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

Author:

Maeda T.1,Ismaili E.1,Kawabuchi H.1,Kamada Y.1

Affiliation:

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

Abstract

This paper exploits blade surface pressure data acquired by testing a three-bladed upwind turbine operating in the field. Data were collected for a rotor blade at spanwise 0.7R with the rotor disc at zero yaw. Then, for the same blade, surface pressure data were acquired by testing in a wind tunnel. Analyses compared aerodynamic forces and surface pressure distributions under field conditions against analogous baseline data acquired from the wind tunnel data. The results show that aerodynamic performance of the section 70%, for local angle of attack below static stall, is similar for free stream and wind tunnel conditions and resemblances those commonly observed on two-dimensional aerofoils near stall. For post-stall flow, it is presumed that the exhibited differences are attributes of the differences on the Reynolds numbers at which the experiments were conducted.

Publisher

ASME International

Subject

Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment

Reference10 articles.

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2. 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.

3. 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.

4. 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.

5. 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.

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