水力旋流器内颗粒受力与运动分析

Mechanics and kinematics analysis of the particles inside hydrocyclones

分析了颗粒在旋流器内的运动,包括颗粒的受力以及液体介质和固体颗粒的运动速度,得出了颗粒主要承受离心力、液体浮力和黏滞阻力的作用,并针对Stokes区、过渡区和牛顿区分别进行了分析.根据所研究颗粒的雷诺数大多满足过渡区条件的实际,建立了颗粒的运动方程.结果表明,颗粒-液体间相对速度在很短时间内即可达到一个相对稳定的值.

The mechanics and kinematics analysis of the particles inside hydrocyclones are described in this paper.The main forces that the particle bears include centrifugal force,liquid floatation force,and liquid drag force.Analysis is made respectively for stokes' region,intermediate region,and turbulent region.In view of the fact that the studied particle fits the condition of intermediate region,the kinematics equation of the particle is established.Results show that the relative velocity between the particle and the liquid can achieve a relative stable value within a very short time.