高炉风口回旋区颗粒运动的DEM-CFD数值模拟  

Numerical simulation of particle motion in raceway of blast furnace by coupling between DEM and CFD

作　　者：孙俊杰[1] 周恒[1] 罗志国[1] 邹宗树[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《钢铁研究》2015年第3期9-12,共4页Research on Iron and Steel

摘　　要：为了模拟风口回旋区内焦炭颗粒的运动情况,建立了DEM-CFD耦合模型。模型充分考虑了颗粒与气体之间的曳力、压力梯度力、虚假质量力、升力等相间力,对回旋区形成过程及大小进行了颗粒尺度的分析,用数值模拟的手段获得风口回旋区颗粒运动的回旋趋势,得到此处颗粒的速度矢量场、气相体积分数、颗粒速度标量云图。结果显示4s时回旋区在风口前形成且稳定,靠近回旋区中心颗粒运动速度最大,远离回旋区中心的颗粒速度减小。计算结果同物理模拟的结果是一致的。To simulate the movement of char particles in raceway,the DEM-CFD coupling model was established.The interaction forces between particle and gas including drag force,pressure gradient force,virtual mass force and lift force were fully considered in model.The forming process and size of raceway on a particle scale were analyzed.The trend of cyclotron motion of particles in raceway was obtained by numerical simulation,and the velocity vector fields of particles,the particle phase volume fraction and the scalar velocity nephogram of particles in front of tuyere were obtained.The results showed that a stable cavity was formed at 4sin front of the tuyere,the particle velocity was the greatest in the central area of the raceway and the particle velocity reduced far away from the central area of the raceway.The calculation result was consistent with the physical experiment result.

关 键 词：风口回旋区 离散单元模型 两相流 数值模拟 颗粒速度 

分 类 号：TQ021.1[化学工程]