Influence of parabolic slot on aerodynamic performance of wind turbine airfoil
In order to effectively improve the aerodynamic performance of the airfoil,the S809 airfoil is taken as the basic research object for passive flow control mode,and the parabolic wing slots are construc-ted.The inlet and outlet of the slots are both on the airfoil pressure surface.In addition to the influence of the inlet and outlet positions of parabolic slots on the aerodynamic performance of the airfoil,the influence of the width of the slots at the vertex position is also studied by the numerical simulation method of compu-tational fluid dynamics,and the mechanism of the slots is analyzed by combining the flow field structure.The results show that the lift coefficient of the parabolic slots is better than that of the original airfoils at various angles of attack,and the lift-drag ratio of the parabolic slots is greater than that of the original air-foils at angles of attack from 12°to 18°,with the maximum increase of about 10.2%.According to the flow field analysis,the pressure generated by the slots increases the overall pressure difference of the airfoil,which is the main reason for the improvement of the aerodynamic performance of the parabolic slots.
airfoilparabolic wing slotaerodynamic performanceflow field
万方数据
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