In order to improve the aerodynamic performance of large-thickness airfoils at the root of large blades and enhance the power generation of the blades
this study investigates the influence of T-shaped spoilers with different heights on the aerodynamic characteristics of two large-thickness airfoils using numerical simulation. The results show that within a certain range of angles of attack
the spoiler alters the pressure distribution on the airfoil surface and increases the lift coefficient
drag coefficient
and lift-to-drag ratio. As the height of the spoiler increases
the lift coefficient further increases. The increase in lift coefficient caused by the spoiler is significantly greater for the thicker airfoil compared to the thinner one. Installing a spoiler at the blade root simultaneously increases the annual energy production (AEP) and the structural load on the blade.
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