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Some Remarks on Vortex Drag and its Spanwise Distribution in Incompressible Flow

Published online by Cambridge University Press:  04 July 2016

H. C. Garner
H. C. Garner*
Affiliation:
Aerodynamics Division, National Physical Laboratory
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Summary

Theoretical data from lifting-surface theory are presented to illustrate

  • (i) that the vortex drag factor is closely related to the half-wing spanwise centre of pressure on simple planforms without camber or twist,

  • (ii) that lifting-line theory is useless for predicting the spanwise distribution of vortex drag on swept wings,

  • (iii) that recent numerical improvements in lifting-surface theory help to reconcile the concepts of wake energy and leading-edge suction in relation to vortex drag.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 72 , Issue 691 , July 1968 , pp. 623 - 625
Copyright
Copyright © Royal Aeronautical Society 1968 

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References

1. Multhopp, H. Die Berechnung der Auftriebsverteilung von Tragflügeln. Luftfahrtforschung, pp 153-169; Translation in ARC Report 8516, 1938.Google Scholar
2. Multhopp, H. Methods for Calculating the Lift Distribution of Wings (Subsonic Lifting-Surface Theory). ARC R and M 2884, 1950.Google Scholar
3. Heaslet, M. A. and Lomax, H. Supersonic and Transonic Small Perturbation Theory. High Speed Aerodynamics and Jet Propulsion, Vol 6, General Theory of High Speed Aerodynamics, Section D, 14 (Ed. W. R., Sears). Oxford University Press, 1955.Google Scholar
4. Garner, H. C. and Fox, D. A. Algol 60 Programme for Multhopp’s Low-Frequency Subsonic Lifting-Surface Theory. ARC R and M 3517, 1966.Google Scholar