Fluid reaction surfaces (i.e. – impellers) – Combined or convertible – Hub lubrication or seal
Reexamination Certificate
2011-03-29
2011-03-29
Nguyen, Ninh H (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Combined or convertible
Hub lubrication or seal
C416S228000, C416S23600R
Reexamination Certificate
active
07914259
ABSTRACT:
An advantageous new design of a wind turbine blade and rotor is obtained by providing one, two or more parallel rows of sub-boundary layer vortex generators, whereby a blade is obtained, which is resistant to stall and provides for a high maximum lift coefficient CL,maxof the blades and a slender blade design, a low socalled radius specific solidity of the rotor. The very high lift coefficient CLcan reduce the necessary blade area and loads or/and increase the length of the blade and maintain the original loads with higher production. The row or rows of sub-boundary layer vortex generators are in a preferred embodiment of the invention provided in combination with Gurney Flaps generating a very high lift coefficient CLwith a relative gentle stall at very high angle of attack.
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Interna
Nguyen Ninh H
St. Onge Steward Johnston & Reens LLC
Vestas Wind Systems A/S
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