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http://dx.doi.org/10.6112/kscfe.2013.18.1.091

PREDICTION OF AERODYNAMIC PERFORMANCE LOSS OF A WIND TURBINE BLADE SECTION DUE TO CONTAMINANT ACCUMULATION  

Yang, T.H. (Dept. of Aerospace Engineering, KAIST)
Choi, J.H. (Dept. of Aerospace Engineering, KAIST)
Yu, D.O. (Dept. of Aerospace Engineering, KAIST)
Kwon, O.J. (Dept. of Aerospace Engineering, KAIST)
Publication Information
Journal of computational fluids engineering / v.18, no.1, 2013 , pp. 91-97 More about this Journal
Abstract
In the present study, the effects of contaminant accumulation and surface roughness on the aerodynamic performance of wind turbine blade sections were numerically investigated by using a flow solver based on unstructured meshes. The turbulent flow over the rough surface was modeled by a modified ${\kappa}-{\omega}$ SST turbulence model. The calculations were made for the NREL S809 airfoil with varying contaminant sizes and positions at several angles of attack. It was found that as the contaminant size increases, the degradation of the airfoil performance becomes more significant, and this trend is further amplified near the stall condition. When the contaminant is located at the upper surface near the leading edge, the loss in the aerodynamic performance of the blade section becomes more critical. It was also found that the surface roughness leads to a significant reduction of lift, in addition to increased drag.
Keywords
Computational Fluid Dynamics; Wind Turbine Blade Section; Contaminant Accumulation; Surface Roughness; Aerodynamic Performance Loss;
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