F - Mech Eng,Light,Heat,Weapons – 02 – K
Patent
F - Mech Eng,Light,Heat,Weapons
02
K
F02K 1/40 (2006.01)
Patent
CA 2460549
The invention relates to a device for mixing two flows of fluid, which are initially guided separate from one another, in a two-circuit reaction engine. To this end, a mixing tube is provided which encircles a hot central stream, and a cold bypass flow flows outside along the lateral surface of said mixing tube. The mixing tube is provided in the form of a truncated cone that narrows in the direction of now and has openings at the downstream and in the peripheral direction of the mixing tube surface. Said openings are located in a cross-sectional plane that is perpendicular to the longitudinal axis of the mixing tube, and the hot central stream flowing through the mixing tube penetrates, via the openings, the cold bypass stream flowing around the mixing tube surface. The openings have elliptical passage surfaces with a major axis and a minor axis, whereby the major axis of the passage surfaces on the lateral surface of the mixing tube run in the direction of flow of the fluids, and the minor axis runs perpendicular thereto.
La présente invention concerne un dispositif pour mélanger deux courants fluidiques (16, 18) qui sont à l'origine conduits de manière séparée dans un moteur à réaction. Un tuyau de mélange (10) entoure un faisceau central très chaud (16) et un courant secondaire froid (18) s'écoule sur la surface de revêtement profilée externe (12) de ce tuyau de mélange. Ledit tuyau de mélange (10) se présente sous forme d'un cône tronqué qui se resserre dans la direction d'écoulement (S) et comprend, à l'extrémité en aval, dans la direction périphérique du revêtement (12) du tuyau de mélange, des ouvertures (20) qui sont situées dans un plan de section transversale perpendiculaire à l'axe longitudinal (14) du tuyau de mélange (10). Ces ouvertures permettent de faire pénétrer le faisceau central très chaud (16) qui traverse le tuyau de mélange (10) dans le courant secondaire froid (18) qui s'écoule autour du revêtement (12) du tuyau de mélange. Lesdites ouvertures (20) présentent des surfaces de transit à profil elliptique (22) qui comprennent un axe principal (24) et un axe secondaire (26). Ledit axe principal (24) des surfaces de transit (22) à la surface de revêtement (12) du tuyau de mélange (10) s'étend dans la direction d'écoulement (S) des fluides (16, 18) et l'axe secondaire (26) s'étend perpendiculairement à celle-ci.
Kirby Eades Gale Baker
Mtu Aero Engines Gmbh
LandOfFree
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