Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-25T06:46:13.979Z Has data issue: false hasContentIssue false
  • English
  • Français

A correlation indicating incipient dynamic stall

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
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper proposes a correlation which attempts to relate an aerofoil's low speed dynamic stall onset incidence to particular parameters describing its stall behaviour in steady conditions. These parameters, which can be derived from experiment or predictive algorithm, are the incidence of steady stall and a term related to trailing-edge separation characteristics. The correlation is based on a large amount of data obtained from a number of aerofoils broadly classified into two families: the NACA four digit series of symmetrical sections and a family of four profiles with the NACA 23012 as the generic shape.

The correlation has been extended to low pitch rates outside the “deep” dynamic stall range and, whilst it pertains to stalling under ramp motions, a link has been established with oscillatory motions. The potential of the correlation is demonstrated by its application to the design of a symmetric aerofoil for use on wind turbines.

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

+

Currently with Westland Helicopters, Yeovil, Somerset

†

Currently Lecturer, The University of Paisley, Scotland

References

1. Carr, L.W., Mcalister, K.W. and Mccroskey, W.J. Analysis of the development of dynamic stall based on oscillating aerofoil experiments, NASA TND 8382, 1977.Google Scholar
2. Mccroskey, W.J., Mcalister, K.W., Carr, L.W., Pucci, S.L., Lambert, O. and Indergrand, R.F. Dynamic stall on advanced airfoil sections, J Am Heli Soc, 1981, 13, (1).Google Scholar
3. Mccroskey, W.J., Carr, L.W. and Mcauster, K.W. Dynamic stall experiments on oscillating airfoils, AIAA J, 1976 14, (1).Google Scholar
4. Young, W.H. Fluid mechanics mechanisms in the stall process for helicopters, NASA TM 81956, 1984.Google Scholar
5. Gracey, M.W. The design and low Mach number wind-tunnel per formance of a modified NACA 23012 aerofoil, with an investigation of dynamic stall onset, Ph D Dissertation, Glasgow University Aero Rpt9108, 1991.Google Scholar
6. Seto, L.Y. Galbraith, R.A.MCD The effect of pitch rate on the dy namic stall of a NACA 23012 aerofoil, 1 1th European Rotorcraft Fo rum, London, 1985.Google Scholar
7. Galbraith, R.A.Mcd., Gracey, M.W. Leitch, E. Summary of pres sure data for thirteen aerofoils on the University of Glasgow's aero foil database, Glasgow University Aero Rpt 9221, 1992.Google Scholar
8. Gracey, M.W., Niven, A.J. and Galbraith, R.A.Mcd. A consider ation of low-speed dynamic stall onset, 15th European Rotorcraft Forum, Amsterdam, 1989.Google Scholar
9. Seto, L.Y. An experimental investigation of low speed dynamic stall and reattachment of the NACA 23012 aerofoil under constant pitch motion, Glasgow University Aero Rpt 8829.Google Scholar
10. Carta, F.O. Analysis of oscillatory pressure data including dynamic stall effects, NASA CR 2394, 1974.Google Scholar
11. Scruggs, L. Y., Nash, J.F. and Singleton, R.E. Analysis of dynamic stall using unsteady boundary layer theory, NASA CR 2462, 1974.Google Scholar
12. Mcalister, K.W. and Carr, L.W., Dynamic stall experiments on the NACA 0012 airfoil, NASA TP 1100, 1978.Google Scholar
13. Niven, A.J. An experimental investigation into the influence of trail ing edge separation on an aerofoil's dynamic stall performance, Glasgow University Aero Rpt 1991, 9107.Google Scholar
14. Beddoes, T.S. Representation of airfoil behaviour, Vertica, 1983 7, (2).Google Scholar
15. Angell, R.K., Musgrove, P.J., Galbraith, R.A.MCD., and Green, R.B., Summary of the collected data for tests on the NACA 0015, NACA 0018, NACA 0021, NACA 0025 and NACA 0030, Glasgow University Aero Rpt 9005, 1990.Google Scholar
16. Galbraith, R.A.MCD., Niven, A.J. and Coton, F.N. Unsteady aero dynamics and its relevance to wind turbines, Wind Eng, 1991 14, (5).Google Scholar
17. Coton, F.N., Galbraith, R.A.McD.and Jiang, D. The influence of detailed blade design on the aerodynamic performance of straight bladed vertical axis wind turbines, Journal of Power and Energy, 1996 210, pp. 65—74 Google Scholar
18. Galbraith, R.A.Mcd., Coton, F.N. and Jiang, D. The aerodynamic design of vertical axis wind turbines, Glasgow University Aero Rpt 9246.Google Scholar
19. Coton, F.N. and Galbraith, R.A.Mcd. A two-dimensional incom pressible aerofoil design package for V.A.W.T. applications, final report for contract AEA/E/5A/CON/5102/1756, Glasgow University Aero Rpt 8904, Sept., 1989.Google Scholar
20. Coton, F.N. and Galbraith, R.A.Mcd. A direct viscid-inviscid interaction scheme for the prediction of two-dimensional aerofoil lift and pitching moment in incompressible flow, Aeronaut 7, 1989, 93, (924).Google Scholar