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A study of the active aeroelastic wing concept for a delta wing aircraft

Das, S and Padmanabhan, MA and Venkatraman, K (2021) A study of the active aeroelastic wing concept for a delta wing aircraft. In: AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021, 11-15 Jan 2021, Virtual, Online, pp. 1-20.

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This computational aeroelastic study investigates the suitability of the Active Aeroelastic Wing (AAW) concept to improve the roll performance of an existing highly swept, low aspect ratio delta wing aircraft. Prior AAW technology studies have examined wings with milder or no sweep and larger aspect ratios. In AAW, the leading-edge (LE) surface is meant to compensate for the adverse aeroelastic twist of the wing caused by trailing-edge (TE) surface deflection during rolling, thereby increasing roll efficiency and postponing control reversal. In the present work, a simplified rectangular wing from literature is first subjected to trim optimization to demonstrate the improvement that AAW can provide in principle. Optimal �gear ratios� of LE-to-TE-deflections required for steady roll are computed while minimizing various objective functions including control surface deflection, hinge moment and control effort. Subsequently, a delta wing aircraft is analyzed after replacing the existing sliding LE slats in the computational model with rotating flaps. The structure and the aerodynamics are respectively modeled using finite element and doublet lattice methods. The results show that the LE flaps have a low effectiveness in roll as compared to the TE surfaces. Additionally, the results do not significantly improve when the LE flap area is increased or the wing stiffness is decreased. Thus, AAW does not appear to be very encouraging for the delta wing considered here, perhaps due to its high sweep and/or low aspect ratio. It is planned to confirm these findings in the future using CFD based high fidelity simulations to include the nonlinear aspects of delta wing aeroelasticity. © 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Item Type: Conference Paper
Publication: AIAA Scitech 2021 Forum
Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information: The copyright of this article belongs to American Institute of Aeronautics and Astronautics Inc, AIAA
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 25 Feb 2021 05:52
Last Modified: 25 Feb 2021 05:52
URI: http://eprints.iisc.ac.in/id/eprint/68022

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