The reduction in energy consumption through the energy performance improvement in the use of artificial lighting system found in all sectors of the economy is one of the very important strategies of achieving sustainable energy development. In contrast to conventional lighting, light-emitting diodes (LEDs) provide better energy efficiency. To effectively optimize the performance and efficiency of the LED lighting, the LED heat needs to be dissipated adequately. In the present work, the cooling performance of a radial heat sink with trapezoidal fins is numerically investigated under the consideration of natural convection and radiation. The study investigated the influence of the number of fins , the height of the fins () and the applied heat flux () on the thermal resistance () and heat transfer coefficient () of the heat sink. The numerical results obtained from this work were validated with literature, and an excellent agreement was established. The results found that both the and the of the heat sink decreased as the number of fins () and fin height () increased. Meanwhile, the number of fins () has an optimal value for achieving the heat sink's effective cooling performance.

中文翻译：

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自由对流和辐射的计算流体动力学对梯形翅片散热器发光二极管应用热性能的影响


通过在所有经济部门使用人工照明系统来提高能源绩效来减少能源消耗是实现可持续能源发展的非常重要的战略之一。与传统照明相比，发光二极管 (LED) 提供更好的能源效率。为了有效优化LED照明的性能和效率，需要充分散发LED热量。在目前的工作中，在考虑自然对流和辐射的情况下，对具有梯形翅片的径向散热器的冷却性能进行了数值研究。研究调查了翅片数量、翅片高度 () 和施加的热通量 () 对散热器热阻 () 和传热系数 () 的影响。从这项工作中获得的数值结果经过文献验证，并建立了良好的一致性。结果发现，随着翅片数量（）和翅片高度（）的增加，散热器的 和 均减小。同时，翅片的数量()具有实现散热器有效冷却性能的最佳值。