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TECHNICAL PAPERS

Summary of the Delft University Wind Turbine Dedicated Airfoils

[+] Author and Article Information
W. A. Timmer, R. P. J. O. M. van Rooij

Delft University Wind Energy Research Institute, Faculty of Civil Engineering and Geosciences, Stevinweg 1, 2628 CN Delft, The Netherlands

J. Sol. Energy Eng 125(4), 488-496 (Nov 26, 2003) (9 pages) doi:10.1115/1.1626129 History: Received February 27, 2003; Revised July 07, 2003; Online November 26, 2003
Copyright © 2003 by ASME
Topics: Wind turbines
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References

Tangler, J. L., and Somers, D. M., 1987, “Status of the Special-Purpose Airfoil Families,” Proceedings Conference Windpower ’87, San Francisco, CA, USA.
Björck, A., 1990, “Coordinates and Calculations for the FFA-W1-xxx, FFA-W2-xxx, and FFA-W3-xxx Series of Airfoils for Horizontal Axis Wind Turbines,” Report FFA TN 1990-15, Stockholm, Sweden.
Timmer, W. A., and van Rooij, R., 1996, “DU 94-W-280, a Thick Airfoil With a Divergent Trailing Edge,” Proceedings European Union Wind Energy Conference, Götenborg, Sweden.
Timmer, W. A., and van Rooij, R., 1997, “The Performance of New Wind Turbine Blade Tip and Root Airfoils up to High Angles-of-Attack,” EWEC Dublin, Ireland.
Timmer, W. A., and van Rooij, R., 1999, “Measured Section Performance of Rotating Blades as Input to the Design of Inboard Airfoils,” EWEC Nice, France.
Timmer, W. A., and van Rooij, R., 2001, “Some Aspects of High Angle-of-Attack Flow on Airfoils for Wind Turbine Application,” EWEC Copenhagen, Denmark.
van Rooij, R., “Modification of the Boundary Layer Calculation in RFOIL for Improved Airfoil Stall Prediction,” Report IW-96087R, TU-Delft, the Netherlands.
Bosschers, J., Montgomery, B., Brand, A., and van Rooij, R., 1996, “Influence of Blade Rotation on the Sectional Aerodynamics of Rotational Blades,” 22nd European Rotorcraft Forum, England.
Allen, H. J., and Vincenti, W. G., 1947, “Wall Interference in a Two-Dimensional Wind Tunnel, With Consideration of the Effect of Compressibility,” NACA Report No. 782.
Braslow, A. L., and Knox, E. C., 1958, “Simplified Method for the Determination of Critical Height of Distributed Roughness Particles for Boundary-Layer Transition at Mach Numbers From 0 to 5,” NACA Technical Note 436.
van Rooij, R., and Timmer, W. A., 2003, “Roughness Sensitivity Considerations for Thick Rotor Blade Airfoils,” 41st Aerospace Sciences Meeting, January, Reno, USA Paper no. AIAA-2003-0350.
Giguère, P., Lemay, J., and Dumas, G., 1995, “Gurney Flap Effects and Scaling for Low-Speed Airfoils,” AIAA Paper 95-1881, 13th AIAA Applied Aerodynamics Conference San Diego, June.
Wentz, Jr., W. H., 1975, “Effectiveness of Spoilers on the GA(W)-1 Airfoil With a High-Performance Fowler Flap,” NASA CR-2538, May.
Gault, D. E., 1957, “A Correlation of Low-Speed Airfoil-Section Stalling Characteristics With Reynolds Number and Airfoil Geometry,” NACA Technical Note 3963, Washington, March.

Figures

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A series of DU airfoils for a pitch regulated 55 m diameter rotor
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The predicted DU 91-W2-250 characteristics with two versions of XFOIL and with RFOIL
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The predicted and measured effect of rotation on the pressure distribution of the 30% span section of a rotating blade
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The model of airfoil DU 97-W-300 in the LST test section seen from inside the contraction. The wake rake is in the back.
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Measured pressure distributions for DU 91-W2-25 at R=3×106. Transition free.
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Measured airfoil performance of DU 91-W2-250 at R=3×106
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The airfoil shapes of DU 91-W2-250 and DU 93-W-210
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The effect of Reynolds number on the maximum lift-drag ratio and maximum lift coefficient of airfoil DU 93-W-210
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The effect of a flap deflection on the performance of DU 95-W-180 at R=3×106
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Measured pressure distributions of airfoil DU 96-W-180 at R=3×106. Transition free.
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The effect of zigzag tape at x/c=0.05 on the performance of DU 96-W-180
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Measured pressure distributions for airfoil DU 97-W-300 at R=3×106. Transition free.
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The effect of zigzag tape on the characteristics of DU 97-W-300 at R=3×106
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The measured and calculated performance of DU 97-W-300 at R=3×106
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The RFOIL predicted effect of rotation on DU 97-W-300 in the transition free and fixed condition
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The effect of 1%c and 2%c Gurney flaps on the performance of DU 93-W-210
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Sketch of the Gurney flap and some wedges applied to the trailing edge of DU 93-W-210
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The effect of wedge upstream length on the (l/d)max and Cl,max of DU 93-W-210
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The effect on performance of thickness and location of a trip wire located on the leading edge of DU 93-W-210
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Sketch of the vortex generators used during most wind tunnel tests. Dimensions in mm.
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Effect of vortex generators on the performance of DU 97-W-300 with and without zigzag tape
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The lift curves of two DU airfoils showing leading edge separation
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Correlation of deep-stall angle with leading edge thickness for a number of wind turbine airfoils

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