水平单管外液膜厚度的CFD模拟  

CFD Modeling of Liquid Film Thickness outside Single Horizontal Tube

作　　者：孙凤丹[1] 许松林[1] 

机构地区：[1]天津大学化工学院

出　　处：《化工机械》2012年第2期198-202,共5页Chemical Engineering & Machinery

基　　金：国家自然科学基金资助项目(20976118)

摘　　要：利用CFD中的VOF模型研究了在不同进料高度、质量流量、管道转速和气流条件下单管外液体流动状况,获得了管外液膜厚度分布图,讨论了各种因素对液膜厚度的影响情况。结果表明,进料高度对液膜厚度基本无影响;在一定流量范围内,膜厚度随着流量的增加而增加;管道转速和气流对液膜厚度的影响具有一定的局限性;平均液膜厚度变化率随着各种因素变化率变化较缓慢。将模拟分析得出的结论与文献结果或经验公式进行比较,发现吻合性较好。VOF model in CFD was employed to investigate liquid flow situation outside the single horizontal cylinder,and to simulate influence of the different liquid-feeding heights,mass flow rate,rotation speed and airflow conditions on the film thickness.The results show that liquid-feeding height has little influence on the liquid film thickness,and in a limited range,the film thickness can rise with the increase of mass flow rate;and rotation speed and airflow conditions can influence the film thickness locally,and the average film thickness variation ratio changes slowly with the variation of above-mentioned factors.Comparing simulation results with literature results or empirical formula proves their good consistence.

关 键 词：水平单管 液膜厚度 计算流体力学 

分 类 号：TQ055.81[化学工程]