Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-05T08:05:29.868Z Has data issue: false hasContentIssue false
  • English
  • Français

Dynamic stall vortex convection: thoughts on compressibility effects

Published online by Cambridge University Press:  04 July 2016

R. B. Green  and
R. A. McD. Galbraith
R. B. Green
Affiliation:
Department of Aerospace Engineering, University of GlasgowGlasgow, UK
R. A. McD. Galbraith
Affiliation:
Department of Aerospace Engineering, University of GlasgowGlasgow, UK
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper considers the convection of the dynamic stall vortex. A brief discussion of existing data is given. A comparison of two sets of data from different experimental facilities is then presented, and it is indicated that an important anomaly exists concerning the behaviour of the dynamic stall vortex. It emerges that freestream Mach number is the only parameter that can account for the observed differences. The importance of this parameter is then discussed in the context of vorticity flux from the aerofoil surface.

Type
Research Article
Information
The Aeronautical Journal , Volume 100 , Issue 999 , November 1996 , pp. 367 - 372
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.)

References

1. Ham, N.D. and Garelick, M.S. Dynamic stall considerations in helicopter rotors, J Ameri Heli Soc, 1968, 13, pp 49–55.Google Scholar
2. McCroskey, W.J., Carr, L.W. and McAlister, K.W. Dynamic stall experiments on oscillating airfoils, AIAA J, 1976, 14, pp 57–63.Google Scholar
3. McCroskey, W.J. Unsteady airfoils, Ann Rev Fluid Mech, 1982, 14, pp 285–311.Google Scholar
4. Lorber, P.F. and Carta, F.O. Unsteady stall penetration experiments at high Reynolds number, United Technologies Research Center, USA, Report R87-956939-3, 1987.Google Scholar
5. Ericsson, L.E. and Reding, J.P. Fluid mechanics of dynamic stall part 1. Unsteady flow concepts, J Fluids Struc, 1988, 2, pp 1–33.Google Scholar
6. Doligalski, T.L., Smith, C.R. and Walker, J.D.A. Vortex interactions with walls, Ann Rev Fluid Mech, 1994, 26, pp 573–616.Google Scholar
7. Galbraith, R.A.MCD., Niven, A.J. and Seto, L.Y. On the duration of low-speed dynamic stall, Proceedings of the 15th International Congress of the Aeronautical Sciences, London, UK, 1986.Google Scholar
8. Carta, F.O. Analysis of oscillatory pressure data including dynamic stall effects, NASA CR 2394, 1974.Google Scholar
9. Green, R.B., Galbraith, R.A.McD. and Niven, A.J. Measurements of the dynamic stall vortex convection speed, Aeronaut J, 1992, 96, (958), pp 319–325.Google Scholar
10. Green, R.B. and Galbraith, R.A.McD. A demonstration of the effectof thetestingenvironment on unsteady aerodynamics experiments, Aeronaut J, 1994, 98, (973), pp 83–90.Google Scholar
11. Green, R.B. and Galbraith, R.A.McD. An investigation of dynamic stall through the application of leading edge roughness, Aeronaut J, 1994, 98, (971), pp 17–19.Google Scholar
12. Fung, K.Y. and Carr, L.W. Effects of compressibility on dynamic stall, AIAA J, 1991, 29, pp 306–308.Google Scholar
13. Currier, J.M. and Fung, K.Y. Analysis of the onset of dynamic stall, AIAA J, 1992, 30, pp 2469–2477.Google Scholar
14. Ericsson, L.E. and Reding, J.P. Shock-induced dynamic stall, J Aircr, 1984, 21, pp 316–321.Google Scholar
15. Chandrasekhara, M.S., Ahmed, S. and Carr, L.W. Schlieren studies of compressibility effects on dynamic stall of transiently pitching airfoils, J Aircr, 1993, 30, pp 213–220.Google Scholar
16. Galbraith, R.A.McD., Coton, F.N., Jiang, D. and Gilmour, R. The comparison between the dynamic stall of a finite wing with straight and swept tips, Proceedings of the 20th International Congress of the Aeronautical Sciences, Sorrento, Italy, 1996.Google Scholar
17. Van dommelen, L.L. and Shen, S.F. The spontaneous generation of the singularity in a separating laminar boundary layer, J Comp Phys, 1982, 38, pp 124–140.Google Scholar
18. Shih, C, Lourenco, L.M. and Krothapalli, A. Investigation of flow at leading and trailing edges of pitching-up airfoil, AIAA J, 1995, 33, pp 1369–1376.Google Scholar
19. Acharya, M. and Metwally, M.H. Unsteady pressure field and vorticity production over a pitching airfoil, AIAA J, 1992, 30, pp 403–411.Google Scholar
20. Lin, H. and Vezza, M. A pure vortex method for simulating un steady incompressible separated flows around static and pitching aerofoils,Proceedingsof 20thInternationalCongressof the Aeronautical Sciences, Sorrento, Italy, 1996.Google Scholar