方形肋阵参数变化对流动沸腾换热影响的实验研究

doi:10.19595/j.cnki.1000-6753.tces.210190

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摘要为掌握肋阵结构参数变化对流动沸腾换热的影响规律,对表贴式肋阵液盒内的流动沸腾换热与两相流动压降特性进行了可视化实验研究。该文采用横截面积为180mm×20mm的液盒作为研究对象,液盒通道为可视化单面加热窄矩形结构。选择肋高度、肋间距、肋横截面积不同的七种肋阵背板,对液盒内部流动沸腾换热特性进行研究。通过可视化观察发现,肋阵明显强化了液盒内的流动沸腾换热过程。对不同肋阵参数对沸腾换热的变化规律进行研究发现,随着肋阵高度和肋阵间距的变化,沸腾传热效果均存在最优值;沸腾传热系数随着单肋横截面积增加而增加;液盒内的流量-阻力压降循环特性对肋阵参数的变化较为敏感,随着肋阵参数的变化均呈现不同程度地向左或向右的漂移现象。该研究结果为方形肋阵结构在表贴式蒸发冷却系统上的工程应用提供了重要依据。

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关键词 ：表贴式, 肋阵, 流动沸腾, 强化换热, 两相压降

Abstract：To explore the influence of the change of rib structure parameters on the flow boiling heat transfer, a visual experimental study is carried out on the flow boiling heat transfer and two-phase pressure drop characteristics in the surface-mounted rib array liquid box. A liquid box with a cross-sectional area of 180 mm×20mm is used as the research object that was a visualized single-sided heating narrow rectangular structure. Seven kinds of rib array backplates with different rib heights, rib spacing, and rib cross-section were selected to study the flow boiling heat transfer characteristics in the liquid box. Through the visual observation of the boiling flow in the liquid box, it is found that The ribs significantly enhance the flow boiling heat transfer in the liquid box. Moreover, the study of the effect of different rib array parameters on boiling heat transfer found that with the change of rib array height and rib array spacing, the boiling heat transfer effect has an optimal value, and the boiling heat transfer coefficient increases as the cross-sectional area of the single rib increases. The flux-resistance pressure drop circulation characteristics in the liquid box are sensitive to the variation of the rib parameters, and the curves show the phenomenon of drifting to the left or the right in different degrees of drift with the changes of the rib array parameters. The research results provide an important basis for the engineering application of the square rib structure in the surface-mounted evaporative cooling system.

Key words： Surface mounted rib array change flow boiling enhanced heat transfer two-phase pressure drop

收稿日期: 2021-02-03

PACS:

TM46

基金资助:中国科学院前沿科学研究重点研究计划资助项目（QYZDY-SSW-JSC026）

通讯作者: 阮琳女,1976年生,教授,博士生导师,研究方向为电气与电子装备蒸发冷却技术。E-mail：rosaline@mail.iee.ac.cn

作者简介: 史一涛男,1986年生,博士,研究方向为电子装备蒸发冷却技术。E-mail：shiyitao@mail.iee.ac.cn

引用本文:

史一涛, 曹瑞, 阮琳. 方形肋阵参数变化对流动沸腾换热影响的实验研究[J]. 电工技术学报, 2022, 37(5): 1275-1284. Shi Yitao, Cao Rui, Ruan Lin. Experimental Study on the Influence of Parameter Change of Square Rib on Flow Boiling Heat Transfer. Transactions of China Electrotechnical Society, 2022, 37(5): 1275-1284.

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