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新型多折流板式散热器的传热性能

Heat Transfer Performance of a Novel Multi-Baffle-Type Heat Sink.

作者信息

Cao Xin, Liu Huan-Ling, Shao Xiao-Dong

机构信息

Key Laboratory of Electronic Equipment Structure Design, Ministry of Education, School of Electromechanical Engineering, Xidian University, Xi'an 710071, China.

Department of Mechanical, Aerospace and Nuclear, University of Rensselaer Polytechnic Institute, Troy, NY 12180, USA.

出版信息

Entropy (Basel). 2018 Dec 17;20(12):979. doi: 10.3390/e20120979.

DOI:10.3390/e20120979
PMID:33266702
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7512577/
Abstract

A new type of multi-baffle-type heat sink is proposed in this paper. The heat-transfer coefficient and pressure drop penalty of the employed six heat sink models are numerically investigated under five different inlet velocities. It is shown that Model 6 (M6) has excellent heat transfer performance as its heat-transfer coefficient reaches a value of 1758.59 W/mK with a pressure drop of 2.96 × 10 Pa, and the temperature difference between the maximum and the minimum temperature of the heating surface is 51.7 K. The results showed that the coolant for M6 is distributed evenly to each channel at the maximal degree. The phenomena of the maldistribution of temperature is effectively improved. Moreover, the thermal resistance and thermal enhancement factor for the six models is also examined. M6 possesses the lowest total thermal resistance and largest thermal enhancement factor compared to the other five models. Furthermore, an experimental platform is set up to verify the simulation results obtained for M6. The simulated heat-transfer coefficient and pressure drop values agree well with the experimental results.

摘要

本文提出了一种新型的多折流板型散热器。在五种不同的入口速度下，对所采用的六种散热器模型的传热系数和压降损失进行了数值研究。结果表明，模型6（M6）具有优异的传热性能，其传热系数达到1758.59W/mK，压降为2.96×10Pa，加热表面最高温度与最低温度之差为51.7K。结果表明，M6的冷却液在最大程度上均匀分布到每个通道。温度分布不均的现象得到有效改善。此外，还考察了六种模型的热阻和热增强因子。与其他五种模型相比，M6具有最低的总热阻和最大的热增强因子。此外，搭建了实验平台以验证M6的模拟结果。模拟的传热系数和压降值与实验结果吻合良好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d10d/7512577/d3d5213bdbdb/entropy-20-00979-g015.jpg
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