管翅式换热器迎风侧翅片末端霜层生长模拟研究  

Simulation study on frosting at windward fin end of heat exchanger

作　　者：张龙 宋孟杰 邵苛苛 张旋 沈俊 高润淼 甄泽康 江正勇 ZHANG Long;SONG Mengjie;SHAO Keke;ZHANG Xuan;SHEN Jun;GAO Runmiao;ZHEN Zekang;JIANG Zhengyong(School of Mechanic Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《化工学报》2023年第S01期179-182,共4页CIESC Journal

基　　金：国家自然科学基金项目(52076013,51925605);北京市自然科学基金项目(3212024)。

摘　　要：基于管翅式换热器迎风侧翅片末端存在霜层生长的现象,建立其迎风侧翅片末端霜层生长模型。模拟结果表明,霜层沿气流反方向生长速度最快,且其生长速度随与气流反方向夹角θ的增大而不断减缓,霜层密度及霜层表面温度亦随着θ的增大不断减小,霜层整体呈流线型。3600 s后,θ=0°处的霜层厚度及密度分别是θ=90°处值的1.47倍和1.23倍,前者霜层表面温度比后者高2.2℃。研究成果有望指导提升管翅式换热器的防霜性能。In terms of the phenomenon of frost growth on the windward fin end of a heat exchanger,in this paper,a frosting model on the windward fin end is established.The numerical results show that the frost on the windward fin end of a heat exchanger grows the fastest along the opposite direction of the airflow,and its growth rate gradually decreases with an increase of the angleθ.Besides,frost density and frost surface temperature also decrease with an increase ofθ,and the frost layer is streamlined.After 3600 s,frost layer thickness and density atθ=0°are 1.47 times and 1.23 times larger than those atθ=90°,respectively.Besides,the surface temperature of the frost layer is 2.2℃higher than later one.The results of this paper may help to provide theoretical guidance for delaying or avoiding frosting.

关 键 词：换热器 翅片末端 模拟研究 霜层生长 霜层厚度 霜层密度 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]