Wind tunnel flutter tests of a strut-braced high aspect ratio wing

Wind tunnel flutter tests of a strut-braced high aspect ratio wing

Luca Marchetti, Stephan Adden, Michael Meheut, Sergio Ricci

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Abstract. Increasing the wing aspect ratio is one way to improve aircraft aerodynamic efficiency. This reduces the induced drag term but, at the same time, produces an increment of the wing loads, hence an increase of the structural weight. One design solution to reduce the wing root bending moment, which is the main driver of the weight of the wing, is the addition of a strut. This work deals with the experimental identification of the flutter behavior of an ultra-high aspect ratio (19) strut-braced wing in a wind tunnel. The inherent non-linear behavior of such a structure that has two different effects on the wing when loaded in compression and in tension is coupled with large deformations due to its extreme flexibility. From here derives the extreme importance of experimental tests to understand how different parameters of such a design can impact its aeroelastic behavior.

Strut-Braced Wing, High Aspect Ratio Wing, Nonlinear Aeroelasticity, Flutter

Published online 11/1/2023, 4 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Luca Marchetti, Stephan Adden, Michael Meheut, Sergio Ricci, Wind tunnel flutter tests of a strut-braced high aspect ratio wing, Materials Research Proceedings, Vol. 37, pp 34-37, 2023


The article was published as article 8 of the book Aeronautics and Astronautics

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[1] CARRIER, Gerald G., et al. Multidisciplinary analysis and design of strut-braced wing concept for medium range aircraft. In: AIAA SCITECH 2022 Forum. 2022. p. 0726.
[2] Delavenne, M., et al. “Multi-fidelity weight analyses for high aspect ratio strut-braced wings preliminary design.” IOP Conference Series: Materials Science and Engineering. Vol. 1226. No. 1. IOP Publishing, 2022.
[3] ALLEN, Matthew S.; MAYES, Randall L. Estimating the degree of nonlinearity in transient responses with zeroed early-time fast Fourier transforms. Mechanical Systems and Signal Processing, 2010, 24.7: 2049-2064.