锥形离心分离机中粒子运动的解与实验研究

作为固液及固气两相流中固体颗粒运动的基础性研究,以旋转锥形分离机为模型,水为介质,对不同尺寸的玻璃粒子在容器内的回转流场中的运动建立了动力学模型,并进行两相流在容器内实施连续流动过程中粒子运动全过程的数值解析与可视化实验.动力学模型中除考虑了传统的力外,还考虑了假想质量力、Basset力、Saffman扬力及压力梯度力等多种力的作用.计算中考虑了锥形容器锥角、流体垂直流速及不同粒子直径等参数.结果发现了容器高度、锥角、垂直水流速度、容器旋转速度以及粒子径与粒子分离时间的相互关系.计算结果得到可视化实验结果验证,并证明了其数学模型的正确性.

Numerical Simulation and Visualization Experiment of Solid Particle Motion in Tapered Drum Rotating Type Separator

Being the fundamental research work of solid particle motion in the two-phase flow of solid-liquid or gas-liquid,based on the tapered drum rotating type separator and medium of water,the dynamic model of particle motion in the rotating flow filled with fluid was set up.Simultaneously,the visualization experiment of particle motion was carried out by the high speed camera and compared with the calculation results.In setting up of dynamic model,besides of traditional forces,the forces of imagination mass forc...