WIND TURBINE WITH ASYMMETRICAL AEROFOILS ROTATING AROUND AN AXIS PERPENDICULAR TO WIND DIRECTION AND WITH WIND BARRIERS EITHER SIDE OF AEROFOILS

摘要

589610 Disclosed is a wind turbine with a rotating axis that is perpendicular to the wind direction. The wind turbine comprises a plurality of blades arranged for rotation about a central axis where each blade is oriented substantially parallel to the axis and has an inner surface oriented towards the axis and an outer surface oriented away from the axis. Each blade has an asymmetrical aerofoil shape with curved outer and inner surfaces where the outer surface is convex and the inner surface is concave at least in part, such that as the blade rotates about the axis lift is generated on the blade. Two substantially diametrically opposed wind barriers, extend substantially parallel to the axis; and have an axially extending inner edge radially spaced from an outer swept surface of the turbine blades. The spacing of the wind barriers from the outer swept surface is between 2% and 20% of the radius of the outer swept surface, preferably about 7% of the radius of the outer swept surface.