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Aerospace 2018, 5(4), 126; https://doi.org/10.3390/aerospace5040126

CFD Study of the Impact of Variable Cant Angle Winglets on Total Drag Reduction

DICCA, Università degli Studi di Genova, Via Montallegro 1, 16145 Genova, Italy
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Received: 24 September 2018 / Revised: 24 November 2018 / Accepted: 26 November 2018 / Published: 3 December 2018
(This article belongs to the Special Issue Bio-Inspired Aerospace System)
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Abstract

Winglets are commonly used drag-reduction and fuel-saving technologies in today’s aviation. The primary purpose of the winglets is to reduce the lift-induced drag, therefore improving fuel efficiency and aircraft performance. Traditional winglets are designed as fixed devices attached at the tips of the wings. However, because they are fixed surfaces, they give their best lift-induced drag reduction at a single design point. In this work, we propose the use of variable cant angle winglets which could potentially allow aircraft to get the best all-around performance (in terms of lift-induced drag reduction), at different angle-of-attack values. By using computational fluid dynamics, we study the influence of the winglet cant angle and sweep angle in the performance of a benchmark wing at a Mach number of 0.8395. The results obtained demonstrate that by carefully adjusting the cant angle, the aerodynamic performance can be improved at different angles of attack. View Full-Text
Keywords: lift-induced drag; winglet; variable cant angle; CFD lift-induced drag; winglet; variable cant angle; CFD
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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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Guerrero, J.; Sanguineti, M.; Wittkowski, K. CFD Study of the Impact of Variable Cant Angle Winglets on Total Drag Reduction. Aerospace 2018, 5, 126.

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