碩士 / 國立成功大學 / 系統及船舶機電工程學系 / 104 / SUMMARY
A fin shape design problem is considered in this thesis utilizing the Levenberg-Marquardt Method (LMM) and a commercial package CFD-ACE+. The objective is to design the optimal fin shape of the radial heat sink for light-emitting diode (LED) lighting devices and to enhance the cooling performance of the heat sink. The working condition of the heat sink is assumed natural convection condition and the effect of radiation heat transfer between heat sink and air is included. Numerical experiments indicated that by utilizing the fin heights as the design variables, the best heat sink performance can be obtained since the system thermal resistance can be further reduced by 16.8 % and 11.0 % than the original and Type 2 design heat sinks, respectively. Finally, three types of heat sinks with fins are carried on the experimental verification. The results from experiments show that with the designed optimal fin shapes the cooling performance of the heat sink is indeed better than those with the initial and existing fin designs, besides, the numerical and experimental temperature distributions on the measured surfaces are very much similar.
Keywords : Levenberg-Marquardt Method ; heat sink for LED ;
Optimal fin design
| Identifer | oai:union.ndltd.org:TW/104NCKU5345030 |
| Date | January 2016 |
| Creators | Guan-JieWang, 王冠傑 |
| Contributors | Cheng-Hung Huang, 黃正弘 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 77 |
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