ABSTRACT

In this paper, the effects of three parameters on the thermal performance of the vertical cylinder with semicircular fins was investigated experimentally. The fin shape, fin number and input heat flow on the thermal performance are studied effected. Three different heat sink models (SC-0, SC-40, and SC-50) were contrasted in order to choose the best reference model. The result show that the heat transfer coefficient increased up to 30% with SC-0 and SC-40, 27% with SC-0 and SC-50, while the thermal resistance of the radial heat sink was demonstrated to be less than that of SC by 17% with SC-40 and less than 19% with SC-50. Additionally, it was found that, the larger number of fins was more effective at dissipating heat than the smaller number of fins, this can be attributed to the heat transfer occurred under natural convection conditions. Finally, to developed Nusselt number correlation with experimental data, the correlation shows the good agreement with experimental data with error less than $\pm$5%.

摘要

本文通过实验研究了三个参数对半圆形翅片立式圆柱体热性能的影响。研究了翅片形状、翅片数量和输入热流对热性能的影响。对三种不同的散热器型号（SC-0、SC-40 和 SC-50）进行对比，以选择最佳参考型号。结果表明，SC-0和SC-40的传热系数提高了30%，SC-0和SC-50的传热系数提高了27%，而径向散热器的热阻则小于传统散热器的热阻。 SC-40 的 SC 降低 17%，SC-50 的 SC 降低不到 19%。此外，研究发现，较多数量的翅片比较少数量的翅片更有效地散热，这可归因于自然对流条件下发生的传热。最后，$\pm$5%。