并流旋转床气体出口压降数值分析

气体出口是旋转床的重要组成部分,对旋转床流场与气相压降有着重要的影响。研究并流旋转床结构、构建气体出口物理模型,利用RNG k-ε湍流模型,探索不同气体出口结构对并流旋转床流场的影响。模拟结果表明:具有4个切向气体出口的DCRPB3615型旋转床有利于旋转床内速度分布均匀、降低湍动能,减小气相压降。模拟与实验对比表明,DCRPB3615压降比单一径向出口的CRPB3615型旋转床降低10%左右。

Numerical analysis of pressure drop for gas outlet in co-current rotating packed bed

Gas outlet is a necessary part of co-current rotating packed bed,which has an important influence on the flow field and gas pressure drop.With the researching on structure of the co-current rotating packed bed and the building of physical model of the gas outlet,the influences on the flow field with different gas outlet styles were simulated and compared using RNGk-ε turbulent model.The numerical simulation showed that the velocity in co-current rotating packed bed was well-distributed,the turbulent kinetic energy was reduced and the gas pressure drop decreased in the DCRPB3615 co-current rotating packed bed with four tangential gas outlet.The experimental result indicated that the DCRPB3615 has lower pressure drop than CRPB3615 co-current rotating packed bed.