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Analytic approach to thermal optimization of horizontally oriented radial plate-fin heat sinks in natural convection

机译:自然对流中水平定向径向板翅式散热器热优化的解析方法

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摘要

In this study, horizontally oriented radial plate-fin heat sinks in natural convection are optimized analytically and experimentally. The thermal resistance is selected as an objective function under the constraint of a given base-to-ambient temperature difference. For thermal optimization, a new correlation of the heat transfer coefficient for the radial plate-fin heat sinks is developed using the asymptotic method and validated experimentally. While the existing correlation has a limited applicable range, the newly developed correlation covers complete ranges of the three design parameters for a fin geometry: fin thickness (t), fin length (L), and number of fins (n(fin)). Using this new correlation, the thermal performance of a radial plate-fin heat sink is optimized with respect to these three design parameters. Finally, optimum fin geometries for applications with various sizes are obtained, since the newly suggested correlation is applicable to various physical sizes which are characterized by the base diameter (D) and the fin height (H).
机译:在这项研究中,自然对流中水平定向的径向板翅式散热器在分析和实验上得到了优化。在给定的基准到环境温度差的约束下,选择热阻作为目标函数。为了进行热优化,使用渐近方法建立了径向板翅式散热器的传热系数的新关系并进行了实验验证。虽然现有的相关性具有有限的适用范围,但新开发的相关性涵盖了鳍几何形状的三个设计参数的完整范围:鳍厚度(t),鳍长度(L)和鳍数(n(fin))。利用这一新的相关性,针对这三个设计参数优化了径向板翅式散热器的热性能。最后,由于新建议的相关性适用于以底径(D)和翅片高度(H)为特征的各种物理尺寸,因此获得了适用于各种尺寸的最佳翅片几何形状。

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