Abstract Finned heat pipe radiators are popular as heat dissipation system of electronic components due to high reliability. But the inferior airside heat transfer limits its heat dissipation performance. Thus, the metal foam heat pipe radiator is introduced to solve this issue with metal foam substituting fins. The copper foam with 15 PPI (Pores per inch) is adopted to fabricate prototype to explore the performance enhancement. The thermal and flow characteristics are systematically studied and analyzed through experiments under different air velocity and heating power. The study finds that the introduced metal foam significantly reduces the overall thermal resistance by 25.5% in comparison with traditional finned heat pipe radiator. Meanwhile, it predicts that the decrement of the overall thermal resistance is up to 58% by adopting advanced connecting technology. Furthermore, the trade-off between improvement heat transfer and increased flow resistance were evaluated by the performance evaluation index as the function of Colburn j-factor and friction factor, which provides a direct criterion for its practical application. It finds that the comprehensive performance of metal foam heat pipe radiator is much better than that of traditional finned heat pipe radiator especially when Re

中文翻译：

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金属泡沫热管散热器热流特性实验研究

摘要 翅片式热管散热器由于其可靠性高而被广泛用作电子元器件的散热系统。但较差的空气侧传热限制了其散热性能。因此，引入了泡沫金属热管散热器，以金属泡沫代替翅片来解决这个问题。采用15 PPI（每英寸孔数）的铜泡沫制作原型以探索性能增强。通过实验系统地研究和分析了不同风速和加热功率下的热流特性。研究发现，与传统翅片式热管散热器相比，引入的金属泡沫显着降低了整体热阻25.5%。同时，预计采用先进的连接技术，整体热阻下降高达58%。此外，通过作为 Colburn j 因子和摩擦因子的函数的性能评估指数来评估改善传热和增加流动阻力之间的权衡，这为其实际应用提供了直接标准。发现泡沫金属热管散热器的综合性能远优于传统翅片式热管散热器，尤其是当Re