倾斜管道内圆柱状颗粒运动的数值模拟  

NUMERICAL SIMULATION OF CYLINDRICAL PARTICLES MOTION IN INCLINED PIPELINE

作　　者：李亮[1,2] 刘炳瑞 张润辉 张斌 LI Liang;LIU Bingrui;ZHANG Runhui;ZHANG Bin(Institute of Fluid Engineering,Department of Mechanics,Zhejiang University,Hangzhou 310027,China;Guangdong Infore Intelligent Sanitation Technology Co.,Ltd,Foshan 528322,Guangdong,China;University of South China,Hengyang 421009,Hunan,China)

机构地区：[1]浙江大学力学系流体工程研究所,杭州310027 [2]广东盈峰智能环卫科技有限公司,广东佛山528322 [3]南华大学,湖南衡阳421009

出　　处：《力学与实践》2022年第5期1172-1178,共7页Mechanics in Engineering

基　　金：湖南省科技创新计划(2020RC4029);广东盈峰智能环卫科技有限公司项目(2021-KYY-508108-0004)资助。

摘　　要：本文采用计算流体力学-离散单元法对倾斜管道内圆柱颗粒在气体中的运动进行数值模拟,分别分析了颗粒密度、颗粒长径比、吸入速度、管道倾角、管道长径比等因素对颗粒输运效率的影响。结果表明,颗粒密度越大,颗粒的输运效率越低;输运效率随着颗粒长径比的增大而减小;输运效率随着进口速度的增大而增大。管道的倾角对输运效率存在影响,但二者不是单调关系;颗粒输运效率与管道长径比成反比。In this paper,the movement of cylindrical particles in inclined pipeline is numerically simulated with computational fluid dynamics-discrete element method(CFD-DEM).The effects of particle density,particle length diameter ratio,suction velocity,pipe inclination and pipe length diameter ratio on the particle transportation efficiency are investigated.The results showed that the higher the particle density is,the lower the transportation efficiency is.The overall transportation efficiency decreases with the increase of the aspect ratio.Additionally,the increase of suction speed is beneficial to improve the particle suction efficiency.Meanwhile,the pipeline aspect ratio has an effect on the efficiency,but the relationship between them is not monotonic.The transportation efficiency is inversely proportional to the pipeline aspect ratio.

关 键 词：输运效率 倾斜管道 柱状颗粒 离散单元法 

分 类 号：O359.2[理学—流体力学]