Rotor blade, wind turbine, and method for optimizing a wind turbine

Patent metadata

Field	Value
Publication number	US-11459999-B2
Application number	US-201917271975-A
Country	US
Kind code	B2
Filing date	Aug 27, 2019
Priority date	Aug 30, 2018
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A rotor blade of a rotor of a wind turbine, and to an associated wind turbine, and to a method for optimizing a wind turbine. Prior to being mounted on the wind turbine, the rotor blade is split at a parting point into an inner blade section and an outer blade section, wherein a longitudinal direction of the rotor blade is defined from the root section to the blade tip, wherein the rotor blade has at least one swirl element, wherein the swirl element has an extent in the longitudinal direction of the rotor blade, wherein a distance between a start, facing toward the root section, and an end, facing toward the rotor blade tip, of the swirl element in the longitudinal direction is referred to as total length, and wherein a distance between the parting point and the outer end of the swirl element is referred to as outer length, wherein a ratio of outer length to total length is less than 0.25.

First claim

The invention claimed is:

1. A rotor blade of a rotor of a wind turbine, comprising:
an inner blade section,
an outer blade section,
a parting point, and
at least one swirl element,
wherein, prior to being mounted on the wind turbine, the rotor blade is split apart at the parting point into the inner blade section and the outer blade section, wherein the inner blade section extends from a root section for mounting the rotor blade on the rotor of the wind turbine to the parting point, and the outer blade section extends from the parting point to a rotor blade tip,
wherein a longitudinal direction of the rotor blade is defined from the root section to the blade tip,
wherein the swirl element extends in the longitudinal direction of the rotor blade,
wherein a distance between a start, facing toward the root section, and an end, facing toward the rotor blade tip, of the swirl element in the longitudinal direction is referred to as a total length,
wherein a distance between the parting point and the end of the swirl element is referred to as an outer length, and
wherein a ratio of the outer length to the total length is less than 0.25.

2. The rotor blade as claimed in claim 1 , wherein the swirl element has one or more vortex generators arranged on a suction side of the rotor blade.

3. The rotor blade as claimed in claim 2 , wherein the one or more vortex generators are formed as fins arranged in pairs and are perpendicular to the suction side.

4. The rotor blade as claimed in claim 3 , wherein the one or more vortex generators have a geometry as a function of position in the longitudinal direction of the rotor blade.

5. The rotor blade as claimed in claim 1 , wherein the start of the swirl element is adjacent to the root section.

6. The rotor blade as claimed in claim 1 , wherein the outer length is negative if the end of the swirl element, in the longitudinal direction, is situated closer to the root section than the parting point such that the ratio of the outer length to the total length is negative.

7. The rotor blade as claimed in claim 1 , wherein parting point is a first parting point, wherein the outer blade section has a second parting point.

8. A rotor having at least one rotor blade as claimed in claim 1 , wherein a diameter of the rotor is at least 170 meters.

9. A wind turbine having the rotor as claimed in claim 8 .

10. A wind farm having a plurality of wind turbines as claimed in claim 9 .

11. The rotor blade as claimed in claim 1 , wherein the ratio of the outer length to the total length is less than 0.2.

12. The rotor blade as claimed in claim 1 , wherein the ratio of the outer length to the total length is less than 0.15.

13. A method for optimizing a wind turbine, wherein the wind turbine has an aerodynamic rotor having at least one rotor blade, wherein the rotor blade is split at a parting point into an inner blade section and an outer blade section, wherein the inner blade section extends from a root section for mounting the rotor blade on a rotor hub of the wind turbine to the parting point, and the outer blade section extends from the parting point to a rotor blade tip,
wherein a longitudinal direction of the rotor blade is defined from the root section to the rotor blade tip, and
wherein the method comprises:
mounting at least one swirl element to the rotor blade, wherein the mounting comprises mounting the at least one swirl element so that the at least one swirl element extends in the longitudinal direction of the rotor blade, wherein a distance between a start, facing toward the root section, and an end, facing toward the rotor blade tip, of the at least one swirl element in the longitudinal direction is referred to as a total length, and wherein a distance between the parting point and the outer end of the at least one swirl element is referred to as an outer length, and
wherein the at least one swirl element is provided and mounted in such a way that a ratio of the outer length to the total length is less than 0.25.

14. The method as claimed in claim 13 , wherein the ratio of outer length to total length is less than 0.2.

15. The method as claimed in claim 13 , wherein the ratio of the outer length to the total length is less than 0.15.

Assignees

• Wobben Properties Gmbh

Inventors

• Messing Ralf
• Ziems Jan Carsten
• Rubner Florian

Classifications

• F05B2240/302

  Segmented or sectional blades · CPC title

• F05B2240/3062

  Vortex generators · CPC title

• F05B2240/2211

  of the multibladed, low speed, e.g. "American farm" type · CPC title

• F03D1/0633 Primary

  of the blades · CPC title

• F03D1/0677

  Longitudinally segmented blades; Connectors therefor · CPC title