撞击流中单颗粒运动行为的数值模拟  

Motions of single particle in the impinging streams

作　　者：刘红娟[1] 邹春[1] 田智威[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2008年第5期106-109,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划资助项目(2004CB217703)

摘　　要：通过采用格子波耳兹曼方法模拟撞击流流场,采用拉格朗日法跟踪颗粒相,对单颗粒在撞击流中的行为进行了数值模拟,得到了不同Re数和不同喷嘴间距H与喷嘴高度W比值(H/W=1,2,4)时颗粒的运动轨迹图,以及颗粒在流场中的最大渗入深度和停留时间.同时,对颗粒在湍流撞击流中的运动规律也进行了初步探讨.计算结果表明,当H/W一定时,随着Re的增大,渗入深度变长,停留时间却变短;而当Re不变时,随着H/W的变大,渗入深度和停留时间都变长.Single particle in the impinging streams was simulated, after the flow field of impinging streams was simulated by lattice Boltzmann method and the particle was traced by Lagrangian method. The diagrams for the particle＇s trajectory, the maximum depth of penetration of the particle and the resident time were presented, for the different Re number and the different ratio （H/W= 1, 2, 4） of the width of the jets H and the height of the jets W. The rules of the particle motion in the turbulent impinging streams were also studied. The computation results show that when H/W was set, the depth of penetration increased and the resident time shortened with the increasing of Re. While Re was

关 键 词：撞击流 层流 颗粒运动 格子波耳兹曼方法 数值模拟 

分 类 号：O35[理学—流体力学]