喷动床最小喷动速度的计算颗粒流体力学数值模拟  

Simulation of Minimum Spouting Velocity of Spouted Bed Using Computational Particle Fluid Dynamics Method

作　　者：金海安 王东祥 俞建峰 JIN Haian;WANG Dongxiang;YU Jianfeng(School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment&Technology,Jiangnan University,Wuxi,Jiangsu 214122,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江南大学江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《轻工机械》2020年第2期1-7,共7页Light Industry Machinery

基　　金：国家自然科学基金(51606086);中国博士后科学基金(2017M621624)。

摘　　要：为了进一步研究喷动床的操作参数和结构参数对最小喷动速度Ums的影响,以及建立最小喷动速度的预测关联式,课题组建立了二维喷动床数理模型,床的高度为800 mm、宽度为200 mm和厚度为20 mm,喷动气入口底部是夹角为60°的V形结构。采用计算颗粒流体力学(CPFD)方法模拟计算了5种颗粒在3种喷口宽度和在不同静止床高时最小喷动速度变化情况。结果表明:喷动床的结构参数和操作参数对最小喷动速度有着极大的影响,最小喷动速度随着静止床高和颗粒粒径增大而增大,而随着喷口宽度的增大而减小;综合所有数据进行多因素影响回归,得到了新的最小喷动速度预测关联式。研究结果对于喷动床实际操作条件的确定和工艺设计提供了借鉴。For the further study of the effect of the operating parameters and structural parameters of the spouted bed on the minimum spouting velocity(Ums)and the establishment of a reliable predictive correlation of minimum spouting velocity,a two-dimensional numerical model of a spouted bed with a height of 800 mm,a width of 200 mm,a thickness of 20 mm and a cone angle of 60 was proposed.The computational particle fluid dynamics(CPFD)method was used to simulate the variation of the minimum spouting velocity of 5 particles at 3 nozzle widths and at different static bed heights.The results show that the structure parameters and operation parameters of spouting bed have great influence on the minimum spouting velocity,the minimum spout velocity increases with the increase of the height of the static bed and the particle size,while decreases with the increase of the width of the nozzle.Multivariate regression was performed based on all the simulation data and the minimum spout velocity prediction model was derived.The conclusions would provide a guidance and reference in the determination of practical operating conditions and process design of spouted bed.

关 键 词：二维喷动床 计算颗粒流体力学 预测关联式 最小喷动速度 

分 类 号：TQ051[化学工程]