中科技大学学报（自然科学版）,2017,45(9):64-68,5.基金项目
国家自然科学基金资助项目 (51569013). （51569013）
