2021 Fiscal Year Research-status Report
Three-Dimensional Global Stability Analysis and Bio-Mimetic Control of Buffet Phenomena via Wings with Wavy Leading and Trailing Edges
| Project/Area Number |
20K14953
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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 – 2023-03-31
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| Keywords | Transonic buffet control / Global stability / Machine-learning / System identification / Bio-mimetic flow control |
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| Outline of Annual Research Achievements |
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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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
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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| Strategy for Future Research Activity |
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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| Causes of Carryover |
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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