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Measurements of the dynamic stall vortex convection speed

Part of: 75 year anniversary of Aeronautical Engineering at Glasgow University

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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References

1. Mccroskey, W.J., Carr, L.W. and Mcalister, K.W. Dynamic stall experiments on oscillating aerofoils, AIAA J, 1976, 14, 57.Google Scholar
2. Carta, F.O. Analysis of oscillatory pressure data including dynamic stall effects, NASA CR 2394, 1974.Google Scholar
3. ST. Hilaire, A.O. and CARTA, F.O. Analysis of Unswept and Swept Wing Pressure Data From an Oscillating NACA 0012 Airfoil Experiment. Volume 1 -Technical Report, NASA CR 3567, 1983.Google Scholar
4. Robinson, M.C and Luttges, M.W. Unsteady flow separation and attachment induced by pitching aerofoils, AIAA-83-0131, 1983.Google Scholar
5. Lorber, P.F. and Carta, F.O. Unsteady Stall Penetration Experiments at High Reynolds Number, AFOSR TR-87-1202, UTRC R87- 956939-3, 1987.Google Scholar
6. Jumper, E.J., Shreck, S.J. and Dimmick, R.L. Lift-curve characteristics for an aerofoil pitching at constant rate, AIAA-86-0117, 1986.Google Scholar
7. Chandrasekhara, M. and Carr, L.W. Flow visualisation studies of the mach number effects on the dynamic stall of an aerofoil, AIAA- 89-0023, 1989.Google Scholar
8. Tuncer, I.H., Wu, J.C., and Wang, CM. Theoretical and numerical studies of oscillating aerofoils, AIAA J, 1990, 28, 1615.Google Scholar
9. Galbraith, R.A.McD., Niven, A.J. and Seto, L.Y. On the duration of low speed dynamic stall, Proceedings of the 15th ICAS Conference, London, 1986.Google Scholar
10. Mccroskey, W.J., Mcalister, K.W., Carr, L.W., and Pucci, S.L., An advanced study of dynamic stall on advanced airfoil sections, NASA TM-84245, vol 1,2,3, 1982.Google Scholar
11. Green, R.B., Galbraith, R.A.McD. and Niven, A.J. Measurements of the dynamic stall vortex convection speed, AFOSR Contract No 89-0397 A, University of Glasgow, Dept Aerospace Engineering, Report No 9014, 1990.Google Scholar
12. Green, R.B., Galbraith, R.A.McD. and Niven, A.J. The Dynamic Stall Vortex Convection Speed Anomaly: Analysis of Lorber & Carta's Pressure Data, AFOSR Contract N° 89-0397 A, University of Glasgow, Dept Aerospace Engineering, Report N° 9101, 1991.Google Scholar
13. Robinson, M.C, Helin, H.E. and Luttges, M.W. Control of wake structure behind an oscillating airfoil, AIAA-86-2282-CP, 1986.Google Scholar
14. Lorber, P.F. and Carta, F.O. Private communication, 1991.Google Scholar