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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Heat Transfer Capacity of Lotus-Type Porous Copper Heat Sink
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Heat Transfer Capacity of Lotus-Type Porous Copper Heat Sink

机译：莲花型多孔铜散热器的传热能力

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摘要

Lotus-type porous copper is a form of copper that includes many straight pores, which are produced by the precipitation of supersaturated gas dissolved in the molten metal during solidification. The lotus-type porous copper is attractive as a heat sink because a higher heat transfer capacity is obtained as the pore diameter decreases. We investigate a fin model for predicting the heat transfer capacity of the lotus-type porous copper. Its heat transfer capacity is verified to be predictable via the straight fin model, in which heat conduction in the porous metal and the heat transfer to the fluid in the pores are taken into consideration by comparison with a numerical analysis. We both experimentally and analytically determine the heat transfer capacities of three types of heat sink: with conventional groove fins, with groove fins that have a smaller fin gap (micro-channels) and with lotus-type porous copper fins. The conventional groove fins have a fin gap of 3mm and a fin thickness of 1 mm, the micro-channels have a fin gap of 0.5 mm and a fin thickness of 0.5 mm, and the lotus-type porous copper fins have pores with a diameter of 0.3 mm and a porosity of 0.39. The lotus-type porous copper fins were found to have a heat transfer capacity 4 times greater than the conventional groove fins and 1.3 times greater than the micro-channel heat sink under the same pumping power.
机译：莲花型多孔铜是包括许多直孔的铜形式，这些直孔是由凝固过程中溶解在熔融金属中的过饱和气体的沉淀而产生的。莲花型多孔铜作为散热器是有吸引力的，因为随着孔径的减小，可以获得更高的传热能力。我们研究了用于预测莲花型多孔铜的传热能力的翅片模型。通过直翅片模型验证了其传热能力是可预测的，在该模型中，通过与数值分析相比较，考虑了多孔金属中的热传导和孔中流体的传热。我们通过实验和分析都确定了三种类型的散热器的传热能力：常规的槽形翅片，具有较小的翅片间隙（微通道）的槽形翅片和莲花型多孔铜翅片。常规的沟槽式翅片的翅片间隙为3mm，翅片厚度为1mm，微通道的翅片间隙为0.5mm，翅片厚度为0.5mm，莲花型多孔铜翅片的孔径为直径0.3毫米的孔隙率和0.39的孔隙率。发现在相同的泵浦功率下，荷叶型多孔铜散热片的传热能力是传统沟槽式散热片的4倍，是微通道散热器的1.3倍。

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