Wind turbine rotor assembly and blade having acoustic flap
First Claim
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1. A blade for a wind turbine, said blade comprising:
- a blade body defining a leading edge and a trailing edge and adapted for movement in response to a wind flow over the body to produce electricity; and
a rigid acoustic flap extending outward from the trailing edge, wherein a distal end of the acoustic flap is substantially smooth and continuous.
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Abstract
A wind turbine includes a rotor assembly having at least one blade with a blade body defining a leading edge and a trailing edge and adapted for movement in response to a wind flow over the body to produce electricity. A rigid acoustic flap extends outward from the trailing edge, and a distal end of the acoustic flap is substantially smooth and continuous. The flap reduces acoustic noise generated by the blade in use.
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Citations
20 Claims
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1. A blade for a wind turbine, said blade comprising:
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a blade body defining a leading edge and a trailing edge and adapted for movement in response to a wind flow over the body to produce electricity; and
a rigid acoustic flap extending outward from the trailing edge, wherein a distal end of the acoustic flap is substantially smooth and continuous. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A rotor assembly for a wind turbine, said rotor comprising:
a plurality of blades rotatable about an axis in response to wind impinging upon the blades, wherein at least one of the blades comprises;
a blade body defining a leading edge, a trailing edge and a chord distance therebetween; and
a rigid acoustic flap secured to the blade body and extending outward from the trailing edge for a specified fraction of the chord distance, thereby reducing trailing edge noise broadband and tonality as the blade is rotated. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A wind turbine comprising:
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a rotatable shaft coupled to a generator; and
at least one blade coupled to the shaft and movable by wind for the generation of electricity, the at least one blade comprising;
a body defining a leading edge, a trailing edge and a chord distance therebetween, the body having a high pressure side and a low pressure side; and
a rigid acoustic flap secured to the high pressure side and extending outward from the trailing edge to a smooth distal end, thereby reducing trailing edge noise broadband and tonality. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification