摘要
从湍流和两相流动的角度全面阐释了分散相颗粒在旋流场中的受力,重点介绍了分散相颗粒在旋流场中所受的颗粒加速度力(巴西特力、视质量力、速度波动力)和由速度梯度引起的力(马格拉斯力、滑移-剪切升力)等。并对在此受力分析基础上建立的分散性运动方程进行了简化分析,指出可以得到分散相径向速度对于径向位置的分布和径向运动特性时间。同时指出旋流场中应力的作用及其与连续相介质阻力的关系,纠正了相关文献的说法。
The received force of particles in the swirling flow field is ana- lyzed based on two-phase flow and turbulent flow theory, in which the force by acceleration and grades of velocity have been expounded. Furthermore, it is pointed out that we can get distribution of radial velocity to radial position and radial time in the hydrocyclone from the equation in base of the analysis of dynamics of particles through predigesting. At the same time, relation between resistance force and effect of received stress of particles is set forth, statements in some relative literatures being corrccted.
出处
《食品与机械》
CSCD
北大核心
2006年第5期74-76,92,共4页
Food and Machinery
关键词
旋流器
颗粒加速度力
速度梯度力
应力
Hydrocyclone
Force attached with acceleration
Force attached with grades of velocity
Stress
