低颗粒浓度下离心泵流动特性分析  

Analysis of Flow Characteristics of Centrifugal Pump under Low Particle Concentration

作　　者：翟璐璐 吕蔡瑜 陈旭来 俞迪 郭嘉 Zhai Lulu;Lyu Caiyu;Chen Xulai;Yu Di;Guo Jia(Zhejiang Key Laboratory of Fluid Transport Technology Research,Zhejiang sci-tech university,Hangzhou,Zhejiang 310018,China;Zhejiang Mechanical and Electrical Product Quality Testing Institute Co.,Ltd.,Hangzhou,Zhejiang 310051,China;Zhejiang Institute Mechanical&Electrical Engineering Co.,Ltd.,Hangzhou,Zhejiang 310051,China)

机构地区：[1]浙江省流体传输技术研究重点实验室,浙江理工大学,浙江杭州310018 [2]浙江省机电产品质量检测所有限公司,浙江杭州310051 [3]浙江省机电设计研究院有限公司,浙江杭州310051

出　　处：《化工设备与管道》2023年第4期64-70,共7页Process Equipment & Piping

基　　金：浙江省自然科学基金面上项目(LY23E060007)的资助。

摘　　要：离心泵在石油化工、煤化工等工业领域的水力输送过程中,往往伴随着固体颗粒的存在,运行时固体颗粒会影响离心泵的水力性能,因此对输送含颗粒介质下的离心泵性能研究就显得尤为重要。文中通过实验与数值模拟研究颗粒不同体积分数对离心泵性能、内部流动以及振动特性的影响。结果表明颗粒体积分数的增加会增大叶轮前后腔的压力梯度,降低叶轮的出口速度,增大湍动能,使轴向、径向激振力均值及幅度增大。Centrifugal pump is often accompanied by the existence of solid particles in the hydraulic transportation process of petrochemical,coal chemical and other industrial fields,and the solid particles will affect the hydraulic performance of the centrifugal pump during operation,so it is particularly important to study the performance of the centrifugal pump under the conveying medium containing particles.The effects of different particle volume fractions on the performance,internal flow and vibration characteristics of the centrifugal pump were studied by experiments and numerical simulations.The results show that with the increase of particle volume fraction,the pressure gradient of the front and rear cavities of the impeller is increased,the outlet velocity of the impeller is decreased,the turbulent kinetic energy is increased,and the mean value and amplitude of axial and radial exciting forces are increased.

关 键 词：固液两相流 闭式离心泵 数值模拟:流体激振力 

分 类 号：TH311[机械工程—机械制造及自动化]