Tip vortex locations have been measured in the wake of a model rotor in both axial flow and yaw using quantitative flow visualization. For each setting, the axial force coefficient has been derived, as well, from measurements. The results agree well with those previously published on the Delft University of Technology model rotor. The main interest is to determine the tip vortex pitch, wake skew angle, wake expansion, and to physically interpret the data. The results also help to validate and construct models. The tip vortex location data complement the existing skewed wake velocity data from hot-wire anemometry, making it a valuable experimental database.
Issue Section:
Research Papers
Topics:
Blades,
Flow (Dynamics),
Rotors,
Wake turbulence,
Wakes,
Yaw,
Smoke,
Axial flow,
Flow visualization,
Visualization
1.
Leishman
, J. G.
, 2002, “Challenges in Modelling the Unsteady Aerodynamics of Wind Turbines
,” Wind Energy
1095-4244, 5
(11
), pp. 85
–132
.2.
Vermeer
, L. J.
, Sørensen
, J. N.
, and Crespo
, A.
, 2003, “Wind Turbine Wake Aerodynamics
,” Prog. Aerosp. Sci.
0376-0421, 39
, 467
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, D.
, and Alfredson
, P. H.
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,” Proceedings of the Special Topic Conference: the Science of Making Torque from Wind
, G. A. M.
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, eds., EAWE
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, L. J.
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,” Proceedings of the 12th IEA Symposium on the Aerodynamics of Wind Turbines
, B. M.
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, Lyngby, Denmark 1998, pp. 11
–20
.6.
Grant
, I.
, Mo
, M.
, Pan
, X.
, Parkin
, P.
, Powell
, J.
, Reinecke
, H.
, Shuang
, K.
, Coton
, F.
, and Lee
, D.
, 2000, “An Experimental and Numerical Study of the Vortex Filaments in the Wake of an Operational, Horizontal-Axis, Wind Turbine
,” J. Wind. Eng. Ind. Aerodyn.
0167-6105, 85
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), pp. 177
–189
.7.
Grant
, I.
, Parkin
, P.
, and Wang
, X.
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,” Exp. Fluids
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Grant
, I.
, and Parkin
, P.
, 2000, “A DPIV Study of the Trailing Vortex Elements from the Blades of a Horizontal Axis Wind Turbine in Yaw
,” Exp. Fluids
0723-4864, 28
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), pp. 368
–376
.9.
Vermeer
, L. J.
, 2001, “A Review of Wind Turbine Wake Research at TUDelft
,” AIAA-2001–0030, 20th ASME Wind Energy Symposium, 39th Aerospace Sciences Meeting and Exhibit
, ASME
, Reno, NV.10.
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, J. B.
, Rae
, W. H.
, and Pope
, A.
, 1999, Low Speed Wind Tunnel Testing
, Wiley
, New York, pp. 445
–458
, Chap. 17.11.
Sharpe
, D.
, Jenkins
, N.
, and Burton
, T.
, 2002, Wind Energy Handbook
, Wiley
, New York, pp. 96
–125
, Chap. 3.Copyright © 2005
by American Society of Mechanical Engineers
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