气液分离室结构对自吸泵水力性能的影响  

Effect of structure of gas-liquid separation chamber in self-priming pump on its hydraulic performance

作　　者：马希金[1,2] 别娟娟 马宇 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州理工大学甘肃省流体机械及系统重点实验室,甘肃兰州730050 [3]中国机械设备工程股份有限公司,北京100055

出　　处：《兰州理工大学学报》2017年第6期60-63,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省科技攻关项目(KG954-3-11)

摘　　要：自吸泵是一种应用广泛的特殊离心泵,其水力性能相比同比转速下的离心泵较低,本文通过改变自吸泵气液分离室两侧的形状来提高其水力性能.基于CFD软件Fluent,采用k-ε湍流模型,对改型设计前后的外混式自吸泵进行了全流场数值模拟.模拟结果表明:经过改型设计,泵的扬程和效率均得到提高;泵腔内的流线平稳整齐,流场得到改善,液体介质流动阻力减小;泵腔内液体介质流动湍动能耗散率减小,紊乱程度降低,能量损耗减少.Self-priming pump is a kind of widely used special centrifugal pump and compared to the centrifugal pump with identical specific speed,its hydraulic performance will be lower,and therefore,will be improved by changing two-sided shape of its gas-liquid separation chamber.The CFD software Fluent is based and k-εturbulence model is used to conduct numeric simulation of the full-flow field in the self-priming pump with outer recirculation before and after its remodeling design.Numerical simulation result shows that after remodeling design,the pump head and efficiency will increase,the hydraulic performance is improved;the streamlines in the pump chamber will be steady in good order,and the flow field will be improved;the flow resistance of the liquid medium will reduce and its turbulent kinetic energy dissipation rate in the pump chamber reduce,so that the disorder degree and energy loss will reduce,also.

关 键 词：外混式自吸泵 气液分离室 水力性能 流线 湍动能耗散率 

分 类 号：TH317[机械工程—机械制造及自动化]