机械搅拌反应器内气体分布的数值模拟  

Numerical Simulation OF Gas DIstribution In a Stirred Tank Reactor

作　　者：宋涛[1,2,3] 蒋开喜[2] 周俊武[2,3] 冯昱清 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819 [2]北京矿冶研究总院,北京市100160 [3]矿冶过程自动控制技术北京市重点实验室,北京市102628 [4]CSIRO Mineral Resource Flagship

出　　处：《有色冶金设计与研究》2015年第3期22-26,30,共6页Nonferrous Metals Engineering & Research

基　　金：十二五"863"项目<大型微生物冶金生物反应器>(2012AA061503)

摘　　要：机械搅拌反应器内通常包含气、液、固等多相体系,利用计算流体力学方法针对其内部复杂物料运动的模拟近年来取得了很大进展。欧拉双流体模型被用来模拟一种装配Rushton型叶轮机械搅拌反应器内包含气泡的气液两相流,并通过不同的相间力模型及自定义湍流子模型描述槽内气泡复杂运动。分析了不同曳力、气泡诱导湍流、升力、湍流分散力等模型在模拟气泡分布时的效果,并将模拟结果与Barigou和Greaves的试验结果进行比较。结果表明,提出的模拟方法在机械搅拌反应器模拟中能够得到准确的气体分布结果。Computational fluid dynamics（CFD） contributes a lot in calculations of complicated multi-phase flows in mechanically stirred reactors. To predict the performance of a tank reactor stirred by Rushton turbine, the Eulerian-Eulerian two-fluid method was used for modeling gas-liquid flow in tank, and extra user defined subroutines were incorporated to consider the complex physics.Different modeling methods of drag force, bubble induced turbulence, lift and turbulent dispersion forces were evaluated in the numerical simulations of the bubble distribution in the reactor. The simulation results have been compared with the experimental measurements of Barigou and Greaves. Some reasonable agreements have been obtained both in flow structures and gas distribution.

关 键 词：机械搅拌反应器 气泡流 气液两相流 数值模拟 

分 类 号：TF351.52[冶金工程—冶金机械及自动化]