偏心进气式鼓泡反应器内气液流动的大涡模拟  

Large Eddy Simulation of Gas-Liquid Flow in a Partially Aerated Bubble Column Reactor

作　　者：张金利[1] 李晓芳[1] 包佳琨[1] 李韡[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工业与工程》2006年第1期52-58,共7页Chemical Industry and Engineering

基　　金：国家自然科学基金(No.20206023);中石化股份公司科技基金(No.X502012)资助项目

摘　　要：采用气液两相流动的欧拉-欧拉大涡模拟,研究了偏心进气式鼓泡塔内气液两相湍流流动。模拟结果表明:气泡流的运动与气含率的分布与试验结果吻合良好,得到了气液两相湍流瞬态结构形成和演变过程;增大气速使涡结构剧烈变化,液体粘度增高限制了旋涡尺度的发展,反应器高径比减小使涡数量减少。The large eddy simulations （LES） with the Euler-Euler approach is used to study the gas-liquid flow in a partially aerated bubble column. The LES results shows that the bubble swarm motion and gas hold-up distribution agree well with the experiment results. And the process of gas-liquid turbulence transient structures formation and evolvement has been captured through the simulation. Effects of different parameters on the vortex structures are as follows： increasing the gas velocity intensifies the change of the vortex structures, increasing the liquid viscosity inhibits the development of the vortex scale, decreasing the column aspect ratio reduces the quantity of the vortexes.

关 键 词：鼓泡反应器 气液两相湍流 大涡模拟 

分 类 号：TQ021[化学工程]