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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Effect of position and height of a shield on convective heat transfer performances of plate fin heat sink
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Effect of position and height of a shield on convective heat transfer performances of plate fin heat sink

机译：防护罩的位置和高度对板翅式散热器对流换热性能的影响

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Purpose - The purpose of this paper is to examine the thermal and dynamic performance of the plate-fin heat sink fitted with a shield in the bypass. Design/methodology/approach - The governing equations were solved using the finite volume method based on the SIMPLE algorithm. The k-ω Shear Stress Transport was used to model turbulence. The thermal and dynamic results were presented in term of average Nusselt number and friction factor, respectively. The effect of the height (Hs = 6, 10 and 13) and the position (X = 0, 1/3, 1/2, 2/3 and 3/4) of the shield was studied for a Reynolds number ranging from 2 × 10~3 to 12 × 10~3 and compared with a heat sink without shield. To evaluate the performance of different heat sink geometries, the efficiency was presented and discussed. Findings - By adding a shield in the bypass, a greater amount of air is injected between the heat sink fins, which improves the heat transfer (advantage) of the one part, and increases the friction on the other hand (disadvantage). The efficiency of the heat sink varies inversely proportional with the Reynolds number. Originality/value - The originality of this work is the method for enhancement of heat transfer.
机译：目的-本文的目的是检查旁路中装有屏蔽的板翅式散热器的热性能和动态性能。设计/方法/方法-使用基于SIMPLE算法的有限体积法求解控制方程。使用k-ω剪切应力传输对湍流进行建模。热和动态结果分别用平均努塞尔数和摩擦系数表示。对于雷诺数范围为2的情况，研究了屏蔽的高度（Hs = 6、10和13）和位置（X = 0、1 / 3、1 / 2、2 / 3和3/4）的影响。 ×10〜3至12×10〜3，并与不带屏蔽的散热器进行比较。为了评估不同散热器几何形状的性能，对效率进行了介绍和讨论。发现-通过在旁路中添加屏蔽，大量的空气被注入到散热片之间，这一方面改善了一部分的传热（优点），另一方面增加了摩擦（缺点）。散热器的效率与雷诺数成反比。创意/价值-这项工作的创意是增强传热的方法。

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