This study analyzed the dissipation performance of a heat sink having pin fins placed normally to circular base edge, for a LED bulb heat sink having concentric hollow cylinder and circular base. A numerical approach was employed to analyze the influence of the Rayleigh number, the number of fins, orientation angle, and base radius on the heat sink thermal resistance, and its prediction accuracy was verified via experiments. The influences of the length and number of fins on the heat sink thermal resistance were analyzed, and the thermal resistance was found to be low when the fin length was 3.8 mm and the number of fins was 36. A parametric study was conducted to analyze the heat sink thermal resistance in consideration of the design parameters of the radial heat sink. Moreover, a correlation equation for predicting the thermal resistance of the heat sink was derived, and the thermal resistance of the heat sink could be accurately predicted within 17.3 % error.

本研究针对具有同心空心圆柱体和圆形底座的 LED 灯泡散热器分析了具有垂直于圆形底座边缘放置的针状鳍片的散热器的散热性能。采用数值方法分析了瑞利数、翅片数量、取向角和基部半径对散热器热阻的影响，并通过实验验证了其预测精度。分析了鳍片长度和数量对散热器热阻的影响，发现鳍片长度为3.8mm，鳍片数量为36片时，热阻较低。散热片热阻考虑径向散热片的设计参数。而且，