排灌机械工程学报2025，Vol.43Issue(8)：772-778,7.DOI:10.3969/j.issn.1674-8530.23.0168
大颗粒固液两相流流动特性及叶轮磨损特征
Flow characteristics of large-particle solid-liquid two-phase flow and impeller wear characteristics
摘要
Abstract
The motion characteristics of large particles in a vertical pipe under different flow rates were investigated on a closed-loop test rig.Meanwhile,the wear characteristics of the impeller when the pump was transporting solid-liquid two-phase flow were analyzed.High-speed photography techno-logy was employed to capture the motion images of particles in the transparent pipe section,and para-meters such as the motion trajectory,axial velocity,and radial velocity of the particles were analyzed.Moreo-ver,the wear mechanism of the impeller was further explored by applying paint to its surface and docu-menting the paint detachment at various time intervals.The research results indicate that as the flow rate increases,both the average axial velocity and the average absolute radial velocity of the particles within the vertical pipe exhibit an upward trend,while the velocity difference between the particles and the fluid gradually decreases.Impeller wear initially occurs at the leading edge of the blades and pro-gressively extends to the front cover,rear cover,and the blades over time,with the rear cover experien-cing the most significant wear.Within the impeller,the Coriolis force plays a dominant role in influen-cing the motion characteristics of the particles compared to the centrifugal force,causing the particles to preferentially move along the pressure side of the blades,which results in more pronounced wear.关键词
固液两相流/垂直管道/泵/磨损/高速摄像技术Key words
solid-liquid two-phase flow/vertical pipe/pump/wear/high-speed photography分类
农业科技引用本文复制引用
乔金宇,徐生玮,李明辉,史连,刘磊,滕爽..大颗粒固液两相流流动特性及叶轮磨损特征[J].排灌机械工程学报,2025,43(8):772-778,7.基金项目
国家市场监督管理总局科技计划项目(2021MK060) （2021MK060）
