氟里昂蒸汽-不凝性气体物系纵翅强化表面膜状凝结换热研究  

LAMINAR FILM CONDENSATION OF FREON-AIR MLXTURE ON HIGH PERFORMANCE VERTICAL CONDENSING SURFACE WITH PARALLEL LOW FINS

作　　者：魏保太 员雪燕 

机构地区：[1]天津大学

出　　处：《工程热物理学报》1990年第1期62-65,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金

摘　　要：为探索从理论上求解不凝性气体对机加工纵翅强化表面蒸汽凝结换热的影响规律,作者在现有研究成果[1、2、3、4、5]的基础上,构思、建立了氟里昂-空气物系三角形纵向翅表面膜状凝结换热的数学物理模型,并采用分段积分求解的方法,将上述复杂的三维双边界层凝结换热,简化为三个区域的二维凝结问题,获得成功。揭示了大分子量蒸汽(氟里昂)和小分子量不凝性气体(空气)物系体积力凝结换热过程诸参数(包括液膜厚度δ_l、界面温度T_i、壁面温度T_w、气体浓度W_g和换热系数α等)的变化规律。Laminar film condensation of vapor with noncondensable gas on high performance condensing surface with parallel low fins has been investigated both theoretically and experimentally. A mathematical model has been proposed and its numerical solution has been obtained. The experiment of condensation heat transfer was done by using R113-Air mixture and the results are coincident with the theoretical calculation very well.

关 键 词：气体 机加工 纵翅 表面 换热 

分 类 号：TK121[动力工程及工程热物理—工程热物理]