碩士 / 國立成功大學 / 機械工程學系 / 104 / This study applies inverse method and FLUENT to determine the heat transfer and fluid flow characteristics of plate-fin heat sinks with various enclosures and whether to install the axial-flow fan inside and exhaust fan on the cabinet. Using measured data to predict and analyze the average heat transfer coefficient on the fin in limited space. The inverse method along with the finite difference method, least squares fitting method and experimental temperature data are applied to determine the heat transfer coefficient. Since the distribution of the heat transfer coefficient on the fin is not uniform, the plate-fin is divided into several sub-fin regions and the heat transfer coefficient in each sub-fin region is assumed to be unknown constant. To obtain correct heat transfer and fluid flow characteristics of plate-fin heat sinks,choose appropriate flow model and number of grid points is very important. The results indicate that the heat transfer coefficient increase with increasing fin pitch and speed of fan in the opening rectangulr enclosure.. But the average heat transfer coefficient decreases when the heights larger than the optimal height. At the same time, the effect of the heights and the fin pitch decreases because of fans for mixed convection. In order to verify the reliability of the inverse method with predicted results of this paper, the present study also in comparison with the empirical corelations of other relevant literature and CFD simulation packages.
| Identifer | oai:union.ndltd.org:TW/104NCKU5489071 |
| Date | January 2016 |
| Creators | Chung-YiWu, 吳重億 |
| Contributors | Han-TawChen, Chang-Da Wen, 陳寒濤, 溫昌達 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 96 |
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