管翅式换热器迎风侧翅片末端霜层生长模拟研究

doi:10.11949/0438-1157.20221641

化工学报 ›› 2023, Vol. 74 ›› Issue (S1): 179-182.DOI: 10.11949/0438-1157.20221641

管翅式换热器迎风侧翅片末端霜层生长模拟研究

张龙(), 宋孟杰(), 邵苛苛, 张旋, 沈俊, 高润淼, 甄泽康, 江正勇

北京理工大学机械与车辆学院，北京 100081

收稿日期:2022-12-19 修回日期:2022-12-26 出版日期:2023-06-05 发布日期:2023-09-27
通讯作者: 宋孟杰
作者简介:张龙(1989—)，男，博士，助理研究员，long.zhang@bit.edu.cn
基金资助:
国家自然科学基金项目(52076013);北京市自然科学基金项目(3212024)

Simulation study on frosting at windward fin end of heat exchanger

Long ZHANG(), Mengjie SONG(), Keke SHAO, Xuan ZHANG, Jun SHEN, Runmiao GAO, Zekang ZHEN, Zhengyong JIANG

School of Mechanic Engineering, Beijing Institute of Technology, Beijing 100081, China

Received:2022-12-19 Revised:2022-12-26 Online:2023-06-05 Published:2023-09-27
Contact: Mengjie SONG

摘要/Abstract

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。

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

Abstract:

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 angle $θ$ . Besides, frost density and frost surface temperature also decrease with an increase of $θ$ , and the frost layer is streamlined. After 3600 s, frost layer thickness and density at $θ = 0 °$ are 1.47 times and 1.23 times larger than those at $θ = 90 °$ , 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.

Key words: heat exchanger, fin end, simulation study, frost growth, frost thickness, frost density

中图分类号:

TU 831.6

张龙, 宋孟杰, 邵苛苛, 张旋, 沈俊, 高润淼, 甄泽康, 江正勇. 管翅式换热器迎风侧翅片末端霜层生长模拟研究[J]. 化工学报, 2023, 74(S1): 179-182.

Long ZHANG, Mengjie SONG, Keke SHAO, Xuan ZHANG, Jun SHEN, Runmiao GAO, Zekang ZHEN, Zhengyong JIANG. Simulation study on frosting at windward fin end of heat exchanger[J]. CIESC Journal, 2023, 74(S1): 179-182.

图/表 3

图1 简化的迎风侧翅片末端霜层生长示意图

Fig.1 Schematic of frost growth at the simplified windward fin end

图2 迎风侧翅片末端霜层轮廓图

Fig.2 Profile of frost layer at the windward fin end

图3 迎风侧翅片末端霜层厚度、密度及表面温度分布特性

Fig.3 Distribution characteristics of frost thickness, density and surface temperature at the windward fin end

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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

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