列车用V型格栅气粒分离特性的数值模拟  

Numerical Simulation of Gas-particle Separation Property of the V-shaped Grille Used in Trains

作　　者：龚光彩[1] 任中俊[1] 陈可[1] 李孔清[1] 马扬[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《铁道学报》2006年第4期38-44,共7页Journal of the China Railway Society

基　　金：科技部社会公益专项(2001DA10001)

摘　　要：采用多流体模型,即把颗粒相作为连续介质,同时考虑颗粒相对流体相的影响,根据该V型格栅的实际使用条件设定了对应参数,使用欧拉系下k-ε双方程模型模拟出含尘气流通过V型格栅时的气粒分离特性。计算了V型格栅内气粒两相流动,从而揭示了其内部气相压力场的分布与颗粒相浓度场的基本特征。并将模拟结果和试验结果作了比较和分析,阐明了利用CFD技术在工程设计实施前或产品生产(改造)前预测方案的实际效果与产品性能的可行性。The turbulent gas flow and particle motion in the V-shape grille were investigated by numerical simulation. In particular the gas-particle separation property of the two-phase flow was investigated. The gas flow was obtained by the well-established turbulence model of the κ-ε double-equation. Particles were treated by the multi-fluid model. Comparison of simulation result against experimental data and related analysis concerning the discrepancy between the two was made. At the end of the paper, some advice concerning CFD application is put forward for the further study in this field.

关 键 词：κ-ε双方程模型 多流体模型 气粒分离特性 CFD 

分 类 号：U211.24[交通运输工程—道路与铁道工程]