自由下落微粒流中气固两相流的数值模拟  

Numerical Simulation of Gas-solid Two-phase Flow in Free Falling Particles

作　　者：李小剑[1] 刘泽勤[1] 陆佩强[1] 

机构地区：[1]天津商学院机械工程学院,天津300134

出　　处：《天津商学院学报》2006年第6期70-73,共4页Journal of Tianjin University of Commerce

基　　金：天津市科技发展计划资助项目(043114411)

摘　　要：在微粒流的自由下落过程中,环境空气会被卷吸到微粒流中,形成微粒羽流,有关微粒羽流与环境空气关系的基础理论及数值模拟研究文献相对较少。本文通过RNGk-ε模型对二维微粒羽流中的微粒与环境空气的耦合进行数值模拟,并讨论了微粒羽流速度分布、微粒羽流密度与羽流的流速变化关系,以及微粒羽流质量流对羽流流速的影响。In the process of free falling of particle stream, the ambient air may be drawn into the particle stream to form a particle plume. The relevant literature of the fundamental research and the numerical simulation in particle plumes and the environmental air are quite limited. This paper simulates, on the basis of the RNG κ-ε model, the two-dimensional coupling between the particle plume and the ambient air. The velocity distribution of the particle plume, the varied relationships between the density of the particle plume and the plume velocity, the influence of the mass flow rate of the particle plume on the plume velocity are also discussed.

关 键 词：微粒羽流 流速特征 自由下落 数值模拟 

分 类 号：TB131[理学—物理]