2023 Fiscal Year Final Research Report
Study on the mechanism of hydrodynamic force generation by flapping motion of a wing with leading edge protuberance imitating the pectoral fin of a humpback whale
| Project/Area Number |
20K04289
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | The University of Shiga Prefecture |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
南川 久人 滋賀県立大学, 工学部, 教授 (60190691)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 前縁波形状翼 / 非定常流体力 / フラッピング運動 / ピッチング運動 / ヒービング運動 / NACA0012 |
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| Outline of Final Research Achievements |
In this study, we focused on the fluid dynamic force characteristics on a moving wing with leading edge protuberance that imitates the pectoral fins of a humpback whale, and conducted an investigation to clarify the mechanism by which unsteady fluid dynamic forces are generated.
An experimental device capable of realizing heaving, pitching, and flapping motions was constructed, and the wing performance and flow fields of a wing with leading edge protuberance and a wing with straight leading edge were investigated. As a result, it was found that in the case of a wing with straight leading edge, separation is suppressed by the wing motion, and a higher lift can be obtained than a static wing. Furthermore, since a wing with leading edge protuberance can generate a stable high lift under any motion conditions, it was found to be highly suitable for a fish-type underwater robot.
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| Free Research Field |
流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
従来の前縁波形状翼に関する研究は固定した翼を対象にしており，羽ばたき運動する前縁波形状翼を取り扱った研究は無い．そのため，本研究で明らかにした前縁波形状翼の運動時の流体力特性や非定常揚力発生メカニズムは新たな重要な知見である．また，前縁波形状翼がどの運動条件においても変動が少なく，かつ，高い揚力を出せることを示した結果は，効率的な魚型水中調査機器の開発の一助となることが期待できる．
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