Skip to main content Accessibility help

Effect of plunging amplitude on the performance of a wind turbine blade section

  • M. R. Soltani (a1) and F. Rasi Marzabadi (a1)


In many engineering applications (e.g. helicopters, turbines, compressors), lifting surfaces experience unsteady motion or are perturbed by unsteady incoming flows. Horizontal axis wind turbine rotors experience large time dependent variations in angle-of-attack as a result of control input angles, blade flapping, structural response and wake inflow. In addition, the blade sections encounter substantial periodic variations in local velocity and sweep angle. Thus, the unsteady aerodynamic behaviour of the blade sections must be properly understood to enable accurate predictions of the air loads and aero elastic response of the rotor system.



Hide All
1. Leishman, J., Principles of Helicopter Aerodynamics, Cambridge Press, 2000.
2. Huyer, S.A., Simms, D. and Robinson, M.C.. Unsteady aerodynamics associated with a horizontal-axis wind turbine, AIAA J, July (34), 7, 1996, pp 14101419.
3. Robinson, M.C., Galbraith, R.A.McD., Shipley, D. and Miller, M.. Unsteady aerodynamics of wind turbines, Paper 95-0526, 33rd Aerospace Sciences Meeting, Reno, NV, January 1995.
4. Leishman, J.. Challenges in modeling the unsteady aerodynamics of wind turbines, AIAA 2002–0037, 21st ASME Wind Energy Symposium and 40th AIAA Aerospace Sciences Meeting, Reno, NV, January 2002.
5. Ho, Chin-Ming, and Chen, Shin-Hsing, Unsteady wake of a plunging aerofoil, AIAA J, 1980, 11, (19), pp 14921494
6. Hansen, A.C. and Butterfield, C.P.. Aerodynamics of horizontal-axis wind turbines, Annu Rev Fluid Mech 1993.
7. Gormont, R.E.. A mathematical model of unsteady aerodynamics and radial flow for application to helicopter rotors, USAAMRDL, Technical Report 72-67, May 1973.
8. Beddoes, T.S.. A synthesis of unsteady aerodynamic effects including stall hysteresis, Vertica, 1976, (1), pp 113123.
9. Gangwani, S.T.. Synthesized aerofoil data method for prediction of dynamic stall and unsteady airloads, Vertica, 1984, (8), pp 93118.
10. Leiss, U.. A consistent mathematical model to simulate steady and unsteady rotor blade aerodynamics, Proceedings of the 10th European Rotorcraft Forum, Hague, Netherlands, Paper 7, 1984.
11. Carta, F.A.. A comparison of the pitching and plunging response of an oscillating aerofoil, NASA CR-3172, 1979.
12. Ericson, L.E. and Reding, J.P.. Unsteady flow concepts for dynamic stall analysis, AIAA J of Aircr, August 1984, 8, (21), pp 601606.
13. Mcalister, K.W., Carr, L.W. and McCroskey, W.J.. Dynamic stall experiments on the NACA 0012 Aerofoil, NASA TP-1100, January 1978.
14. Ericsson, L.E., and Reding, J.P.. Shock-induced dynamic stall, J of Aircr, May 1984, (21), pp 316321.
15. Carr, L.W.. Progress in analysis and prediction of dynamic stall, AIAA J, 1988, 1, (25), pp. 617.
16. Fukushima, T. and Dadone, L.U.. Comparison of dynamic stall phenomena for pitching and vertical translation motions, NASA CR-2793, July 1977.
17. Tyler, J.C. and Leishman, J.G., An analysis of pitch and plunge effects on unsteady aerofoil behaviour, Presented at the 47th Annual Forum of the American Helicopter Society, May 1991.
18. Soltani, M.R., Rasi, F., Sedighi, M. and Bakhshalipour, A.. An experimental investigation of time lag in pressure-measuring systems, AIAC-2005-028, presented a the 2nd Ankara International Aerospace Conference, Ankara, Turkey, 2225 August, 2005.
19. Horowitz, P. and Hill, W., The Art of Electronics, 2nd Edition, Cambridge University Press, 1989.
20. Barlow, J.B., Rae, W.H. and Pope, A., Low-Speed Wind Tunnel Testing, 3rd Edition, John Wiley & Sons, 1999.
21. Thomas, G.B., Roy, D.M. and John, H.L.V. Mechanical Measurements, Fifth edition, Addison-Wesley Publishing Company, 1993.
22. Soltani, M.R., Rasi Marzabadi, F. and Sedighi, M.. Surface pressure variation on an aerofoil in plunging and pitching motions, ICAS 2006-3.10.1, 25th ICAS Congress, Hamburg, Germany, 38 September 2006.
23. Soltani, M.R. and Rasi Marzabadi, F.. Effect of reduced frequency on the aerodynamic behaviour of an aerofoil oscillating in a plunging motion, Submitted to the Journal of Scientica Iranica, 2006.
24. Theodoresen, T.. General theory of aerodynamic instability and the mechanism of flutter, NACA TR-496, 1935.


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed