Wind turbine blade and method of controlling the lift of such a blade
AssigneeALSTOM Renewable Technologies
InventorJaume Betran Palomas
Life of this patent
Estimating the term…
Abstract
Wind turbine blade comprising a shape modifiable airfoil section that extends both chordwise and spanwise and has a not modified default shape, a conduit that extends from the inside of the blade towards the outside of the blade, and an outer part comprising a flow regulator that is located at the shape modifiable airfoil section and blocks the conduit when the shape modifiable airfoil section presents its default shape, and does not block the conduit when the shape modifiable airfoil section presents a modified shape. In the latter situation the conduit is opened to the outside of the blade and a device for exchanging a fluid between the inside and the outside of the blade is thus defined.
Claims16
A wind turbine blade comprising:
- a shape modifiable airfoil section that extends both chordwise and spanwise and has an undeformed default shape,
- a conduit that extends from an inside of the blade to an outside surface of the blade, and
- an outer part of the conduit comprising a flow regulator located at the shape modifiable airfoil section, the flow regulator blocking the conduit when the shape modifiable airfoil section presents the default shape, and
- in a deformed shape, the shape modifiable airfoil section comprising an increased curvature that causes the flow regulator to move and unblock the conduit, thereby allowing an air exchange between the inside and the outside of the blade.
A wind turbine blade comprising:
- a shape modifiable airfoil section that extends both chordwise and spanwise and has an undeformed default shape,
- a conduit that extends from an inside of the blade to an outside surface of the blade, and
- an outer part of the conduit comprising a flow regulator located at the shape modifiable airfoil section, the flow regulator being suited to block the conduit when the shape modifiable airfoil section presents the default shape, and not suited to block the conduit when the shape modifiable airfoil section presents a deformed shape, thereby allowing an air exchange between the inside and the outside of the blade;
- a chamber located at the inside of the blade and connected to the conduit;
- and
- wherein the chamber is provided with a membrane suited to vibrate when actuated by the air exchange.
Dependencies are inferred from the claim text.