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首页> 外文期刊>International Journal of Heat and Mass Transfer >Measurement of performance of plate-fin heat sinks with cross flow cooling
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Measurement of performance of plate-fin heat sinks with cross flow cooling

机译：带有横流冷却的板翅式散热器性能测量

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摘要

This work assesses the performance of plate-fin heat sinks in a cross flow. The effects of the Reynolds number of the cooling air, the fin height and the fin width on the thermal resistance and the pressure drop of heat sinks are considered. Experimental results indicate that increasing the Reynolds number can reduce the thermal resistance of the heat sink. However, the reduction of the thermal resistance tends to become smaller as the Reynolds number increases. Additionally, enhancement of heat transfer by the heat sink is limited when the Reynolds number reaches a particular value. Therefore, a preferred Reynolds number can be chosen to reduce the pumping power. For a given fin width, the thermal performance of the heat sink with the highest fins exceeds that of the others, because the former has the largest heat transfer area. For a given fin height, the optimal fin width in terms of thermal performance increases with Reynolds number. As the fins become wider, the flow passages in the heat sink become constricted. As the fins become narrower, the heat transfer area of the heat sink declines. Both conditions reduce the heat transfer of the heat sink. Furthermore, different fin widths are required at different Reynolds numbers to minimize the thermal resistance.
机译：这项工作评估了板翅式散热器在横流中的性能。考虑了冷却空气的雷诺数，翅片高度和翅片宽度对散热器的热阻和压降的影响。实验结果表明，增加雷诺数可以降低散热器的热阻。然而，随着雷诺数增加，热阻的减小趋于变小。另外，当雷诺数达到特定值时，通过散热器的传热增强受到限制。因此，可以选择优选的雷诺数以减小泵浦功率。对于给定的散热片宽度，散热片最高的散热器的热性能超过其他散热片，因为前者的传热面积最大。对于给定的翅片高度，就热性能而言，最佳翅片宽度随雷诺数而增加。随着散热片变宽，散热器中的流道变得狭窄。随着散热片变窄，散热器的传热面积减小。两种情况都会减少散热器的热传递。此外，在不同的雷诺数下需要不同的鳍片宽度以最小化热阻。

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