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超轻多孔泡沫金属平板热管的传热性能研究

, PP. 72-78

Keywords: 泡沫金属,吸液芯,平板热管,传热,热阻

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Abstract:

以水、乙醇和丙酮为工质,以超轻多孔泡沫金属为毛细吸液芯构造了新型的平板热管,并对其传热性能进行了实验研究。研究了填充工质、充液比、热管放置角度及加热功率等因素对平板热管传热性能的影响。结果表明以超轻多孔泡沫金属为毛细吸液芯可以显著强化平板热管的传热能力,具有优异的均温性能,扩展了平板热管承载高热流密度的能力,可达200W/cm2以上,并减小了平板热管的热阻,热阻最小可达0.09℃/W。在3种工质中,水为最佳工质选择,且当充液比为30%时具有较好的换热效果。

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