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基于全耦合CFD-DEM方法的多级混流泵磨损模拟研究 被引量:3

Erosion of multistage mixed flow pump based on fully coupled CFD-DEM method
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摘要 磨损是导致多级混流泵失效的主要原因,采用CFD(Computational Fluid Dynamics)数值模拟方法是设计优化该类泵抗磨损性能的重要手段。该文基于CFD-DEM(Computational Fluid Dynamics-Discrete Element Method)方法,通过自定义相间作用建立了流体与颗粒的全耦合模型,通过与已有实验结果对比,验证了该计算模型的准确性,研究了颗粒浓度、形状和小流量工况对泵叶片磨损的影响。结果表明,混流泵叶轮叶片磨损主要发生在头部和尾部靠后盖板一侧,颗粒浓度和形状对泵叶片磨损位置影响较小,磨损量随浓度增大和球形度减小而急剧增加,另外,流道内颗粒滞留数量与球形度大小有关。 Erosion is the main matter for the damage of multi-stage mixed-flow pumps.CFD(Computational Fluid Dynamics)simulation method is an important method to design and optimize pumps to have a long running time.A user-defined function used to establish a fully coupled model of fluid and particles considering interphase interactions in this paper.The accuracy of model is verified by comparing with existing experimental results.And erosion of pump blades under different particle concentration,shape and small flow conditions are studied.The results show that the erosion of the impeller blades of the mixed-flow pump mainly occurs on the head and tail side of the hub.The particle concentration and shape have a small effect on the wear position of the pump blade.In addition,the number of particles retained in the flow channel is related to the sphericity.
作者 邵文博 赵睿杰 张德胜 SHAO Wen-bo;ZHAO Rui-jie;ZHANG De-sheng(Research Center of Fluid Machinery Engineering and Technology,Zhenjiang 212013,China)
出处 《水动力学研究与进展(A辑)》 CSCD 北大核心 2020年第5期640-648,共9页 Chinese Journal of Hydrodynamics
基金 国家重点研发计划(2017YFC0404203) 航空科学基金(201728R3001) 江苏省重点研发计划(BE2016163) 江苏大学高级人才基金(5501440001)。
关键词 混流泵 液固两相流 磨损 数值模拟 CFD-DEM mixed-flow pump liquid-solid two-phase flow erosion numerical simulation CFD-DEM
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