摘要: 采用离散元法( DEM) 对柱状和球形颗粒在开槽前后正锥形布料盘表面的运动过程进行数值模拟，研究颗粒在锥形布料盘表面的运动速度、布撒轨迹，并探讨开槽前后布料盘直径、转速以及颗粒形状对运动过程的影响。结果表明: 颗粒出盘的水平、竖直速率随布料盘转速和直径的增大而增大; 柱状颗粒出盘的水平、竖直速率略大于球形颗粒；布料盘开槽后颗粒的过槽率随布料盘转速的增大而减小，随布料盘直径的增大而增大；柱状颗粒的过槽率大于球形颗粒；布料盘开槽后颗粒出盘的水平、竖直速率大于开槽前。

关键词: 柱状颗粒；球形颗粒；锥形布料盘；运动特性；数值模拟

Abstract: Discrete element method ( DEM) was used to simulate their motion characteristics of cylindrical and spherical particles on the surface of conical distributor which was slotted before and after．Velocity and trajectory of the particles on the surface of conical distributor were studied．The effects of particle shape，diameter and rotational speed of the distributor being slotted before and after on the motion were studied．The results show that horizontal and vertical velocity of particles out of the distributor increase with the increase of rotating speed and diameter of the distributor．Horizontal and vertical velocity of the cylindrical particle is slightly faster than that of the spherical particle．Rate of the through-slot particle decreases with the increase of the rotational speed of the distributor and increases with the increase of diameter of the distributor．Besides，rate of the cylindrical through-slot particle is higher than that of the spherical particle．Horizontal and vertical velocity of particle out of the slotted distributor is higher than those of none-slotted one．

Keywords: cylindrical particles; spherical particles; conical distributor; motion characteristics; numerical simulation