Biomimetic spiroid winglets for lift and drag control - 23/01/12
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Abstract |
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.
Le texte complet de cet article est disponible en PDF.Keywords : Computational fluid mechanics, Spiroid winglets, Lift-induced drag, Drag reduction, Biomimetics
Plan
Vol 340 - N° 1-2
P. 67-80 - janvier 2012 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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