LI Donghui, LIU Bo, ZHANG Xiaoyi, LIU Zhenye

(College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China)

Abstract: In order to study the law of movement and diffusion between different particle phases in an impinging stream reactor, considering the rotation and collision of particles, a three-dimensional Euler-Lagrangian model was established, and a combination of computational fluid dynamics and discrete element method was used to simulate the particle movement and diffusion state of two kinds of particle phase in the gas-solid two-phase collision stream. The trajectory of particles in the impinging flow field and the changes in the number of collisions between particles under different gas inlet speeds and nozzle distance conditions were analyzed. The results show that under the same conditions, with the nozzle distance increasing, and the change trend of the number of collisions between the two particles increases and then decreases.It reaches the maximum when the ratio of the nozzle spacing to the nozzle diameter is 4 and the increasing in gas velocity has little effect on the number of particle collisions in the impact zone.

Keywords: impinging stream； discrete element method； particle collision； gas-sold particle flow

中图分类号：TQ027

文献标志码：A

文章编号：1008-5548(2021)05-0011-09

DOI:10.13732/j.issn.1008-5548.2021.05.002

收稿日期： 2021-02-08，修回日期：2021-02-28，在线出版时间：2021-08-17 13:30。

基金项目：国家重点研发计划项目，编号：2018YFB2001300。

第一作者简介：李东晖(1995—)，男，硕士研究生，研究方向为气固两相流混合特性。E-mail：ldh1907@163.com。

通信作者简介：柳波(1968—)，男，博士，副教授，硕士生导师，研究方向为气力输送技术。E-mail：liuboyh@126.com。