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Aerospace 2018, 5(3), 76; https://doi.org/10.3390/aerospace5030076

A Hybrid Reduced-Order Model for the Aeroelastic Analysis of Flexible Subsonic Wings—A Parametric Assessment

1
School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK
2
Department of Bioengineering and Aerospace Engineering, Universidad Carlos III de Madrid, 28911 Leganés (Madrid), Spain
*
Author to whom correspondence should be addressed.
Received: 30 April 2018 / Revised: 25 June 2018 / Accepted: 9 July 2018 / Published: 17 July 2018
(This article belongs to the Special Issue Computational Aerodynamic Modeling of Aerospace Vehicles)
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Abstract

A hybrid reduced-order model for the aeroelastic analysis of flexible subsonic wings with arbitrary planform is presented within a generalised quasi-analytical formulation, where a slender beam is considered as the linear structural dynamics model. A modified strip theory is proposed for modelling the unsteady aerodynamics of the wing in incompressible flow, where thin aerofoil theory is corrected by a higher-fidelity model in order to account for three-dimensional effects on both distribution and deficiency of the sectional air load. Given a unit angle of attack, approximate expressions for the lift decay and build-up are then adopted within a linear framework, where the two effects are separately calculated and later combined. Finally, a modal approach is employed to write the generalised equations of motion in state-space form. Numerical results were obtained and critically discussed for the aeroelastic stability analysis of a uniform rectangular wing, with respect to the relevant aerodynamic and structural parameters. The proposed hybrid model provides sound theoretical insights and is well suited as an efficient parametric reduced-order aeroelastic tool for the preliminary multidisciplinary design and optimisation of flexible wings in the subsonic regime. View Full-Text
Keywords: hybrid reduced-order model; quasi-analytical; aeroelasticity; flexible wings; subsonic hybrid reduced-order model; quasi-analytical; aeroelasticity; flexible wings; subsonic
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Berci, M.; Cavallaro, R. A Hybrid Reduced-Order Model for the Aeroelastic Analysis of Flexible Subsonic Wings—A Parametric Assessment. Aerospace 2018, 5, 76.

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