碩士 / 中原大學 / 機械工程研究所 / 96 / This study discusses the influence of several important parameters on the hydrodynamic moment created by the rotating pontoon of a WEMU turbine, where the turbulent flow around pontoon under the double-model assumption is calculated by solving the Reynolds averaged continuity and momentum equations incorporated with the standard k- turbulence model. It is found the resulted hydrodynamic moment due to the rotational motion of pontoon has a power-law dependence on the period of rotation, while the power-law constant approaches to unity provided a sufficiently large incoming flow velocity is present. The numerical results also indicate that the dimensionless moment increases with the decrease of cross-section diameter of pontoon, the decrease of submergence of pontoon, and the increase of incoming speed, and the decrease of Reynolds number. The influence of cross-section shape on the dimensionless moment is not significant, while the triangular series gives the largest moment coefficient and the rectangle series the smallest.
| Identifer | oai:union.ndltd.org:TW/096CYCU5489023 |
| Date | January 2008 |
| Creators | Yu-De Lin, 林育德 |
| Contributors | Shiu-wu Chau, 趙修武 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 84 |
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