摘要
采用计算流体力学(CFD)数值模拟技术,研究了蜗壳式混流泵在不同叶顶间隙下的水力性能及内部流动特性。通过对流场、涡流和压力分布的分析,揭示了叶顶间隙变化对泵装置扬程、效率及运行稳定性的影响。结果表明,随着间隙尺寸的增大,混流泵的整体效率逐渐下降,且对大流量工况的影响尤为显著。同时,叶顶间隙的增大会导致叶轮区域泄漏涡的增强,影响泵的运行稳定性。
Computational Fluid Dynamics(CFD)simulation technique is used to investigate the hydraulic performance and internal flow characteristics of a volute-type mixed-flow pump under varying tip clearances.Through analysis of flow fields,vortex formation,and pressure distribution,the effects of tip clearance changes on the pump’s head,efficiency,and operational stability are revealed.The results show that with the increase of tip clearance,the overall efficiency of the mixed-flow pump gradually decreases,with the most significant impact observed under high-flow conditions.At the same time,the increase in tip clearance will lead to an increase in leakage vortices in the impeller area,affecting the operating stability of the pump.
作者
成立
颜红勤
蒋红樱
潘卫锋
徐文涛
李加旭
CHENG Li;YAN Hongqin;JIANG Hongying;PAN Weifeng;XU Wentao;LI Jiaxu(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225100 China;Jiangsu Water Conservancy Engineering Technology Consulting Co.,Ltd.,Nanjing 210029 China;Luoyun Hydraulic Project Management Division of Jiangsu Province,Suqian 223800 China)
出处
《江苏水利》
2024年第11期1-7,11,共8页
Jiangsu Water Resources
基金
江苏省水利科技项目(2022055,2023039)。
关键词
蜗壳式混流泵
计算流体力学
叶顶间隙
叶尖泄漏
volute-type mixed-flow pump
computational fluid dynamics
tip clearance
tip leakage
作者简介
成立(1975-),男,教授,博士,研究方向为泵站工程。E-mail:chengli@yzu.edu.cn;通信作者:颜红勤(1973-),男,教授级高级工程师,硕士,主要从事泵站工程技术咨询工作。E-mail:1448625167@qq.com。
