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Article

Surface Pressure Distribution on a Blade of a 10 m Diameter HAWT (Field Measurements versus Wind Tunnel Measurements)

[+] Author and Article Information
T. Maeda, E. Ismaili, H. Kawabuchi, Y. Kamada

Department of Mechanical Engineering, Mie University, 1515 Kamihama-cho, Tsu, Mie 514-8507, Japan

J. Sol. Energy Eng 127(2), 185-191 (Apr 25, 2005) (7 pages) doi:10.1115/1.1850483 History: Received April 19, 2004; Revised September 02, 2004; Online April 25, 2005
Copyright © 2005 by ASME
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References

Madsen,  H. A., and Christensen,  H., 1990, “On the relative importance of rotational, unsteady and three-dimensional effects on the HAWT rotor aerodynamics,” Wind Eng., 14-6, pp. 405–415.
Huyer,  S. A., Simms,  D. A., and Robinson,  M. C., 1996, “Unsteady aerodynamics associated with a horizontal-axis wind turbine,” AIAA J., 34, No. 10, pp. 1410–1419.
Robinson, M. C., Simms, D. A., Hand., M. M., and Schreck., S. J, 1999, “Horizontal axis wind turbine aerodynamics: Three-dimensional, unsteady, and separated flow influences,” in Proc. 3rd ASME/JSME joint fluid engineering conference, San Francisco, CA, USA.
Schreck,  S. J., Robinson,  M. C., Simms,  D. A., and Hand.,  M. M., 2001, “Blade dynamic stall vortex kinematics for a horizontal axis wind turbine in yawed conditions,” ASME J. Sol. Energy Eng., 123, pp. 272–281.
Schepers, J. G., Brand, A. J., Bruining, A., Graham, J. M. R., Hand, M. M., Infield, D. G., Madsen, H. A., Paynter, R. H. J., and Simms, D. A., 1997, “Final report of IEA Annex XIV: Field rotor aerodynamics,” ECN-C-97-027, Petten, Netherlands.
Schepers, J. G., Brand, A., Madsen, H., Stefanatos, N., Simms, D., Hand, M., Bruining, A., van Rooij, R., Shimizu, Y., Maeda, T., and Graham, M., 2001, “IEA Annex XIV/XVIII, field rotor aerodynamics,” Proc. of EWEC, Copenhagen, Denmark, pp. 457–461.
Schepers, J. G., 1995, “Angle of attack in aerodynamic field measurements on wind turbines,” ECN Technical Report.
Schreck,  S., and Robinson,  M., 2002, “Rotational augmentation of horizontal axis wind turbine blade aerodynamic response,” Wind Eng., 5, pp. 133–150.
Schreck,  S., and Robinson,  M., 2003, “Boundary layer state and flow field structure underlying rotational augmentation of blade aerodynamic response,” ASME J. Sol. Energy Eng., 125, pp. 448–456.
Maeda, T., Kamada, Y., Shimizu, Y., Kakazu, S., Idomoto, T., Bruining, A., and van Rooij, R., 1999, “Unsteady pressure distribution on rotating blade of Mie university open air rotor research facility,” Proc. EWEC, Nice, France, pp. 121–124.

Figures

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Test blade. (a) Blade planform; (b) Section chord distribution; (c) Section twist distribution.
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Distribution of pressure taps
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Definition of aerodynamic forces
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Definition of local slip angle
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Time series of wind speed, U, wind direction, φ, rotor speed, N, local angle of attack, α, local slip angle, β, normal force coefficients, Cn, tangential force coefficients, Ct.
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Field data versus wind tunnel data. (a) Normal force coefficients, Cn, against local angle of attack, α; (b) Tangential force coefficients, Ct, against local angle of attack, α; (c) Moment coefficients, Cm, against local angle of attack, α.
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Ct versus Cn for several local slip angle, β, at field measurement
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Relation between Cn and β for several α at field measurement
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Relation between slope (ΔCn/Δβ) and α.
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Pressure distribution on blade surface. (a) α=10 deg; (b) α=16 deg; (c) α=20 deg.

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