排灌机械工程学报2026，Vol.44Issue(8)：789-797,9.DOI:10.3969/j.issn.1674-8530.24.0182
基于CFD-DEM的螺旋混流式深海矿浆泵内颗粒流动特征
Particle flow characteristics in spiral mixed-flow deep-sea slurry pump based on CFD-DEM
摘要
Abstract
By taking a deep-sea slurry pump with a combined structure of a spiral mixed-flow impeller and diffuser guide vanes as the research object,the computational fluid dynamics and discrete element method(CFD-DEM)coupling method was used to qualitatively and quantitatively analyze the motion law and non-uniform distribution characteristics of particles in the pump under different inflow boundary conditions.The results show that tip clearance leakage and impeller inlet pre-swirl are the main causes of particle deposition at the impeller inlet under low flow conditions.In addition,the variation in the number of particles inside the pump can be divided into two stages:the growth period and the stable period.Under different flow rates,the change trend of the number of particles inside the pump is consistent,and the flow of particles exhibits dynamic non-uniformity in the impeller and dif-fusers.With increasing flow rate,the particle concentration region within the impeller shifts from the pressure surface toward the suction surface of the blade.Under both design and over-design conditions,the periodic non-uniform particle flow phenomenon of particles within the impeller becomes more pro-nounced.Compared to the impeller passage,particles within the diffuser predominantly flow along the working pressure surface and possesses a higher degree of non-uniformity.Except at the high-flow-rate condition,the degree of non-uniform flow in the diffuser is negatively correlated with the flow rate.关键词
固液两相流/深海采矿泵/螺旋混流泵/非均匀流动/数值模拟Key words
solid-liquid two-phase flow/deep-sea slurry pump/spiral mixed-flow pump/non-uniform flow/numerical simulation分类
机械制造引用本文复制引用
马登学,李仁年,江丰佚,尚天阳,申正精..基于CFD-DEM的螺旋混流式深海矿浆泵内颗粒流动特征[J].排灌机械工程学报,2026,44(8):789-797,9.基金项目
国家自然科学基金资助项目(52369018) （52369018）
甘肃省自然科学基金资助项目(22JR5RA249) （22JR5RA249）
甘肃省高等学校创新基金资助项目(2022A2022) （2022A2022）
兰州理工大学红柳优秀青年人才支持计划 （）
