US 12,188,451 B2
Noise reduction element and a wind turbine blade comprising a noise reduction element
Jeremy Hurault, Eastleigh (GB); Dongke Sun, Eastleigh (GB); Guannan Wang, Salzbergen NI (DE); Jesper Madsen, Kolding (DK); and Lars Bo Hansen, Kolding (DK)
Appl. No. 17/794,071
Filed by LM Wind Power A/S, Kolding (DK)
PCT Filed Feb. 23, 2021, PCT No. PCT/EP2021/054453
§ 371(c)(1), (2) Date Jul. 20, 2022,
PCT Pub. No. WO2021/170585, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2002557 (GB), filed on Feb. 24, 2020.
Prior Publication US 2023/0049133 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F03D 80/30 (2016.01); F03D 1/06 (2006.01); F03D 7/02 (2006.01)
CPC F03D 80/30 (2016.05) [F03D 1/0675 (2013.01); F03D 1/069 (2023.08); F03D 7/0296 (2013.01); F03D 7/0298 (2023.08); F05B 2260/96 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A noise reduction element for a wind turbine blade, the noise reduction element extending between a first end and a second end in a first direction, and the noise reduction element extending between a third end and a fourth end in a second direction perpendicular to the first direction, the noise reduction element comprising:
a base part configured to be attached to the wind turbine blade, the base part having a first base part surface and a second base part surface and extending between the first end and a first position in the first direction; and
a first serration part extending in the first direction from the first position to the second end and comprising a serration pressure surface and a serration suction surface, the first serration part having a thickness in a third direction between the serration pressure surface and the serration suction surface, wherein the thickness of the first serration part varies along the first direction, the first serration part having a width in the second direction between a first intersection between the serration pressure surface and the serration suction surface and a second intersection between the serration pressure surface and the serration suction surface, and
wherein at least part of the first serration part is electrically conductive and configured to attract and conduct lightning current to ground.