排灌机械工程学报2016，Vol.34Issue(5)：369-374,6.DOI:10.3969/j.issn.1674-8530.15.0122
气液两相条件下离心泵内部流态及受力分析
Unsteady internal flow and thrust analysis of centrifugal pump under gas-liquid two-phase flow conditions
摘要
Abstract
In order to study internal flow patterns and thrust on an impeller under gas-liquid two-phase flow conditions,a centrifugal pump with a specific speed of 129 is selected,and the unsteady three-di-mensional flow in the pump is simulated by applying the Eulerian-Eulerian inhomogeneous multiphase flow model based on ANSYS CFX software.The variations of a few fluid flow variables such as pressure loading on blades,and gas volume fraction distribution are obtained under different gas volume frac-tions admitted at the pump inlet,the predicted head and efficiency are compared with the measured data.The results show that the gas phase is mainly accumulated on the blade suction surface and in the middle part of flow passage at the impeller outlet,further the gas volume fraction on the shroud are higher than that on the hub.With the increasing gas volume fraction at the pump inlet the flow distor-tion in the impeller passages becomes severe,hence the flow inhomogeneity between the gas phase and the liquid phase is intensified,and the vortex area is enlarged.From the inlet to the outlet of impeller, the pressure loading on the blade pressure surface reduces faster than that on the blade suction surface, but the loading on the suction surface declines quicker near the impeller outlet.The imbalance of the radial thrust on the impeller gets worse,and the torque acted on it decreases.关键词
离心泵/气液两相流/瞬态数值模拟/流态分析Key words
centrifugal pump/gas-liquid two-phase flow/transient numerical simulation/flow status analysis分类
农业科技引用本文复制引用
李贵东,王洋,郑意,马小虎,梁龙一,胡日新..气液两相条件下离心泵内部流态及受力分析[J].排灌机械工程学报,2016,34(5):369-374,6.基金项目
江苏高校优势学科建设工程项目 （）
江苏省普通高校研究生科研创新计划项目(KYLX15_1064) （KYLX15_1064）
