公开(公告)号：US09915201B2

公开(公告)日：2018-03-13

申请号：US14140959

申请日：2013-12-26

Applicant: Rolls-Royce Corporation

Inventor： Michael Abraham Karam ,  Craig Heathco ,  Andrew Eifert

IPC: F02C6/16 ,  F02C7/045 ,  F02C3/13 ,  F02C6/14 ,  F02C7/27 ,  F02K3/12 ,  F02C3/30 ,  F02C6/08 ,  F02C6/04 ,  F02C9/18 ,  F02C7/262 ,  F02C9/52 ,  F02C1/02 ,  F02C6/06 ,  F02C7/26 ,  F02C9/50

CPC classification number: F02C7/045 ,  F02C1/02 ,  F02C3/13 ,  F02C3/305 ,  F02C6/04 ,  F02C6/06 ,  F02C6/08 ,  F02C6/14 ,  F02C6/16 ,  F02C7/26 ,  F02C7/262 ,  F02C7/27 ,  F02C9/18 ,  F02C9/50 ,  F02C9/52 ,  F02K3/12 ,  F05B2260/42 ,  F05B2270/103 ,  F05B2270/1031 ,  F05B2270/1033 ,  F05B2270/1073 ,  F05B2270/111 ,  F05D2260/42 ,  F05D2260/963 ,  F05D2270/05 ,  F05D2270/051 ,  F05D2270/093 ,  F05D2270/13 ,  F05D2270/3061

Abstract: A gas turbine engine is disclosed which includes a bypass passage that in some embodiments are capable of being configured to act as a resonance space. The resonance space can be used to attenuate/accentuate/etc a noise produced elsewhere. The bypass passage can be configured in a number of ways to form the resonance space. For example, the space can have any variety of geometries, configurations, etc. In one non-limiting form the resonance space can attenuate a noise forward of the bypass duct. In another non-limiting form the resonance space can attenuate a noise aft of the bypass duct. Any number of variations is possible.