基于Fluent软件数值分析新型旋风筒气固两相流场

采用Fluent软件模拟一具有倾斜顶板、过渡性蜗壳、偏心内筒和倾斜出口的旋风筒的气相流场及颗粒运行轨迹。模拟过程中气体的湍流流动采用RNG k-ε数学模型,生料的颗粒运动采用颗粒随机轨道模型。结果表明：该旋风筒有强涡旋流动,中心区域明显有一气芯柱,近似为入口处速度的2倍;切向速度分布为不对称的驼峰型;蜗壳部位有径向速度分布;该结构更有利于颗粒的气固分离。

Numerical simulation of gas-solid two-phase flow in a new type cyclone preheater based on fluent software

By means of fluent software,the gas flow field and particle trajectory of a new type cyclone preheater,which with incline top,transitional volute chamber,eccentric inner cylinders and sloping outlet,were simulated.The RNG k-ε model and stochastic trajectory model were proposed.The results showed that the strongly swirling flow occurred in the cyclone preheater.There was an obvious gas core column at the center of cyclone preheater,and its speed nearly 2 times as high as the entrance speed.Tangential velocity distribution was asymmetric hump type.The radial velocity of vortex shell was larger than other parts.The particle trajectory showed that this structure was more advantageous to the gas-solid separation.