珠状凝结换热的数学物理模型及数值模拟  

MATHEMATICAL AND PHYSICAL MODEL AND NUMERICAL SIMULATION OF DROPWISE CONDENSATION HEAT TRANSFER

作　　者：吴玉庭[1] 杨春信[1] 袁修干[1] 马重芳[2] 

机构地区：[1]北京航空航天大学,北京100083 [2]北京工业大学,北京100022

出　　处：《计算物理》2001年第4期334-340,共7页Chinese Journal of Computational Physics

基　　金：国家自然科学基金 ( 5 970 60 0 7)资助项目

摘　　要：首次应用随机分形模型建立了珠状凝结液滴的空间和尺度分布 ,然后利用已有的单个液滴的传热规律 ,得到了冷凝壁面的换热边界条件 ,进而求解冷凝壁的温度分布 ,最后得到了平均的珠状凝结换热系数 .应用上述模型对铜表面以水为介质的冷凝壁换热进行了直接数值模拟 ,并与各种压力条件下的试验数据进行了比较 .A random fractal model of the drop size and space distribution in dropwise condensation is presented.The boundary conditions of heat conduction through the condensate wall are defined by use of the heat transfer model through a single drop proposed by Rose.Thus,the mathematical model of dropwise condensation heat transfer is established.A numerical simulation of dropwise condensation heat transfer of water on the copper wall has been performed.The results agree well with the bulk of existing experimental data and the precision is higher than that of the model proposed by Rose.

关 键 词：珠状凝结 换热 数学物理模型 数值模拟 分形 传热 冷凝壁 液滴 

分 类 号：TK124[动力工程及工程热物理—工程热物理]