碩士 / 國立成功大學 / 系統及船舶機電工程學系 / 107 / A shape design problems in determining the optimal geometry of wavy-shaped inverted fins and WPFHS (Wavy-shaped Plate Fin Heat Sink) are discussed in this work in two and three-dimensional domains, respectively. Besides, all the cases are investigated under a fixed volume condition. The commercial software CFD-ACE+ and the Levenberg-Marquardt Method (LMM) are utilized to estimate the optimum design variables.
Based on literature [1], the objective of chapter two is to obtain the optimal shape design of a wavy-shaped cavities penetrated in to a heat generating body by minimizing the average temperature (Tave) of the system. The regular sinusoidal function is considered as a fin profile, and the design variables are amplitude, A, and angular frequency, ω.
In chapter three, the deformed sinusoidal function is adopted on WPFHS. According to literature [2], the changeable sine curve with increasing amplitude and decreasing wavelength simultaneously can enhance the performance of heat sink. In this thesis, the weighting coefficients of amplitude, a, and angular frequency, b, are considered as the design variables for minimizing the average temperature of base plate (Tb).
The results shows that the wavy-shaped design can remarkably enhanced the performance of fin temperature. Finally, experimental results of WPFHS shows the conformity with the numerical data. Also, the temperature distributions between experimental and numerical results are in an excellent consistency. The inverse problems utilizing the Levenberg-Marquardt Method (LMM) can estimate the optimal fin shape successfully and efficiently.
| Identifer | oai:union.ndltd.org:TW/107NCKU5345017 |
| Date | January 2019 |
| Creators | Po-WeiTung, 童柏維 |
| 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 | 93 |
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