Soundproof exhaust pipe for a turbine engine

Details Soundproof exhaust pipe for a turbine engine Soundproof exhaust pipe for a turbine engine

F - Mech Eng,Light,Heat,Weapons

02

K

F02K 1/82 (2006.01)

Patent

CA 2750130

The invention relates to a soundproof exhaust pipe for a turbine engine, comprising a perforated inner housing (30) defining an outflowing jet (12) and a solid outer housing (20), the inner and outer housings defining a space therebetween, said space being closed at the upstream and downstream ends thereof. A web (60) extends between the inner and outer housings at a distance therefrom and comprises at least one sound energy-dissipating layer made of hollow beads supported against each other. A framework (40) with upstream and downstream portions connected together by beams supports the web and partitions the same into a plurality of boxes filled with hollow beads maintained between perforated textures (60a, 60b), the framework being connected to the outer housing (20) and/or the inner housing (30) at at least one of the upstream and downstream portions thereof.

Le conduit d'échappement insonorisé de turbomoteur comporte une enveloppe intérieure perforée (30) définissant une veine (12) d'écoulement et une enveloppe extérieure pleine (20), les enveloppes intérieure et extérieure définissant entre elles un espace fermé aux extrémités amont et aval dudit espace. Une âme (60) s'étend entre les enveloppes intérieure et extérieure, à distance de celles-ci et renferme au moins une couche dissipatrice d'énergie sonore formée de billes creuses maintenues les unes contre les autres. Une armature (40) avec des parties amont et aval reliées entre elles par des longerons supporte l'âme et réalise une compartimentation de celle-ci en plusieurs caissons remplis de billes creuses maintenues entre des textures ajourées (60a, 60b), l'armature étant solidaire de l'enveloppe extérieure (20) et/ou de l'enveloppe intérieure (30) à l'une au moins de ses parties amont et aval.

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