文档介绍：2 2 2
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第 42 卷第 3 期上海交通大学学报 Vol. 42 No. 3
2008 年 3 月 J OURNAL OF SHAN GHAI J IAO TON G UNIV ERSIT Y Mar. 2008
文章编号:1006 2467 (2008) 03 0441 04
翅片管换热器结霜工况的三维数值模拟与分析
谷波, 任能, 刘小川
(上海交通大学制冷与低温工程研究所, 上海 200240)
摘要: 为2解2决翅片管蒸发器结霜过程不易进行数值模拟的难题,利用组分传输与动态网格模型
模拟蒸发器表面霜2 层生长的相变传热、传质过程,建立了结霜工况下翅片管蒸2 发器三维动态传热、
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传质的简化模型. 计算得到了蒸发器表面霜层温度、空气压降及出口处含湿量. 数值计算结果与实
验结果趋势吻合较好.
关键词: 翅片管蒸发器; 结霜; 数值模拟
中图分类号: TB 657. 5 文献标识码: A
Three Dimensional Numerical Simulation of Frost Formation on
Finned Tube Heat Exchanger
GU B o , R EN N eng , L IU X i ao chuan
(Institute of Refrigeration and Cryogenics Engineering , Shanghai Jiaotong University , Shanghai 200240 , China)
Abstract : Frosting on t he surface of finned t ube exchanger is difficult to numerically simulate according to
it s various affected factors. To solve this problem , the species transmission and dynamic mesh model was
introduced to simulate t he heat and mass transfer during t he process of frosting on the cold surface of t he
finned t ube evaporator , t hen a simplified three dimensional dynamic model was presented. The frost sur
face temperature , pressure drop across t he evaporator and absolute humidity at t he exit were obtained.
The numerical result s agree well wit h t he experimental data.
Key words : finned t ube evaporator ; frosting ; numerical simulation
符号说明:
a —指数前因子 h —焓,J/