碩士 / 國立高雄海洋科技大學 / 輪機工程研究所 / 101 / The laminar velocity distribution in an internal finned tube is investigated numerically. Giving specified frontal area of flow, the velocity as well as friction factor is obtained for different fin number, fin length and fin thickness. This study starts with non-dimensionalizing the governing equations of steady-state, fully developed laminar flow. To solve the difficult boundary value problem, the cross-section of flow was divided into upper and lower subdivisions. In the adjacent region of the two subdivisions, principle of continuity of velocity is employed to solve the temperature profile by finite difference method with successive over-relaxation. The effects of fin numbers of 4, 6, 8, 12, 14 and 16 and dimensionless fin length of 0.1, 0.3, 0.5, 0.7 and 0.9 on flow velocity are studied. The results show that the friction factor has a significant raise as fin number or fin length increases whereas the friction factor decreases for a larger Reynolds number. In addition, velocity distributions in the internally finned tube are presented for various conditions.
| Identifer | oai:union.ndltd.org:TW/101NKIM0484016 |
| Date | January 2013 |
| Creators | Li Kuan Yu, 李冠萭 |
| Contributors | Yeh Rong Hua, 葉榮華 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 69 |
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