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 a pair of vortex generators in a cross flow channel. Using measured data to forecast and analyze the average heat transfer coefficient on the fin in limited space. The inverse method along with the finite difference method and experimental temperature data is 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. The effect of the attack angle of the vortex generators, the height of the vortex generators, and the Reynolds number on the thermal-fluid performance of the plate-fin heat sink are elucidated. The results indicate that the heat transfer coefficient increases when install a pair of vortex generators, because the air can easily flow into the heat sink. Regarding the effect of the attack angle of the vortex generators on the thermal performance, the highest average heat transfer coefficient is achieve when the attack angle of the vortex generators is , but the pressure difference also increases with increasing the attack angle of the vortex generators. Regarding the effect of the height of the vortex generators, the pressure difference increases with increasing the height of the vortex generators. In addition, the highest average heat transfer coefficient is achieve when the height of the vortex generators is half of the height of the heat sink. 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 correlations and experimental results of other relevant literature and CFD simulation packages.
| Identifer | oai:union.ndltd.org:TW/104NCKU5489085 |
| Date | January 2016 |
| Creators | Yen-HsiungChen, 陳彥雄 |
| Contributors | Han-Taw Chen, 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 | 86 |
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