Lm Wp Patent Holding A/s

Lm Wind Power US Technology Aps

Lm Wind Power A/s

Lm Wind Power International Technology II Aps

Carlos Arce

Jesper Madsen

Peter Baek

Martin Dahl

Jordy Hertel Nilsson Van Kalken

Bjarke Van Malkenhorst

Bjarke Nielsen

This invention relates to a noise reducing device, a wind turbine blade comprises such a noise reducing device, a method of retrofitted a noise reducing device, and a method of manufacturing such a noise reducing device. The noise reducing device comprises first noise reducing elements projecting from a base part having a third surface towards a second end. Second noise reducing elements are attached to the third surface and projects along the first noise reducing elements towards the second end. The first noise reducing elements are preferably serrations while the second noise reducing elements are bristles. The bristles projects at least into the gaps formed between adjacent serrations.

Wind turbine blade comprising a trailing edge noise reducing device

This invention relates to a noise reducing device and a wind turbine blade comprises such a noise reducing device. The noise reducing device comprises noise reducing elements projecting from a base part towards a second end. Airflow modifying elements projects further from the base part towards a first end. The noise reducing elements and airflow modifying elements are arranged on opposite sides of the base part and preferably have different dimensions and/or shapes.

Wind turbine blade comprising a noise reducing device

A wind turbine blade () is described having a serrated trailing edge (). Splitter plates () are provided on the blade, to reduce operational noise. Each splitter plate () is arranged to extend at least partly into a space in between adjacent serrations. The splitter plates can be formed integrally with the serrations, or attached to existing serrations as a retrofit solution. The serrations with the splitter plates can be provided as a trailing edge panel () for attachment to the trailing edge of an existing wind turbine blade.

Splitter plate arrangement for a serrated wind turbine blade

The present invention relates to a wind turbine blade () comprising two or more serrations () provided along a section (S) of the trailing edge (). The section (S) extends spanwise from the tip end () towards the root end () for up to 5% of the total blade length (L), The serration () closest to the tip end has a height (H) and/or width (W) greater than the respective height (H) and/or width (W) of at least one other serration () in said section. The present invention also relates to a wind turbine () comprising at least one wind turbine blade () of the present invention and to a serrated panel ().

Wind turbine blade with tip end serrations

A wind turbine blade is described having a serrated trailing edge. Flow straightening vanes are provided on the serrations, to prevent a lateral or side flow over the edges of the serrations, which are preferably provided at incidence to the flow over the wind turbine blade. The vanes can be formed integrally with the serrations, or attached to existing serrations as a retrofit solution. The serrations with the vanes can be provided as a trailing edge panel for attachment to the trailing edge of an existing wind turbine blade.

Wind turbine blade

A wind turbine blade is described, as well as a trailing edge plate for a wind turbine blade. A flexible flow modulation device, e.g. an acoustic flap or a plurality of serrations, is arranged at the trailing edge of a wind turbine blade, wherein the flexible device is coupled to at least one aerodynamic device, preferably vortex generators. As the flexible device is bent by action of flow over the wind turbine blade, the at least one aerodynamic device is deployed to provide for attached flow over the bent flexible device.

Growing community of inventors

Kolding, Denmark

Carlos Arce