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Measurements of the dynamic stall vortex convection speed

Published online by Cambridge University Press:  04 July 2016

R. B. Green ,
R. A. McD. Galbraith  and
A.J. Niven
R. B. Green
Affiliation:
Department of Aerospace Engineering, University of Glasgow, Scotland
R. A. McD. Galbraith
Affiliation:
Department of Aerospace Engineering, University of Glasgow, Scotland
A.J. Niven
Affiliation:
Department of Aerospace Engineering, University of Glasgow, Scotland
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Abstract

This paper considers the dynamic stall vortex of importance in helicopter rotor aerodynamics and discusses previous measurements of its convection speed. It emerges that an anomaly exists between the available data sets, i.e. that some workers find that the convection speed is dependent upon the aerofoil motion, while others find that this is not the case. Measurements of the convection speed from data gathered at Glasgow University for a variety of aerofoil shapes and motion types are then presented, which support the conclusion that the dynamic stall vortex convection speed is independent of aerofoil type and motion type to a first order.

Type
Research Article
Information
The Aeronautical Journal , Volume 96 , Issue 958 , October 1992 , pp. 319 - 325
Copyright
Copyright © Royal Aeronautical Society 1992 

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