碩士 / 國立成功大學 / 水利及海洋工程學系碩博士班 / 97 / In this study, the experimental observation of Jacket-Type off-shore wind turbine and scouring of the base type suffered from wave and current interaction in the underwater waves is conducted. The primal experiments are controlled on average tide, for the studies of coefficient of drag force, inertia force coefficient, and KC number respectively. And the scouring observation part of monsoon and typhoon conditions and combined current to observe the scouring piles. The lowest water level is used due to the related greatest force for bed.
The wave force measured in the base pressure increases with the wave period, and the measure increases in current state will be larger than that of without current state. The overall trend shows that the force KC = 13 as a watershed. KC <13 the drag coefficient is subject to relatively large impact, and KC> 13 the inertia force coefficient is subject to relatively large impact. The largest force on the base increases with wave steepness and current increased significantly.
The scouring during the monsoon waves conditions is shallow and about 1 ~ 2 times the cylinder diameter. The scouring of typhoon conditions is deeper and significantly expand the scope of the trend around the base to about 3 ~ 4 times the cylinder diameter. With the current state, facing the current side will have a more powerful wave interaction, and scouring depth is also deeper fast. Back of the current side are relatively small because the shelter. The four conditions above the maximum scour depth and pile diameter ratio are coincident in line with the Hotta and Mauri (1976).
| Identifer | oai:union.ndltd.org:TW/097NCKU5083023 |
| Date | January 2009 |
| Creators | Yi-Chun Chen, 陳逸群 |
| Contributors | Hwung-Hweng Hwung, 黃煌煇 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 73 |
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