碩士 / 國立成功大學 / 機械工程學系 / 104 / In this article, the Laplace Adomian decomposition method (LADM) is used to solve the heat transfer and thermal stress analyses in variable profile annular fin. The heat transfer problem including the parameters of temperature-dependent conduction and convection, and the constant radiation coefficient, with the periodic temperature as boundary condition as well. Solving the temperature distribution in annular fin, and find out the saturated vapor pressure which is under the temperature meantime, to solve the thermal stress distribution, including the radial stress and the tangential stress. Investigating the effect of temperature distribution and thermal stress distribution by both heat transfer parameters and the diversification of fin profile and fin efficiency distribution with every heat transfer parameter.
The results show that temperature distribution lower by the lower conductivity, the higher convection coefficient, radiation coefficient and decline rate of fin thickness. But change any heat transfer coefficient and the fin profile would not change the thermal stress distribution. In the high temperature heat transfer process, there have obviously impact on having the radiation coefficient. Improve the radiation coefficient can dissipate heat quickly, make the fin cooling down.
| Identifer | oai:union.ndltd.org:TW/104NCKU5489047 |
| Date | January 2016 |
| Creators | Yu-TingChen, 陳郁婷 |
| Contributors | Chao-Guang Chen, 陳朝光 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 130 |
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