排灌机械工程学报Issue(4)：277-282,6.DOI:10.3969/j.issn.1674-8530.13.0022
入口非均匀流对轴流泵性能和压力脉动的影响
Effects of non-uniform suction flow on performance and pressure fluctuation in axial-flow pumps
摘要
Abstract
To study the effect of inflow conditions on an axial flow pump,two different types of non-u-niform inlet velocity distributions were established.By comparing with uniform inflow conditions,the effects of the non-uniform inflow conditions on pump performance,radial forces and pressure fluctua-tions were achieved by numerical simulations.Comparison of numerical simulation results and experi-mental values under uniform inflow verifies the accuracy of the numerical model.A comparative analy-sis of the effects on pump head,efficiency and radial force curves was performed under 0.7Q-1.2Q conditions.The variation of the axial flow pump performance and radial loads with the non-uniformity of the inlet velocity was obtained.Finally,based on the unsteady simulation,pressure fluctuations at impeller inlet,impeller outlet and guide vane exit at design condition were monitored,and the effects of two non-uniform inflows on pressure pulsations at three typical positions were achieved.The results show that by controlling the inflow situation,the hydrodynamic performance with non-uniform inflow is better than that with uniform inflow distribution.关键词
轴流泵/非均匀入流/压力脉动/数值模拟Key words
axial flow pump/non-uniform suction flow/pressure fluctuation/numerical simulation分类
农业科技引用本文复制引用
施卫东,张光建,张德胜,吴苏青,徐焰栋..入口非均匀流对轴流泵性能和压力脉动的影响[J].排灌机械工程学报,2014,(4):277-282,6.基金项目
国家自然科学基金资助项目（51109093）；江苏省自然科学基金资助项目 （）
