排灌机械工程学报2025，Vol.43Issue(9)：873-880,8.DOI:10.3969/j.issn.1674-8530.25.0056
高体积分数及大直径颗粒工况下低比转数泵叶轮的磨损特性
Wear characteristics of low-specific-speed pump impeller under high-volume fraction and large-size particle conditions
摘要
Abstract
To address the wear issues in low-specific-speed centrifugal pumps under high-volume frac-tion and large-size particle conditions,an experimental and numerical simulation combined approach was employed to investigate the wear characteristics inside the impeller.A test pump was designed for wear experiments,and the results reveal that the primary wear regions of the impeller are concentrated in the front section of the flow channel,including the first half of the pressure side of the blades,the first sixth of the suction side,the periphery of the rear shroud hub,the intersection area between the front shroud and the blades,and the flow channel inlet.Based on computational fluid dynamics(CFD),the solid-liquid two-phase flow was numerically simulated using the particle inhomogeneous flow model.The simulation results demonstrate that solid particles are unevenly distributed in the flow channel,with noticeable particle accumulation in the inlet region and a higher particle volume fraction near the pressure side of the blades.The impact angles of particles are larger in the front section of the impeller flow channel but smaller in the rear section.By combining the vector cross-product principle to extract particle impact angles,the Oka wear model is integrated with the Eulerian-Eulerian method,enabling accurate prediction of impeller wear under high-volume fraction and large-size particle condi-tions.The predicted results show good agreement with experimental data,providing a theoretical foun-dation and engineering reference for the anti-wear optimization design of low-specific-speed centrifugal pumps.关键词
低比转数离心泵/磨损/冲击角度/高体积分数/大直径颗粒Key words
low-specific-speed centrifugal pump/wear/impact angles/high-volume fraction/large-size particles分类
农业科技引用本文复制引用
赵会宾,韩伟,宾立,郭亮,江雄,龙江少,甄卫卫..高体积分数及大直径颗粒工况下低比转数泵叶轮的磨损特性[J].排灌机械工程学报,2025,43(9):873-880,8.基金项目
湖南省教育厅科学研究项目(24C1006) （24C1006）
