Wind turbine blade and wind turbine with a plurality of add-on elements
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsPeder Bay Enevoldsen, Peter Fuglsang, Florian Girschig, Jonas Madsen
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Abstract
A wind turbine blade includes a plurality of add-on elements, which are arranged on an outer surface of the blade, wherein the plurality of add-on elements includes at least one flexible add-on element and at least one stiff add-on element of the same add-on element type, wherein the flexible add-on element is made at least predominantly of an elastic material and the stiff add-on element are made at least predominantly of a stiff material, which is stiffer than the elastic material, wherein the flexible add-on element and the stiff add-on element are arranged offset in span-wise direction and/or in chord-wise direction of the blade.
Claims20
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.
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 pair of surface portions, which each have a span-wise length between 1 m and 5 m and which each extend in the chord-wise direction at least partly around the outer circumference of the blade, wherein the surface portions are arranged offset in the span-wise direction around the center of gravity of the blade, wherein the at least one stiff add-on element is arranged outside of the surface portions.
Dependencies are inferred from the claim text.