A cmc mixer having a structural outer cowling

Details A cmc mixer having a structural outer cowling A cmc mixer having a structural outer cowling

F - Mech Eng,Light,Heat,Weapons

02

K

F02K 1/38 (2006.01) F02K 1/48 (2006.01) F02K 1/80 (2006.01)

Patent

CA 2683168

The invention relates to a mixer (100) for the separated-flow nozzles of a turbojet, for mixing a hot inner flow from the turbojet combustion chamber with the cold outer flow from the turbojet fan. The mixer includes an inner shell (120) defining a flow channel for said hot inner flow, an outer shell (110) provided around the inner shell (120) and defining therewith a flow channel for said cold outer flow, and a lobe structure in which the lobes (1321, 1322) extend longitudinally from the trailing edges (HOa, 120a) of said shells. The lobe structure (130) is made of a ceramic-matrix composite material and is connected to the outer shell (110) by flexible connection tabs (140).

L'invention concerne un mélangeur (100) pour tuyère à flux séparés de turboréacteur destiné à mélanger un flux interne chaud issu de la chambre de combustion du turboréacteur avec un flux externe froid issu de la soufflante du turboréacteur. Le mélangeur comprend une virole interne (120) délimitant un canal d'écoulement pour ledit flux interne chaud, une virole externe (110) disposée autour de la virole interne (120) et délimitant avec cette dernière un canal d'écoulement pour ledit flux externe froid, et une structure à lobes (130) dont les lobes (1321, 1322) s'étendent longitudinalement à partir des bords de fuite (110a, 120a) desdites viroles. La structure à lobes (130), qui est réalisée en matériau composite à matrice céramique, est attachée à la virole externe (110) par des pattes de fixation souples (140).

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