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http://dx.doi.org/10.17664/ksgee.2020.16.1.001

Power Coefficient and Pressure Distributions on Blade Surfaces of a Wind Turbine with Tiltable Blades by 3D Simulations  

Jeong, Chang-Do (Graduate School of Energy and Environment, SeoulTech)
Bae, Hyunwoo (Graduate School, SeoulTech)
Sung, Jaeyong (Department of Mechanical and Automotive Engineering, SeoulTech)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.16, no.1, 2020 , pp. 1-8 More about this Journal
Abstract
In this study, a new shape of wind turbine with horizontal axis has been proposed. The proposed wind turbine has two pairs of 3 tiltable blades which minimizes air resistance during the reverse rotational direction. Under a given wind speed, 3D numerical simulations on tiltable blades were performed for various TSRs(tip-speed-ratios). Four cases of rotational position was considered to analyze the torque and wind power generated on the blade surfaces. The results show that the maximum wind power occurs at the TSR of 0.2. Due to the blade tilting, the wind passes through the blade without air resistance at the reverse rotational direction. The torque is mainly caused by pressure differences between the front and rear surface of the blade, and it becomes maximum when the blade is located at the azimuth angle of 330°.
Keywords
Wind turbine; Tiltable blades; 3D simulation; Tip-speed-ratio; Pressure distribution;
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