Rotor blade for a wind turbine, and wind turbine field
AssigneeStichting Energieonderzoek Centrum Nederland
InventorsArne Van Garrel, Edwin Theodorus Gerardus Bot
Life of this patent
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Abstract
Rotor blade for a wind turbine, including a main blade part (4) with a blade tip (8). The blade tip (8) results in a blade tip vortex downstream of the rotor blade (1) during operation. The blade tip (8) includes a vortex de-stabilizer (7) which is configured to de-stabilize the blade tip vortex during operation of the rotor blade (1). Furthermore, a wind turbine field including a plurality of wind turbines positioned in a grid. One or more wind turbines on a boundary of the predetermined grid (e.g. a front row of the grid) are provided with at least one such rotor blade (1).
Claims16
A wind turbine field comprising:
- a plurality of wind turbines positioned in a predetermined grid, wherein only on a boundary of the predetermined grid at least one wind turbine is provided with at least one rotor blade comprising a main blade part with a blade tip, the blade tip resulting in a blade tip vortex downstream of the rotor blade during operation,
- wherein the blade tip comprises a vortex de-stabilizer, the vortex de-stabilizer comprising one or more local surface modification elements in a span wise area at the blade tip and being configured to de-stabilize the blade tip vortex and increase wake mixing downstream of the at least one wind turbine during operation of the rotor blade, and the vortex de-stabilizer being provided along a span wise total length L2 of at most 10% of a span wise total length L1 of the main blade part.
Dependencies are inferred from the claim text.