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首页> 外文期刊>International Journal of Refrigeration >Experimental investigation on buoyancy-induced convection in aluminum metal foams
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Experimental investigation on buoyancy-induced convection in aluminum metal foams

机译:铝金属泡沫中浮力诱导对流的实验研究

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In this work, we studied the thermal performance of aluminum metal foams in buoyancy-induced convection. We investigated the effect of heat transfer performance on metal foam fins heated from below due to the use of different aspect-ratio. The samples used in the trial were characterized by a square base of 50 mm length and seven different heights, which ranged from 10 mm to 150 mm. The samples were made of aluminum metal foam characterized by 5 PPI and a porosity of 0.95. The analysis showed that the heat dissipation increased asymptotically with the height of the sample. The results also showed that the Darcy characteristic length should be not correlated to the sample height. A novel empirical correlation is proposed for the computation of Nusselt number as a function of Rayleigh and Darcy numbers, and a shape function eta. (C) 2017 Elsevier Ltd and IIR. All rights reserved.
机译:在这项工作中,我们研究了浮气诱导对流中铝金属泡沫的热性能。 我们研究了传热性能对下面加热的金属泡沫鳍片的影响,由于使用不同的纵横比。 试验中使用的样品的特征在于50mm长度为50mm的方形底座和七个不同的高度,其范围为10mm至150mm。 样品由铝金属泡沫制成,其特征在于5 ppi和0.95的孔隙率。 分析表明,随着样品的高度,散热耗散增加渐近。 结果还表明,达西特征长度应与样品高度不相关。 提出了一种新的经验相关性,用于计算作为瑞利和达西数的函数,以及形状函数ETA。 (c)2017年Elsevier Ltd和IIR。 版权所有。

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