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US 10,240,576 B2Granted
Wind turbine noise reduction with acoustically absorbent serrations
AssigneeGeneral Electric Company
InventorsLorenz Edwin Drack, Thierry Pascal Maeder, Roger Drobietz
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Abstract
A wind turbine blade includes a trailing edge including a radially inboard portion and a radially outboard portion opposite the radially inboard portion. The trailing edge further includes at least one serrated portion extending at least partially between the radially inboard portion and the radially outboard portion. The serrated portion includes at least one substantially acoustically absorbent material.
Claims18
A wind turbine blade comprising:
- a trailing edge comprising:
- a radially inboard portion;
- a radially outboard portion opposite said radially inboard portion;
- and
- at least one serrated portion extending at least partially between said radially inboard portion and said radially outboard portion, said serrated portion comprising a base portion and a plurality of tip portions defining a serrated edge, said serrated portion extending from said base portion to said plurality of tip portions in a direction away from a leading edge opposite said trailing edge, said serrated portion comprising at least one substantially acoustically absorbent material encased in a casing material.
2 more elements
A wind turbine blade comprising:
- a trailing edge comprising:
- a radially inboard portion;
- a radially outboard portion opposite said radially inboard portion;
- and
- at least one serrated portion extending at least partially between said radially inboard portion and said radially outboard portion, said serrated portion comprising a base portion and a plurality of tip portions defining a serrated edge, said serrated portion extending from said base portion to said plurality of tip portions in a direction away from a leading edge opposite said trailing edge, said serrated portion comprising at least one substantially acoustically absorbent material encased in a casing material,
- wherein said at least one substantially acoustically absorbent material is at least one of structural foam, a series of three dimensional structures including a plurality of pores defined therein formed by additive manufacturing, a self-supporting shell with an epoxy matrix, and a micro-perforated metal.
3 more elements
Dependencies are inferred from the claim text.