Comptes Rendus
Biomimetic spiroid winglets for lift and drag control
Comptes Rendus. Mécanique, Volume 340 (2012) no. 1-2, pp. 67-80.

In aeronautical engineering, drag reduction constitutes a challenge and there is room for improvement and innovative developments. The drag breakdown of a typical transport aircraft shows that the lift-induced drag can amount to as much as 40% of the total drag at cruise conditions and 80–90% of the total drag in take-off configuration. One way of reducing lift-induced drag is by using wingtip devices. By applying biomimetic abstraction of the principle behind a birdʼs wingtip feathers, we study spiroid wingtips, which look like an extended blended wingtip that bends upward by 360 degrees to form a large rigid ribbon. The numerical investigation of such a wingtip device is described and preliminary indications of its aerodynamic performance are provided.

Published online:
DOI: 10.1016/j.crme.2011.11.007
Keywords: Computational fluid mechanics, Spiroid winglets, Lift-induced drag, Drag reduction, Biomimetics

Joel E. Guerrero 1; Dario Maestro 1; Alessandro Bottaro 1

1 University of Genoa, Department of Civil, Environmental and Architectural Engineering, DICAT, Via Montallegro 1, 16145 Genoa, Italy
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Joel E. Guerrero; Dario Maestro; Alessandro Bottaro. Biomimetic spiroid winglets for lift and drag control. Comptes Rendus. Mécanique, Volume 340 (2012) no. 1-2, pp. 67-80. doi : 10.1016/j.crme.2011.11.007.

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