同轴射流中颗粒流振荡弥散的LES-DPM模拟  

LES-DPM Simulation of Oscillating Dispersion of Granular Flow in Coaxial Jet

作　　者：曹文广[1,2] 刘海峰[1,2] 李伟锋[1,2] 许建良[1,2] 

机构地区：[1]华东理工大学煤气化与能源化工教育部重点实验室,上海200237 [2]华东理工大学上海市煤气化工程技术研究中心,上海200237

出　　处：《华东理工大学学报（自然科学版）》2013年第4期377-382,共6页Journal of East China University of Science and Technology

基　　金：国家重点基础研究发展计划("973"计划)(2010CB227005)

摘　　要：采用大涡模拟(LES)和离散颗粒法(DPM)耦合对颗粒流在同轴射流中的振荡弥散模式进行了模拟。在考虑孔隙率和颗粒间碰撞作用的情况下,在Fluent中通过自定义函数对该模型进行了模拟。数值计算结果表明,LES-DPM能较好地再现颗粒流在同轴射流中振荡弥散的模式,且模拟结果与实验结果吻合较好,获得了振荡弥散时的流场结构,加深了对振荡弥散的了解。Large Eddy Simulation （LES） and Discrete Particle Method （DPM） were used to simulate the oscillating dispersion of the granular flow in the coaxial jet. The gas phase was modeled by LES and the particle-particle collision was considered using hard-sphere model. The influence of the void fraction was also considered. Through the user define function of Fluent, this model was carried out in Fluent. The simulation results revealed that LES-DPM can be used to model the granular flow in the coaxial jet. The flow field of the oscillating dispersion was obtained, which deepened the understanding of the oscillating dispersion.

关 键 词：颗粒流 弥散模式 大涡模拟 离散单元法 

分 类 号：TQ021.1[化学工程]