钢液中球状夹杂物颗粒受力情况的数值模拟  

Numerical simulation of the force condition of spherical inclusion particles in liquid steel

作　　者：王耀[1,2] 李宏[1,2] 郭洛方[1,2] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《北京科技大学学报》2013年第11期1437-1442,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(51074020)

摘　　要：通过理论分析和数值模拟的方法,研究了1873 K钢液中球状夹杂物颗粒运动过程中的受力情况.静止钢液和湍流场中,夹杂物颗粒所受的压力梯度力、虚拟质量力、Sa?man力及Magnus力较小,可以忽略不计.静止钢液和均匀湍流场中,随着夹杂物颗粒尺寸的变大,颗粒所受Brown力逐渐衰减,当夹杂物颗粒直径大于20μm时颗粒所受Brown力基本不会对其运动造成影响,可以忽略不计.小于10μm的夹杂物颗粒布朗运动较为剧烈,单位质量夹杂物颗粒所受Basset力和Brown力较大,成为主导夹杂物颗粒运动的主要作用力;尺寸较大的夹杂物颗粒(直径D>50μm),Basset力、质量力和Stokes力共同作用影响夹杂物颗粒的运动、碰撞和去除.The force condition of spherical inclusion particles i~ 1873 K liquid steel was investigated by theoretical analysis and numeric simulation. It is found that the pressure gradient Force, virtual mass force, Saffman force and Magnus force are little and can be ignored in static steel and turbulent flow fields. With increasing inclusion particle size, the Brown force imposed on the particles with a bigger size gradually decreases in static liquid steel and homogeneous turbulence fields. When the particle size is bigger than 20 ~tm, the Brown force will have no influence on particle movement and can be ignored. The Brown motion of the particles with the size smaller than 10 ~m is very violent, the Basset force and Brown force imposed on the particles per unit mass become the main force determining particle movement. As for the big-size particles （D^50 ~tm）, the Basset force, mass force and Stokes force work together to influence the movement, collision and removal of the particles.

关 键 词：炼钢 夹杂物 受力分析 运动方程 数值方法 

分 类 号：TF703.54[冶金工程—钢铁冶金]