Induced Drag of Wings of Finite Aspect Ratio

descriptionPublicationkeyboard_double_arrow_right Article 01 Feb 1993 English Publisher:American Institute of Aeronautics and Astronautics (AIAA)Journal:AIAA Journal, volume 31, pages 396-398 (issn: 0001-1452, eissn: 1533-385X,

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Authors: Lam, F.;

doi: 10.2514/3.61536

Induced Drag of Wings of Finite Aspect Ratio

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Abstract

The vortex sheet produced at the end of an aeroplane wing during flight rolls up into a vortex attached to the wing. A formula is assumed for the strength of the vorticity, which is substituted into another formula for the vortex drag induced on the wing. It is shown that the induced drag is a minimum when the rolling up of the vortex sheet is completed within a certain finite distance downstream of the wing. The benefit is interpreted in terms of a change in the downward velocity behind the wing.

Related Organizations

University of Cambridge
United Kingdom

Keywords

vortex sheet, attached vortex, vortex drag, Vortex flows for incompressible inviscid fluids, General aerodynamics and subsonic flows

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