Experimental investigation of the flow and heat transfer performance in micro-channel heat exchangers with cavities

被引：51

作者：

Huang, Binghuan ^{[1
]}

Li, Haiwang ^{[2
]}

Xia, Shuangzhi ^{[3
]}

Xu, Tiantong ^{[2
]}

机构：

[1] Beihang Univ, Sch Energy & Power Engn, Beijing, Peoples R China

[2] Beihang Univ, Res Inst Aeroengine, Beijing, Peoples R China

[3] XinShidai Engn Consultat Co Ltd, Beijing, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2020年 / 159卷

基金：

中国国家自然科学基金;

关键词：

Micro-channel heat exchanger; Cavity; Heat transfer performance; Pressure drop; FAN-SHAPED RIBS; HYDRAULIC CHARACTERISTICS; BRINKMAN NUMBER; LAMINAR-FLOW; SINK; ENHANCEMENT; SIDEWALLS;

D O I：

10.1016/j.ijheatmasstransfer.2020.120075

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Micro-channel heat exchangers are widely applied in many industrial fields. Compared with conventional scale channels, micro-channels are of larger surface-to-volume ratio and higher heat transfer rate with more miniaturized scale and lower weight. In this study, micro-channel heat exchangers with cavities in two different shapes were designed and fabricated, and experiment research were conducted to analyze the influence of the shape, expansion and contraction cross-sectional lengths of cavities on flow and heat transfer characteristics. The results indicate that compared with straight channel, adding cavities in micro-channels could achieve heat transfer enhancement and pressure drop reduction simultaneously. The detailed effects of the shape as well as the expansion and contraction cross-sectional lengths of cavities on the heat transfer and the pressure drop are also revealed. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：10

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