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Ultralightweight Compact Heat Sinks With Metal Foams Under Axial Fan Flow Impingement

机译:轴流风扇冲击下的金属泡沫超轻巧紧凑型散热器

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摘要

Experimental results of ultralightweight compact heat sinks with open-celled copper (Cu) foams under the impingement of axial fan flows are presented. The thermal resistance of the system and the pressure coefficient on heat sink base plate were measured, focusing on the influences of foam height (Hf) and impinging distance between fan exit and base plate (H). With the impinging distance fixed at H/D = 0.5 (D being the fan diameter), it is demonstrated that an optimum foam height exists at Hf/D = 0.22, providing the lowest thermal resistance. Furthermore, with the foam height fixed at H_f /D = 0.22, reducing the impinging distance to the foam height level reduces the thermal resistance further. In comparison with conventional aluminum (Al) plate-fin heat sinks under identical flow conditions, the Cu foam heat sinks require only 30% of the weight and 50% of the volume to achieve a similar level of heat dissipation performance.
机译:提出了带有开孔铜泡沫的超轻巧紧凑型散热器在轴流风扇流的冲击下的实验结果。测量了系统的热阻和散热器底板上的压力系数,重点是泡沫高度(Hf)和风扇出口与底板之间的撞击距离(H)的影响。在撞击距离固定为H / D = 0.5(D为风扇直径)的情况下,证明了最佳泡沫高度存在于Hf / D = 0.22时,提供了最低的热阻。此外,在泡沫高度固定为H_f / D = 0.22的情况下,减小到泡沫高度水平的冲击距离进一步减小了热阻。与在相同流动条件下的常规铝(Al)板翅式散热器相比,Cu泡沫散热器仅需要30%的重量和50%的体积即可达到相似的散热性能。

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