LU Xingfu¹,ZUO Zhijian²,GONG Shuguang²,LIU Kejian¹,XIE Guilan²

(1.Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410015,China; 2.School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China)

Abstract:In order to study separation characteristics of particles with different densities in a rotating drums with different structures,discrete element method(DEM)simulations were conducted for density-driven separation characteristics in a rotating drum without lifter,with lifers on the inner side of side-wall,and with a lifter in the center.The flow form of particles in the rotating drums with different structures was analyzed in terms of the velocity field distribution,the radial and axial distribution of particles.And the influence of rotating drums with different structures on separation characteristics of particles was discussed based on the statistical method.The results show that the separation of particles in rotating drums includes two forms of radial and axial separation.The rotating drum with lifters on the inner side of side wall can effectively promote the particle speed,and the rotating drum with lifters in the center can reduce the particle speed.Particles in the rotating drum without lifter have the best separation characteristics,while particles in the rotating drum with lifter in the center have the worst separation characteristics.

Keywords:rotating drum;separation of particles;discrete element method;separation index

中图分类号： TD97                              文献标志码：A

文章编号：1008-5548(2022)02-0070-09

DOI:10.13732/j.issn.1008-5548.2022.02.009

收稿日期： 2021-08-10，修回日期：2021-10-08，在线出版时间：2022-01-29。

基金项目：国家自然科学基金项目，编号：51475403。

第一作者简介：卢兴福(1985—)，男，工程师，博士，研究方向为机械设备力学行为分析。E-mail：13357213891@126.com。

通信作者简介：左志坚(1984—)，男，讲师，博士，研究方向为颗粒介质力学和CAE技术理论与应用。E-mail：zuozhijian@foxmail.com。