2022 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 – 2024-03-31
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| Keywords | bio-mimetic control / shock-oscillations / instability / transonic flows |
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| Outline of Annual Research Achievements |
Transonic buffet is an instability characterized by periodic self-sustained shock-oscillations that occur on aircraft wings at transonic conditions for increasing angles of attack. Controlling and suppressing buffet can have a significant impact in improving the aircraft overall performance and safety. To control buffet, we here proposed wings with wavy leading- and trailing edges, in the attempt to mimic the performance enhancement capabilities of the humpback whale pectoral fins. The effects of wavy leading- and trailing-edges was first tested on periodic (infinitely wide) wings at buffet conditions and it was found that wavy leading-edges are successful in suppressing the instability, while wavy trailing-edges have little or not effect. Wavy leading-edges have therefore been applied to finite wings at buffet conditions and the effect of different characteristic parameters (i.e. waviness amplitude and wavelength, waviness spanwise starting location) has been investigated. Wavy leading-edges on finite wings seem to be less effective in suppressing buffet, but the amplitude of the shock-oscillations is anyway reduced.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
Due to the appointment of the PI to a new internal position with management tasks, some slight delayed occurred. However, the project is expected to terminate on time by the end of FY23.
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| Strategy for Future Research Activity |
Additional simulations to test different characteristic parameters are planned to determine whether further improvements in the wavy leading-edge buffet control capabilities can be obtained.
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| Causes of Carryover |
The remaining budget will be used in FY23 for a conference participation to present work related to the global stability framework developed during the current project.
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