公开(公告)号：CA2562452A1

公开(公告)日：2007-05-04

申请号：CA2562452

申请日：2006-10-03

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FEIEREISEN JOHN MICHAEL ,  PRASAD ANIL ,  PRASAD DILIP

IPC: F16L55/033 ,  F01D9/02 ,  F02C7/24 ,  F02K1/82

Abstract: A duct 26 has circumferentially distributed features capable of scattering acoustic energy associated with fluid dynamic shocks 34 extending in a shock orientation direction D. Each feature is oriented, over at least a portion of its length, substantially perpendicular to the shock orientation direction. The features may be splices 42 used to connect segments of an acoustic liner 30, partitions 56 in a stability enhancing casing treatment 32, or other features capable of scattering acoustic energy associated with shocks.