Vertical axis wind turbine with optimized blade profile
OwnerHamid Rahai, Hamid Hefaziinventors
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Abstract
A high efficiency vertical axis wind turbine includes an optimized blade shape for increased torque output. The shape of the optimized profile includes a camber portion at a leading edge region of the blade with a maximum height to chord ratio (Y/C) at when the non-dimensional chord length (X/C) is approximately one third. An intermediate region follows the leading edge region and is characterized by a shallow convex region, followed by a flow reattachment surface at the trailing edge region characterized by a second concave region and a local maximum of the height to chord ratio at approximately four fifths of the non-dimensional chord length.
Claims14
A vertical axis wind turbine comprising:
- a vertical shaft mounted for rotation about an axis;
- an upper plate disposed perpendicular to said axis about said vertical shaft;
- a lower plate disposed perpendicular to said axis about said vertical shaft;
- a transmission coupled to said shaft;
- and
- a plurality of blades disposed between said upper and lower plates, said blades having a profile defining a camber portion at a leading edge region, a convex portion at an intermediate region, and a concave portion at a trailing edge region.
A blade for a vertical axis wind turbine comprising:
- a solid body having a profile defining a camber portion at a leading edge region, a convex portion at an intermediate region, and a concave portion at a trailing edge region.
Dependencies are inferred from the claim text.