Numerical Investigation into Flutter and Flutter-Buffet Phenomena for a Swept Wing and a Curved Planform Wing

The results of numerical studies carried out on high-aspect-ratio wings with different planforms are discussed: the transonic regime is analysed for a swept wing and a curved planform wing. The wings have similar aspect ratios and similar aerodynamic profiles. The analyses were carried out by CFD an...

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Bibliographic Details
Published in:International journal of aerospace engineering 2019-01, Vol.2019 (2019), p.1-19
Main Authors: Chiarelli, Mario Rosario, Bonomo, Salvatore
Format: Article
Language:English
Subjects:
Aeroelastic stability
Aeroelasticity
Aerospace engineering
Aircraft
Drag reduction
Efficiency
Flight conditions
Fluids
Flutter
High aspect ratio
Planforms
Sensitivity analysis
Simulation
Swept wings
Transonic flight
Vibration
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Summary:The results of numerical studies carried out on high-aspect-ratio wings with different planforms are discussed: the transonic regime is analysed for a swept wing and a curved planform wing. The wings have similar aspect ratios and similar aerodynamic profiles. The analyses were carried out by CFD and FE techniques, and the reliability of the numerical aerodynamic results was proven by a sensitivity study. Analysing the performances of the two wings demonstrated that in transonic flight conditions, a noticeable drag reduction can be obtained by adopting a curved planform wing. In addition, for such a wing, the aeroelastic instability condition, consisting in a classical flutter, is postponed compared to a conventional swept wing, for which a flutter-buffet instability occurs. In a preliminary manner, the study shows that, for a curved planform wing, the high speed buffet is not an issue and at the same time notable fuel saving can be achieved.
ISSN:1687-5966
1687-5974
DOI:10.1155/2019/8210235