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Prediction of drag and lift using velocity and vorticity fields

Published online by Cambridge University Press:  04 July 2016

G. Zhu ,
P. W. Bearman  and
J. M. R. Graham
G. Zhu
Affiliation:
Department of Aeronautics, Imperial College, London, UK
P. W. Bearman
Affiliation:
Department of Aeronautics, Imperial College, London, UK
J. M. R. Graham
Affiliation:
Department of Aeronautics, Imperial College, London, UK
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Abstract

Closed-form equations for the evaluation of forces on a body in compressible, inviscid and viscous flows are presented. The expressions which are used to calculate lift and drag require only knowledge of the velocity field (and its derivatives) on an arbitrarily chosen contour enclosing the body. Various forms of the force equations are presented, both for two-dimensional and three-dimensional flows. The work is an extension of earlier research by Noca) developed for incompressible flows. The equations are implemented on a number of two-dimensional aerofoil cases and the results show excellent agreement with surface and wake integration approaches.

Type
Research Article
Information
The Aeronautical Journal , Volume 106 , Issue 1064 , October 2002 , pp. 547 - 554
Copyright
Copyright © Royal Aeronautical Society 2002 

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