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An experimental investigation of the natural convection heat transfer from a vertical cylinder using porous fins
Applied Thermal Engineering ( IF 6.4 ) Pub Date : 2020-07-03 , DOI: 10.1016/j.applthermaleng.2020.115673
Suhil Kiwan , Hamzeh Alwan , Nisrin Abdelal

In this study, the thermal impact of using annular porous fins attached to the outer surface of a suspended heated vertical cylinder with constant heat flux was experimentally investigated. The study took place under steady-state and natural convection conditions. Three diameters of Aluminum cylinders and two types of porous material were used with different fin configurations like fin thickness and number of fins. The experimental results showed that the value of the averaged Nu number is a strong function of permeability K. The study showed a clear enhancement of heat transfer when porous fins are used. The minimum enhancement of the heat transfer coefficient was 7.9% when using one fin with a 10 mm thickness, and the maximum enhancement reaches 131% when using a porous layer.



中文翻译:

使用多孔翅片从垂直圆柱体自然对流传热的实验研究

在这项研究中,实验研究了使用环形多孔散热片以恒定的热通量连接到悬浮的加热垂直圆柱体的外表面的热影响。该研究是在稳态和自然对流条件下进行的。使用三种直径的铝制圆柱体和两种类型的多孔材料,并具有不同的鳍片配置,例如鳍片的厚度和鳍片的数量。实验结果表明,平均Nu值是渗透率K的强函数。研究表明,当使用多孔翅片时,传热明显增强。当使用一个厚度为10 mm的散热片时,传热系数的最小增强为7.9%,而使用多孔层时,最大增强为131%。

更新日期:2020-07-17
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