鼓泡塔中液相环流速度分布模型  

Modeling of Liquid Circulation in Bubble Columns

作　　者：郭英锋[1] 刘辉[1] 李成岳[1] 

机构地区：[1]教育部可控化学反应科学与技术重点实验室北京化工大学,北京100029

出　　处：《化学工业与工程》2003年第5期292-296,共5页Chemical Industry and Engineering

基　　金：国家"973"计划资助项目(No.G2000048006)。

摘　　要：提出鼓泡塔中液相环流预测的一维流动模型和相应的湍流封闭关系式,并对模型求解方法进行了改进。通过模拟结果和文献数据的对比分析表明,环流速度与塔内液相的流型密切相关。在平稳鼓泡流和剧烈湍流两种流型下,应用本文推荐的涡粘系数关系式可预测液相环流速度的分布,精度令人满意。In this paper,an one dimensional flow model incorporating a new turbulence closure relation based on the turbulence theory is proposed for prediction of the liquid velocity and Reynolds shear stress distributions in bubble columns.It is demonstrated that the predicted results of the mean flow parameters are very sensitive to the eddy viscosities that are dependent on flow regimes.For flows in the homogeneous turbulence regime,it is found that the eddy viscosity correlation presented by the present authors gives the closer predicted results to the experimental data,while in the churn turbulence regime,the Burns and Rice correlation is recommended for predicting of the liquid velocity distributions.The main advantage of the present aproach is that estimation of the flow parameters in the design of bubble columns can be made in a consistent and predictive way.

关 键 词：鼓泡塔 液相环流 速度分布 两相湍流 

分 类 号：TQ021.1[化学工程]