The invention discloses a wind
turbine blade capable of improving stalling characteristics based on fractal optimization. The wind
turbine blade comprises a blade body positioned at the front part corresponding to a flow incoming direction, and a blade
tail edge positioned at the back part corresponding to the flow incoming direction; the blade
tail edge is distributed with multiple elastic pieces and fractal holes with fractal structures; the elastic pieces are arranged on
suction surface sizes of the fractal holes, and are suffered from a
pressure difference effect of a blade pressure surface and a suction furnace to locate in a closing or opening state; and the fractal holes penetrate through the pressure surface and the suction furnace. When the blade incoming flow
attack angle
dose not reach stalling conditions, as the
pressure difference between the blade pressure surface and the
suction surface is smaller, and at this time, the elastic pieces are located in the closing state to stop passing of a fluid to stop small-scale turbulence so as to guarantee the blade pneumatic performances; when the blade incoming flow
attack angle is increased to reach the stalling conditions, the elastic pieces are located in the opening state due to the effect of
pressure difference, and the fluid can pass through the fractal holes to generate small-scale turbulence on the suction furnace to
delay separation of a blade surface boundary layer, so that the formation of stalling clusters is delayed, and the purpose of improving the blade stalling characteristics is achieved.