| 研究課題/領域番号 |
20K14953
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| 研究機関 | 国立研究開発法人宇宙航空研究開発機構 |
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研究代表者 |
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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| 研究期間 (年度) |
2020-04-01 – 2023-03-31
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| キーワード | Transonic buffet control / Global stability / Machine-learning / System identification / Bio-mimetic flow control |
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| 研究実績の概要 |
Global Stability Analysis (GSA) Code Development:
A global stability framework was successfully implemented in JAXA's FaSTAR code. Stability simulations were performed both on: a) unswept/swept wings in the presence of side-walls, and b) full-aircraft configuration. The numerical results compared well with the experiments conducted at JAXA and have been/will be presented at domestic (ANSS/JSAS 2021, ANSS/JSAS 2022) and international conferences (AIAA Scitech 2022, TSFP 2022).
Modeling - System Identification:
A machine-learning based modeling technique was developed by using SINDy (Brunton et al, PNAS 2016) to identify a simple set of equations and predict buffet on 2D supercritical airfoils. While classical numerical approaches take up to hundreds of hours to simulate the buffet dynamics, the identified system can predict it within seconds. This work was presented at international conferences (MMLDT-CSET 2021) and published in a peer-reviewed journal (Sansica et al, AIAA Journal, 2022).
Bio-Mimetic Control of Buffet:
Wavy leading and trailing edges have been tested on unswept and swept wings with spanwise-periodic boundary-conditions. Wavy leading-edges reduce or suppress buffet and the effect of waviness amplitude and wave-length has also been studied.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
After a delayed start because of the COVID19 pandemic, the research is back on track and planned to be completed on time.
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| 今後の研究の推進方策 |
During the current fiscal year, the wavy leading-edge control strategy (that was found to be successful for spanwise-periodic wings) will be tested on finite-wings. Some selected cases with and without wavy-leading edges will be selected to perform global stability analysis and explain the mechanisms that allow the suppression of turbulent transonic buffet.
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| 次年度使用額が生じた理由 |
Part of the budget will be used to outsource some of the planned simulations. Travel and conference fee costs are also expected, since the work will be presented at an international conference in the United States (AIAA Scitech 2023). In order to work on these simulations and present it at the previously mentioned international conference, a personal laptop will also be bought.
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