US 12,305,612 B2
Wind turbine blade and wind turbine with a plurality of add-on elements
Peder Bay Enevoldsen, Vejle (DK); Peter Fuglsang, Vejle (DK); Florian Girschig, Skørping (DK); and Jonas Madsen, Tjæreborg (DK)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 18/555,138
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Mar. 8, 2022, PCT No. PCT/EP2022/055901
§ 371(c)(1), (2) Date Oct. 12, 2023,
PCT Pub. No. WO2022/223194, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 21169132 (EP), filed on Apr. 19, 2021.
Prior Publication US 2024/0191687 A1, Jun. 13, 2024
Int. Cl. F03D 1/06 (2006.01)
CPC F03D 1/0675 (2013.01) [F05B 2240/122 (2013.01); F05B 2240/304 (2020.08); F05B 2240/305 (2020.08); F05B 2240/3062 (2020.08); F05B 2240/311 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wind turbine blade comprising a plurality of add-on elements, which are arranged on an outer surface of the blade, wherein the plurality of add-on elements comprises at least one flexible add-on element and at least one stiff add-on element of the same add-on element type, wherein the at least one flexible add-on element consists at least predominantly of an elastic material and the at least one stiff add-on element consists at least predominantly of a stiff material, which is stiffer than the elastic material, wherein the at least one flexible add-on element and the at least one stiff add-on element are arranged offset in a span-wise direction and/or in a chord-wise direction of the blade,
wherein one or more flexible add-on elements of the at least one flexible add-on element are arranged in a surface portion of the blade, which has a span-wise length between 1 m and 5 m and extends in the chord-wise direction at least partly around an outer circumference of the blade, wherein a center of the surface portion in the span-wise direction is distanced from a root-side end of the blade between 33% and 50% of the span-wise length of the blade, wherein the at least one stiff add-on element is arranged outside of the surface portion.