초록

An axially asymmetric exhaust gas muffler has a perforated central exhaust duct that is circumscribed by a duality of reactive sound attenuating chambers in each of which is positioned a resonant sound attenuator.

대표청구항 ▼

A compact muffler for attenuating gas turbine engine noise, comprising: (a) a housing having a rectangular cross-section which circumscribes an axis; (b) an exhaust duct having a rectangular cross-section and extending coaxially through the interior of said housing, said exhaust duct having four sid

A compact muffler for attenuating gas turbine engine noise, comprising: (a) a housing having a rectangular cross-section which circumscribes an axis; (b) an exhaust duct having a rectangular cross-section and extending coaxially through the interior of said housing, said exhaust duct having four side walls, first and second ones of said side walls each having a perforated section; (c) a duality of baffle members extending between and intersecuring said housing and exhaust duct, and defining therewith first and second sound attenuating chambers each extending laterally around axial portions of at least two of said side walls, said first sound attenuating chamber communicating with the interior of said exhaust duct through a first portion of said perforated section of said first side wall, and said second sound attenuating chamber communicating with the interior of said exhaust duct through a first portion of said perforated section of said second side wall, each of said sound attenuating chambers extending axially beyond the portion of said perforated section through which it communicates with the interior of said exhaust duct; (d) a first latticed wall structure positioned within said first sound attenuating chamber and extending along a second portion of said perforated section of said first side wall, said first latticed wall structure defining a series of laterally extending sound attenuating cells each having an open laterally inner end communicating with the interior of said exhaust duct through a second portion of said perforated section of said first side wall, and a covered laterally outer end; and (e) a second latticed wall structure positioned within said second sound attenuating chamber and extending along a second portion of said perforated section of said second side wall, said second latticed wall structure defining a series of laterally extending sound attenuating cells each having an open laterally inner end communicating with the interior of said exhaust duct through a second portion of said perforated section of said second side wall, and a covered laterally outer end.