碩士 / 國立成功大學 / 機械工程學系 / 106 / In this study, inverse method and FLUENT are applied to determine the heat transfer and fluid flow characteristics of vertical cylinder heat sinks with longitudinal fins in the cabinet with two kinds of boundary conditions, upward-opening ＆ chimney. Inverse method indicating finite difference method, and least square method is a simple but prompt way to predict the heat performance. In order to using inverse method, the temperature on the fin should be measured, so thermocouples are installed on the fin, which is apart into several small regions, and measure the temperature of these places Inverting the measured data to predict the average heat transfer coefficient, heat transfer rate, and also conjugate with FLUENT to choose the correct simulation setting, including flow model, and grid setting. Through the simulation, the correct temperature field, and flow field could be visible. The results show that the heat transfer coefficient decrease as the number of fins, or the height of fins increase. Besides, heat transfer performance improved significantly as the boundary condition of cabinet from upward-opening to chimney. This change makes more fluid participate in heat dissipation to exchange heat more efficiently. Finally, in order to verify the reliability of predicted results of this paper, the present study also compared with the empirical correlations of other relevant literature. Moreover, the empirical correlation is revised to become more accurate and wide-ranged.
| Identifer | oai:union.ndltd.org:TW/106NCKU5489057 |
| Date | January 2018 |
| Creators | Cheng-YuYeh, 葉承祐 |
| Contributors | Yi-Chun Wang, Han-Taw Chen, 王逸君, 陳寒濤 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 95 |
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