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On bio-inspired induced drag reduction techniques

Ayvazian, Aram and Cuenca Alcocel, Ignacio and Gowree, Erwin Ricky On bio-inspired induced drag reduction techniques. (2022) In: 56th 3AF International Conference on Applied Aerodynamics, 28 March 2022 - 30 March 2022 (Toulouse, France).

(Document in English)

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The current study was aimed at identifying wing planform geometries which favours low induced drag. The geometries were defined by mathematical functions and following a subsequent parametric study, with a focus on sweep angle and taper ratio, inspired by birds wings and aquatic animals flukes or caudal fins planforms. The parametric studies were carried out using a vortex lattice method (VLM) which was validated with experimental data from literature. The main finding is a confirmation of the fact that the maximum Oswald efficiency factor, e is not exclusive to an elliptical wing planform. Despite its apparent simplicity, in fact a swept-back-tapered wing with a linear chord distribution can reach e = 1, the limit or minimum induced drag established from elliptical lift distribution. Moreover, the crescent wing geometry, such as the one displayed by the swift, can even surpass this limit.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-03654435
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Laboratory name:
Deposited On:28 Apr 2022 13:02

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