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The Effect of Base Bleed on a Periodic Wake

Published online by Cambridge University Press:  04 July 2016

C. J. Wood
C. J. Wood*
Affiliation:
Department of Engineering Science, University of Oxford
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Summary:—

Measurements of profile drag, base pressure, wake turbulence and vortex shedding frequency have been made on a 9 per cent thick aerofoil in the presence of a secondary air flow, ejected from the blunt trailing edge. It is shown that the decrease in profile drag caused by the base bleed is associated with a decrease in the strength of the vortex street. The initial formation of the vortices occurs further downstream as the bleed quantity is increased. As a result, a greater proportion of the shed vorticity is diffused before the street is formed.

Type
Technical notes
Information
The Aeronautical Journal , Volume 68 , Issue 643 , July 1964 , pp. 477 - 482
Copyright
Copyright © Royal Aeronautical Society 1964

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