高校化学工程学报2017，Vol.31Issue(4)：776-783,8.DOI:10.3969/j.issn.1003-9015.2017.04.004
喷动床内气固两相流动纵向涡流效应数值模拟
Numerical Simulation of Hydrodynamic Characteristics in a Spouted Bed with Longitudinal Vortex
摘要
Abstract
Effects of longitudinal vortex on gas-solid two phase flow in a spouted bed was numerically studied by Eulerian-Eulerian two-fluid model (TFM) and kinetic theory of granular flow. RUC drag model was chosen to describe interface momentum exchange. Simulation and analysis were performed on three cases (without disturbance units, with a pair of balls and with a pair of longitudinal vortex generators) to study the structure of the spouted bed. Simulation results show that fountain height decreases significantly when the spouted bed has longitudinal vortex generator due to the increase of particle phase flow resistance. The secondary vortex flow emerges in the spouted bed with longitudinal vortex generators and spherical obstacles, which increases the particle radial velocity in annulus zones. Particle concentration increases in spout and fountain zones of the spouted bed, and the turbulent kinetic energy of gas phase and granular temperature are enhanced by longitudinal vortex effects. Therefore, transverse mixing of particles between spout and annulus zones in the spouted bed can be significantly enhanced by longitudinal vortex .关键词
喷动床/纵向涡流/多相传递强化/数值模拟Key words
spouted bed/longitudinal vortex/enhancement of multiphase flow/numerical simulation分类
化学化工引用本文复制引用
张洁洁,吴峰,马晓迅,杨剑..喷动床内气固两相流动纵向涡流效应数值模拟[J].高校化学工程学报,2017,31(4):776-783,8.基金项目
国家自然科学基金项目(21476181) （21476181）
中国博士后科学基金第 8 批特别资助项目(2015T81048) （2015T81048）
第 54 批中国博士后面上一等基金资助项目(2013M540768). （2013M540768）
