| Project/Area Number |
20K14953
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 24010:Aerospace engineering-related
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| Research Institution | Japan Aerospace EXploration Agency |
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Principal Investigator |
Andrea Sansica 国立研究開発法人宇宙航空研究開発機構, 航空技術部門, 研究開発員 (80867797)
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| Project Period (FY) |
2020-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | Transonic buffet / Shock-oscillations / Bio-mimetic control / Instability / bio-mimetic control / shock-oscillations / instability / transonic flows / Transonic buffet control / Global stability / Machine-learning / System identification / Bio-mimetic flow control / Buffet onset prediction / Buffet control / Transonic Buffet / Control / Bio-mimetic / Global Stability / Machine Learning |
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| Outline of Research at the Start |
Transonic buffet consists of shock-wave oscillations that occur on aircraft wings and cause dangerous structural vibrations. By mimicking the humpback whale wavy fins, this research investigates the effectiveness of new wing configurations to suppress buffet and enhance flight quality and safety.
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| Outline of Annual Research Achievements |
Under certain combinations of speed and incidence, commercial aircraft can experience transonic buffet. Buffet consists of periodic self-sustain loads which cause wing vibrations, consequently reducing the aircraft performance, maneuverability and safety. The objective of this work is to apply bio-mimetic wings characterized by wavy leading- and trailing edges to control buffet. To further investigate the mechanisms of buffet, a numerical method based on global stability has been validated against high-fidelity simulations and applied to full-aircraft configurations. Different characteristics of wavy leading- and trailing-edges have been studied for both periodic and finite wings. When wavy leading-edges were used, transonic buffet was weakened and the related unsteady loads reduced.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
Some delay occurred due to appointment of the PI to many managerial tasks. The project is however expected to be completed by the end of FY24.
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| Strategy for Future Research Activity |
Some additional simulations for finite wings will be performed to further characterize the control and weakening of transonic buffet.
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