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US 12,553,413 B2Granted
Wind turbine blade and wind turbine
AssigneeSiemens Gamesa Renewable Energy A/S
InventorSteven Buck
Life of this patent
Estimating the term…
Abstract
A wind turbine blade, comprising a sensor device for detecting properties of flow-induced noise produced by the blade and an actuator device for emitting an anti-noise signal for at least partially cancelling out the flow-induced noise, wherein the actuator device comprises an aerodynamically shaped housing attached to an outer surface of the blade. The aerodynamically shaped housing of the actuator device reduces a deterioration the aerodynamic efficiency of the blade. Further, the generation of turbulences at sharp edges of the housing is avoided.
Claims16
A wind turbine blade, comprising:
- a sensor device for detecting properties of flow-induced noise produced by the blade;
- and
- an actuator device for emitting an anti-noise signal for at least partially cancelling out the flow-induced noise, wherein the actuator device includes an aerodynamically shaped housing that is a symmetric airfoil such that a first side of the housing and a second side of the housing are symmetric to each other with respect to a chord line connecting a leading edge of the housing and a trailing edge of the housing, the housing being attached at one of a suction side and a pressure side of the blade such that a distance between the housing and a trailing edge of the blade is shorter than a distance between the housing and a leading edge of the blade, at least one diaphragm, wherein a first surface of the at least one diaphragm is exposed at an outer surface of the housing for converting kinetic energy into acoustic energy for generating the anti-noise signal such that a sound wave is generated by the moving diaphragm and emitted by the actuator device, and at least one closed gas chamber accommodated inside the housing configured to increase acoustic radiation efficiency of the sound wave generated by the moving diaphragm and emitted by the actuator device such that a second surface of the at least one diaphragm forms part of an enclosure of the at least one closed gas chamber, wherein the actuator device is attached to an attachment surface of the blade and without using a hole in the blade, wherein a plurality of actuator units are located within the at least one closed gas chamber, and wherein each actuator unit of the plurality of actuator units includes a respective diaphragm for converting kinetic energy into acoustic energy, wherein the at least one gas closed gas chamber includes multiple closed and spaced apart gas chambers, each of the multiple closed and spaced apart gas chamber being associated with a corresponding actuator unit of the plurality of actuator units such that a diaphragm of a respective actuator unit forms part of an enclosure of a respective associated gas chamber;
- wherein the leading edge of the housing having a tapered section that is concavely shaped in a direction of a leading edge of the blade that is adjacent to a rounded edge that leads to an outer surface of the housing, the trailing edge of the housing having a tapered section that is concavely shaped in a direction of a trailing edge of the blade that is adjacent to a rounded edge that leads to the outer surface of the housing.
1 more element
A wind turbine blade, comprising:
- a sensor device for detecting properties of flow-induced noise produced by the blade;
- and
- an actuator device for emitting an anti-noise signal for at least partially cancelling out the flow-induced noise, wherein the actuator device includes an aerodynamically shaped housing that is a symmetric airfoil such that a first side of the housing and a second side of the housing are symmetric to each other with respect to a chord line connecting a leading edge of the housing and a trailing edge of the housing, the housing being attached at one of a suction side and a pressure side of the blade such that a distance between the housing and a trailing edge of the blade is shorter than a distance between the housing and a leading edge of the blade, at least one diaphragm, wherein a first surface of the at least one diaphragm is exposed at an outer surface of the housing for converting kinetic energy into acoustic energy for generating the anti-noise signal such that a sound wave is generated by the moving diaphragm and emitted by the actuator device, and at least one closed gas chamber accommodated inside the housing configured to increase acoustic radiation efficiency of the sound wave generated by the moving diaphragm and emitted by the actuator device such that a second surface of the at least one diaphragm forms part of an enclosure of the at least one closed gas chamber, wherein the actuator device is attached to an attachment surface of the blade and without using a hole in the blade;
- wherein the leading edge of the housing having a tapered section that is concavely shaped in a direction of a leading edge of the blade that is adjacent to a rounded edge that leads to an outer surface of the housing, the trailing edge of the housing having a tapered section that is concavely shaped in a direction of a trailing edge of the blade that is adjacent to a rounded edge that leads to the outer surface of the housing.
1 more element
A wind turbine blade, comprising:
- a sensor device for detecting properties of flow-induced noise produced by the blade;
- and
- an actuator device for emitting an anti-noise signal for at least partially cancelling out the flow-induced noise, wherein the actuator device includes an aerodynamically shaped housing that is a symmetric airfoil such that a first side of the housing and a second side of the housing are symmetric to each other with respect to a chord line connecting a leading edge of the housing and a trailing edge of the housing, the housing being attached at one of a suction side and a pressure side of the blade such that a distance between the housing and a trailing edge of the blade is shorter than a distance between the housing and a leading edge of the blade, at least one diaphragm, wherein a first surface of the at least one diaphragm is exposed at an outer surface of the housing for converting kinetic energy into acoustic energy for generating the anti-noise signal, and at least one closed gas chamber accommodated inside the housing such that a second surface of the at least one diaphragm forms part of an enclosure of the at least one closed gas chamber, wherein the actuator device is attached to an attachment surface of the blade and without using a hole in the blade;
- wherein the leading edge of the housing having a tapered section that is concavely shaped in a direction of a leading edge of the blade that is adjacent to a rounded edge that leads to an outer surface of the housing, the trailing edge of the housing having a tapered section that is concavely shaped in a direction of a trailing edge of the blade that is adjacent to a rounded edge that leads to the outer surface of the housing.
1 more element
Dependencies are inferred from the claim text.