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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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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