Title: Effect of Asymmetric Blunt Trailing-edge Thickness on Aerodynamic Performance of Wind Turbine Airfoils
Abstract: Based on parametric asymmetric blunt trailing-edge airfoil,the effects of trailing-edge thickness and its distribution ratio on aerodynamic performance of wind turbine airfoil were studied.The parametric expressions of asymmetric blunt trailing-edge modification profiles of S834 airfoil were established using the spline function.The lift and drag coefficients,lift-drag ratio,and airfoil surface pressure coefficient were calculated by XFOIL.The results show that when trailing-edge thickness increases,the lift coefficient increases after certain attack angle,and it is more obvious that the drag coefficients of modified airfoils are higher than that of original airfoil,and the lift-drag ratio increases first and then decreases.The lift coefficient in certain range of attack angle and the lift-drag ratio increase with the increasing of the trailing-edge thickness distribution ratio of the lower surface.The best trailing-edge thickness and distribution ratio are 2%c and 1 3,respectively.The research provides significant guidance for designing and optimizing blunt trailing-edge airfoil of wind turbine blade.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 1
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