Mixer for separate-flow nozzle

Details Mixer for separate-flow nozzle Mixer for separate-flow nozzle

F - Mech Eng,Light,Heat,Weapons

02

K

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

Patent

CA 2582028

The invention relates to a mixer for a separate-flow nozzle of a turbojet engine, said mixer comprising, following a longitudinal axis (X-X'), a fixing collar (10) for connecting the mixer to the exhaust housing of the nozzle, and a lobe structure (20) comprising a succession of inner lobes (22) and outer lobes (21) which are peripherally distributed about the longitudinal axis (X- X') of the mixer. The lobe structure (20) consists of a ceramic matrix composite material, and comprises a mid-span snubber (30) forming a connection between the inner lobes of the structure. In this way, the main part of the mixer, that is the lobe structure, consists of a ceramic matrix composite material, which enables the mass of the mixer, and thus the nozzle, to be significantly reduced.

Mélangeur pour tuyère à flux séparés de turboréacteur comprenant, suivant un axe longitudinal (X-X'), une virole de fixation (10) pour raccorder le mélangeur au carter d'échappement de la tuyère et une structure à lobes (20) comportant une succession de lobes internes (22) et externes (21) répartis de façon circonférentielle autour de l'axe longitudinal (X-X') du mélangeur. La structure à lobes (20) est réalisée en matériau composite à matrice céramique et comprend en outre un anneau raidisseur (30) qui forme une liaison entre les lobes internes de la structure. Ainsi, la majeure partie du mélangeur, à savoir la structure à lobes, est réalisée en un matériau composite à matrice céramique, ce qui permet de diminuer de façon significative la masse du mélangeur et, par conséquent, celle de la tuyère.

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