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A correlation indicating incipient dynamicstall

Published online by Cambridge University Press:  04 July 2016

M. W. Gracey ,
A. J. Niven ,
F. N. Coton ,
R. A. McD. Galbraith  and
D. Jiang
M. W. Gracey
Affiliation:
Department of Aerospace Engineering, University of GlasgowGlasgow, UK
A. J. Niven
Affiliation:
Department of Aerospace Engineering, University of GlasgowGlasgow, UK
F. N. Coton
Affiliation:
Department of Aerospace Engineering, University of GlasgowGlasgow, UK
R. A. McD. Galbraith
Affiliation:
Department of Aerospace Engineering, University of GlasgowGlasgow, UK
D. Jiang
Affiliation:
Department of Aerospace Engineering, University of GlasgowGlasgow, UK
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Abstract

This paper proposes a correlation which attempts torelate an aerofoil's low speed dynamic stall onsetincidence to particular parameters describing itsstall behaviour in steady conditions. Theseparameters, which can be derived from experiment orpredictive algorithm, are the incidence of steadystall and a term related to trailing-edge separationcharacteristics. The correlation is based on a largeamount of data obtained from a number of aerofoilsbroadly classified into two families: the NACA fourdigit series of symmetrical sections and a family offour profiles with the NACA 23012 as the genericshape.

The correlation has been extended to low pitch ratesoutside the “deep” dynamic stall range and, whilstit pertains to stalling under ramp motions, a linkhas been established with oscillatory motions. Thepotential of the correlation is demonstrated by itsapplication to the design of a symmetric aerofoilfor use on wind turbines.

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 100 , Issue 997 , September 1996 , pp. 305 - 311
Copyright
Copyright © Royal Aeronautical Society 1996 

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Footnotes

+

Currently with Westland Helicopters, Yeovil,Somerset

†

Currently Lecturer, The University of Paisley,Scotland

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