公开(公告)号：DE602006014049D1

公开(公告)日：2010-06-17

申请号：DE602006014049

申请日：2006-04-05

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SANICKI SCOTT ,  COSTA MARK W

IPC: F02K1/82 ,  F02K99/00

公开(公告)号：CA2536583A1

公开(公告)日：2006-10-22

申请号：CA2536583

申请日：2006-02-15

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SANICKI SCOTT ,  COSTA MARK W

IPC: F01D25/24 ,  F01D25/28 ,  F02C7/045 ,  F02K99/00

Abstract: 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 i s 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 laye r. 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.