Acoustic mechanical retainer

Details Acoustic mechanical retainer Acoustic mechanical retainer

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 25/24 (2006.01) F01D 25/28 (2006.01) F02C 7/045 (2006.01)

Patent

CA 2536583

A fan case assembly includes a noise attenuation layer that is covered by a face sheet. The face sheet includes a first plurality of openings. The noise attenuation layer includes a plurality of individual cells that are in communication with at least one of the first plurality of openings. Noise energy is communicated through the first plurality of openings into the individual cells and dissipated to reduce noise emissions. A seam in the face sheet is covered to protect the underlying noise attenuation layer from damage by a retainer. The retainer is bonded to the face sheet over the seam and includes a second plurality of holes that communicates noise energy through the retainer to the noise attenuation layer. Communication of noise energy through the retainer provides an acoustically active seam that aids in the dissipation of noise energy and thereby reduces the level of sound emitted from the engine.

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