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http://dx.doi.org/10.3795/KSME-B.2012.36.4.385

Thermal Analysis of a Radial Heat Sink with Radiation and Natural Convection  

Yu, Seung-Hwan (School of Mechanical Engineering, Hanyang Univ.)
Jang, Dae-Seok (School of Mechanical Engineering, Hanyang Univ.)
Lee, Kwan-Soo (School of Mechanical Engineering, Hanyang Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.4, 2012 , pp. 385-390 More about this Journal
Abstract
A radial heat sink, adopted to LED(light emitting diode) downlight, was optimized. Discrete transfer radiation model (DTRM) was used to calculate radiation heat transfer, and numerical model was verified with experimental results. The effects of number of fin, long fin length and middle fin length on overall thermal resistance and radiation heat transfer were analyzed. As the emissivity increased, thermal resistance decreased due to the increment of radiation heat transfer. The radial heat sink was optimized and optimum number of long fins is 19~28, optimum length of long fin is about half of radius of heat fink and optimum fin ratio is 0.4~0.7.
Keywords
Natural Convection; Radial Heat Sink; Optimization;
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  • Reference
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