江苏大学学报（自然科学版）2012，Vol.33Issue(4)：402-407,6.DOI:10.3969/j.issn.1671-7775.2012.04.006
离心泵进口回流流场及其控制方法的数值模拟
Numerical simulation of recirculation control at centrifugal pump inlet
摘要
Abstract
During part-load operation, recirculation was inevitably developed at pump impeller inlet. Based on standard k - ε turbulent model, the 3-D steady turbulent flow in a centrifugal pump was simulated under different conditions to analyze the velocity distribution of the recirculation flow field and the vortex morphology. To solve recirculation, a control strategy of injecting high pressure water into impeller inlet was proposed. The control effects, the recirculation vortex morphology and the pump head and efficiency with different injection pressure were analyzed and compared through numerical simulation. The result indicates that high pressure water injection can effectively control inlet recirculation and improve the velocity distribution in inlet flow field with decreased recirculation vortex strength and recirculation onset critical flow rate, but also with decreased pump head and efficiency. Based on the experiment results, the optimum injection pressure in the proposed control stratgy is 0. 10 MPa.关键词
离心泵/进口回流/数值模拟/回流控制/叶轮Key words
centrifugal pump/inlet recirculation/numerical simulation/recirculation control/impeller分类
机械制造引用本文复制引用
张金凤,梁赟,袁建平,袁寿其..离心泵进口回流流场及其控制方法的数值模拟[J].江苏大学学报（自然科学版）,2012,33(4):402-407,6.基金项目
国家自然科学基金资助项目(51009072) （51009072）
江苏省自然科学基金资助项目(BK2009218,BK2010347) （BK2009218,BK2010347）
江苏大学人才启动基金资助项目(08JDG040) （08JDG040）
