Turbine engine comprising an exhaust-gas guide cone with a...

F - Mech Eng,Light,Heat,Weapons – 02 – K

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F02K 1/82 (2006.01)

Patent

CA 2761601

The present invention relates to a gas turbine engine, in which gases flow upstream to downstream, including a combustion chamber, a high-pressure turbine placed downstream from the combustion chamber, arranged so as to receive combustion gases from said combustion chamber, a free turbine, and an exhaust-gas guide cone (7) attached to said free turbine downstream from the latter, the turbine engine emitting sound waves during operation. The turbine engine is characterised in that the guide cone (7) includes a sound suppressor, in particular with a Helmholtz resonator structure, with a resonant cavity (71) and a resonator neck (75) in communication with an opening (76), arranged so as to suppress the sound waves emitted by the turbine engine.

La présente invention porte sur un turbomoteur à gaz, dans lequel circulent des gaz d'amont en aval, comprenant une chambre de combustion, une turbine haute pression disposée en aval de la chambre de combustion agencée pour recevoir des gaz de combustion issus de ladite chambre de combustion, une turbine libre, et un cône (7) de guidage des gaz d'échappement fixé à ladite turbine libre en aval de cette dernière, le turbomoteur émettant des ondes sonores au cours de son fonctionnement. Le turbomoteur est caractérisé par le fait que le cône de guidage (7) comprend un atténuateur sonore, présentant en particulier une structure de résonateur d'Helmholtz avec une cavité de résonance (71) un col de résonance (75) débouchant dans un orifice (76), agencé pour atténuer les ondes sonores émises par le turbomoteur.

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