| Project/Area Number |
18F18355
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 外国 |
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| Review Section |
Basic Section 24020:Marine engineering-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
トレンティンゴンカルヴス ロドルフォ (2020) 東京大学, 大学院工学系研究科(工学部), 助教 (70822675)
鈴木 英之 (2018-2019) 東京大学, 大学院工学系研究科(工学部), 教授 (00196859)
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| Co-Investigator(Kenkyū-buntansha) |
TRENTIN GONCALVE RODOLFO 東京大学, 工学(系)研究科(研究院), 外国人特別研究員
TRENTIN GONCALVES RODOLFO 東京大学, 大学院工学系研究科, 外国人特別研究員
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| Project Period (FY) |
2018-11-09 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2020: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2019: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2018: ¥100,000 (Direct Cost: ¥100,000)
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| Keywords | flow-induced motions / vortex-induced motions / galloping / FOWT / multi-column platforms / model tests / 浮体式洋上風車 / 渦励起運動 / Vortex Induced Motion / コラム / ポンツーン |
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| Outline of Annual Research Achievements |
FIM (flow-induced motions) phenomenon was investigated experimentally around multi-column FOWT (floating offshore wind turbines). Different geometries were studied as spacing ratio and column section shape.
The results showed the best configurations to avoid the low frequency and high amplitudes of the motions due to the flow around the system. Two main mechanisms were observed: VIM (vortex-induced motions) due to the vortex shedding and resonance; and galloping due to the instability phenomenon caused by the asymmetric incidence of the flow.
From these results, it is possible to propose the best geometry regarding the FIM amplitudes and also investigate new suppression devices to mitigate the FIM.
The experimental results were compared with CFD calculations. The comparison showed a good agreement between them. Therefore, it is possible to conclude that the CFD can be a useful tool for designing procedure.
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| Research Progress Status |
令和2年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和2年度が最終年度であるため、記入しない。
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