System and method for passive load attenuation in a wind...

Details System and method for passive load attenuation in a wind... System and method for passive load attenuation in a wind...

2006-12-26

2006-12-26

Nguyen, Hoang (Department: 3748)

Rotary kinetic fluid motors or pumps

With means for controlling casing or flow guiding means in...

Natural fluid current force responsive

C415S004400, C416S233000, C416S24100B

Reexamination Certificate

active

07153090

ABSTRACT:
In accordance with certain embodiments, a wind turbine blade includes an outer skin and an internal support structure. The skin has a closed airfoil shape and includes an outer surface, an inner surface, and opposite sides along a length of the blade. The internal support structure is disposed within the closed airfoil shape. The internal support structure includes at least one shear load bearing member disposed across the opposite sides and oriented lengthwise along the length of the blade. The internal support structure further includes a plurality of bending load bearing members disposed along the inner surface in a lengthwise direction along the length of the blade. The internal support structure is configured to position a shear center and a center of aerodynamic pressure loading of the blade at different locations relative to one another.

REFERENCES:
patent: 3606580 (1971-09-01), Kaufman, Sr.
patent: 3768922 (1973-10-01), Dixon
patent: 4381960 (1983-05-01), Pinter et al.
patent: 5474425 (1995-12-01), Lawlor
patent: 5499904 (1996-03-01), Wallace et al.
patent: 2005/0214122 (2005-09-01), Sorensen et al.

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