F - Mech Eng,Light,Heat,Weapons – 23 – R
Patent
F - Mech Eng,Light,Heat,Weapons
23
R
F23R 3/14 (2006.01) F23C 7/00 (2006.01) F23D 17/00 (2006.01) F23R 3/28 (2006.01) F23R 3/34 (2006.01)
Patent
CA 2420313
An injection system (12) for injecting an air/fuel mixture into a combustion chamber of a gas turbine engine, the injection system having a longitudinal axis and comprising fuel injection means, interposed between first (22) and second air injection (24) means, the fuel injection means being disposed in an annular internal cavity of a Venturi (26), the fuel injection means comprising at least a first fuel admission circuit (32) provided with at least one fuel injection orifice (36), and a plurality of second fuel admission circuits (34) independent from the first fuel admission circuit(s) (38), each being provided with at least one fuel injection orifice so as to define a plurality of independent modes of injecting the air/fuel mixture depending on determined operating speeds of the engine, the fuel injection orifice (36) of the first fuel admission circuit (28) being formed in the upstream wall of the Venturi so as to inject fuel towards the combustion chamber in a general direction that is substantially perpendicular to a flow of air coming from the first air injection means, and the fuel injection orifices (38) of the second fuel admission circuits being formed in the downstream wall (30) of the Venturi so as to inject fuel towards the combustion chamber in a general direction that is substantially perpendicular to a flow of air coming from the second air injection means.
Système d'injection (12) d'un mélange air/carburant dans une chambre de combustion d'un moteur à turbine à gaz, le système d'injection comportant des moyens d'injection de carburant interposés entre des premiers (22) et des seconds moyens d'injection d'air (24), les moyens d'injection de carburant étant disposés dans une cavité interne annulaire d'un venturi (26), les moyens d injection de carburant comportant au mains un premier circuit d'admission de carburant (32) muni d'au moins un orifice d injection de carburant (36), et une pluralité de seconds circuits d'admission de carburant (34), indépendants des premiers, munis chacun d'au moins un orifice d injection de carburant (38) de façon à définir une pluralité de modes indépendants d'injection du mélange air/carburant selon des régimes déterminés de fonctionnement du moteur, l'orifice d'injection de carburant (36) du premier circuit d'admission de carburant étant pratiqué dans une paroi amont (28) du venturi afin d'injecter du carburant vers la chambre de combustion selon une direction générale sensiblement perpendiculaire à un flux d'air issu des premiers moyens d'injection d'air, et les orifices d'injection de carburant (38) des seconds circuits d'admission de carburant étant pratiqués dans une paroi aval (30) du venturi afin d'injecter du carburant vers la chambre de combustion selon une direction générale d'injection sensiblement perpendiculaire à un flux d'air issu des seconds moyens d injection d'air.
Calvez Gwenaelle
Feder Didier
Michau Marion
Ravet Frederic
Rodrigues Jose
Goudreau Gage Dubuc
Snecma
Snecma Moteurs
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