竖直翅片间液桥体积计算模型  

Model for calculating water bridge volume retained between vertical fins

作　　者：庄大伟[1] 杨艺菲[1] 胡海涛[1] 丁国良[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《化工学报》2016年第10期4080-4085,共6页CIESC Journal

基　　金：国家自然科学基金项目(51576122);国家自然科学基金创新研究群体科学基金项目(51521004);上海市优秀学术带头人计划项目(16XD1401500)~~

摘　　要：管翅式换热器在析湿工况下会在翅片间形成大量液桥,液桥体积会影响换热器中冷凝水的排出。提出一种将液面弯曲线沿液桥三相接触线积分的方法计算竖直翅片间液桥体积,其中液桥三相接触线采用椭圆方程描述,液面弯曲线模型基于Young-Laplace方程的计算结果拟合得到。通过液桥三相接触线与液面弯曲线观测实验对提出的液桥体积计算模型进行了验证,结果表明,95%的计算结果与实验的误差范围在±15%内,平均误差为7.12%。When a fin-and-tube heat exchanger worked as dehumidifier, lots of water bridges would form between vertical fins and the water volume of these bridges could affect discharge of water condensate. A model for the calculation of water bridge volume was established by integration of meniscus curve along triple contact line of the water bridge. An ellipse equation was used to simulate the triple contact line while a model of meniscus curve at the water-air interface was obtained from calculation results of the Young-Laplace equation. The model for calculating water bridge volume was validated by experimental study on triple contact lines and meniscus curves. The model predicted water volumes of these bridges 95% times aligned with the experimental data within the deviation limit of ±15%, which had a mean deviation of 7.12%.

关 键 词：液桥体积 竖直翅片 模型 数值分析 实验验证 

分 类 号：TK124[动力工程及工程热物理—工程热物理]