Performance investigation of a heatsink with L-shaped fins on a concentric hollow cylindrical tube attached to a round disk

Abstract

This study proposed a heatsink design with efficient heat dissipation to ensure optimal operation and longevity of LED lightbulbs. Assuming the typical form of LED lightbulbs, the heatsink was designed with a base consisting of a concentric hollow cylindrical tube attached to the center of a round disk, and multiple L-shaped fins were installed on this structure. To enhance thermal performance of the heatsink with L-shaped fins, simulations were conducted by varying the deletion fin area and the number of fins. It was confirmed that modifying both the deletion fin area and the number of fins within a certain range was advantageous for improving the thermal performance of the designed heatsink. The simulation methods used for investigating the thermal performance were validated through experiments. Variations in thermal performance were examined based on the Rayleigh number, the number of fins, and the installation angle of the heatsink with L-shaped fins. For the same size and shape of the base, that is, a base consisting of a concentric hollow cylindrical tube attached to the center of a round disk, the heatsink with L-shaped fins was compared to heatsinks with rectangular fins, triangular fins, or perforated staggered fins. The results showed that the heatsink with L-shaped fins exhibited generally lower thermal resistance over installation angles ranging from 0 degrees to 180 degrees. Therefore, the L-shaped fin heatsink proposed in this study is expected to significantly contribute to improving the heat dissipation performance of LED lightbulbs.