布液装置影响降膜特性的三维数值模拟  

Three-dimensional falling film characteristics influenced by liquid distributors

作　　者：段林林[1] 高虹[1] 郭玉君[1] 杨晓宏[1] 田瑞[1] 

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010051

出　　处：《膜科学与技术》2017年第2期60-64,共5页Membrane Science and Technology

基　　金：国家自然科学基金资助项目(51266007);内蒙古工业大学风能太阳能利用技术省部共建教育部重点实验室开放基金

摘　　要：对不同孔间距的布液装置影响水平管降膜特性进行了Fluent三维数值模拟研究,通过VOF方法追踪气液交界自由表面,分析了管外液膜的轴向铺展长度、周向角度的液膜厚度分布.结果表明:设定Re=322、布液器孔间距s=8mm时,管外液膜轴向铺展均匀;s=15mm时各自对应的液膜轴向铺展长度的平均值为8.31mm;当z1=50%Z时,s=8mm时液膜厚度最小.根据液膜轴向铺展和周向厚度分布的结果,综合考虑,布液孔间距采用8mm为宜.Three-dimensional numerical simulation of horizontal tube falling film characteristics were carried out on liquid distributors with different hole spacing.VOF method was used to track the free surface of gas-liquid interface.The axial spreading length of liquid film outside the tube,the distributions of filmthickness at different circumferential angles were analyzed.Results show that Re=322,axial liquid film spreads evenly when liquid distributor hole spacing s=8 mm;the corresponding axial spreading average distance of liquid film is 8.31 mm When s=15mm;liquid film thickness is the smallest when z_1=50%Zand s=8mm.According to the results of liquid film axial spreading and circumferential thickness distribution,it is advisable to adopt 8mm spacing between liquid holes.

关 键 词：布液装置 三维数值模拟 液膜厚度 铺展长度 

分 类 号：TQ051.62[化学工程]