Dual flow turbine engine muffler

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 25/30 (2006.01) F01N 1/02 (2006.01) F02K 1/82 (2006.01)

Patent

CA 2072118

An elongate exhaust gas muffler (10) for a turbine engine includes a foraminous central exhaust duct (12) which is circumscribed along its length by a plurality of tuned dissipative and reactive noise attenuation chambers (42-48). At an inlet end (16) of the muffler (10) an annular secondary flow inlet (32) is defined about the central exhaust duct and opens to the first sound attenuation chamber (42). A secondary flow of pressurized bleed air is receivable into the first attenuation chamber (42) in the muffler (10).

Un silencieux allongé (10) pour les gaz d'échappement d'un réacteur à turbine comporte un conduit d'échappement central à perforations (12) entouré longitudinalement par une pluralité de chambres de dissipation et d'atténuation du bruit du réacteur (42-48). A l'extrémité d'entrée (16) du silencieux (10) est disposée une entrée annulaire d'écoulement secondaire (31) qui est aménagée autour du conduit d'échappement central et débouche sur la première chambre d'atténuation sonore (42). Un deuxième écoulement d'air de prélèvement pressurisé peut passer dans la première chambre d'atténuation (42) du silencieux (10).

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