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US 10,294,867 B2Granted
Methods and apparatus for noise attenuation in an engine nacelle
AssigneeThe Boeing Company
InventorsAlex C. Lumbab, Bradley Scott Leisten
Life of this patent
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Abstract
An inner barrel for a nacelle for an engine is provided. The inner barrel includes a radially inner acoustic liner and a radially outer structural barrel. The structural barrel includes a flange for coupling the inner barrel to the nacelle. At least a portion of the flange is formed integrally with the structural barrel.
Claims19
An inner barrel for a nacelle for an engine, the inner barrel comprising:
- a radially inner acoustic liner;
- and
- a radially outer structural barrel, comprising:
- a structural core comprising a plurality of core cells defined by a corresponding plurality of core cell walls;
- and
- a flange for coupling the inner barrel to the nacelle,
- wherein at least a portion of the flange is formed integrally with the structural barrel.
4 more elements
A method of making a nacelle, the method comprising:
- disposing a fabric sheet generally concentrically around a first core, wherein the first core comprises a plurality of first core cells defined by a corresponding plurality of first core cell walls, the first core having a first core thickness;
- disposing a second core generally concentrically about the fabric sheet, wherein the second core comprises a plurality of second core cells defined by a corresponding plurality of second core cell walls, the second core having a second core thickness;
- coupling the fabric sheet between the first core and the second core;
- coupling the second core to a radially outer structural barrel, the structural barrel including (i) a plurality of third core cells defined by a corresponding plurality of third core cell walls and (ii) a flange, wherein at least a portion of the flange is formed integrally with the structural barrel;
- and
- coupling the flange of the structural barrel to a turbofan casing.
3 more elements
Dependencies are inferred from the claim text.