Aeromechanical injection system with primary anti-return valve

Details Aeromechanical injection system with primary anti-return valve Aeromechanical injection system with primary anti-return valve

F - Mech Eng,Light,Heat,Weapons

23

R

F23R 3/28 (2006.01) F23R 3/14 (2006.01)

Patent

CA 2393082

Injection system of a combustion chamber of a turbomachine comprising a fuel injection nozzle effecting the vaporization of the fuel in the combustion chamber and a mixer/deflector assembly coaxial with the said injection nozzle and which effects the mixing of the oxidizing agent/fuel blend and diffuses it in the combustion chamber, the said mixer/deflector assembly comprising a primary swirler (40) and a secondary swirler (42) disposed axially at a determined distance from one another and separated by a venturi device (44) disposed coaxially with the injection nozzle, the primary swirler being fixed solidarily to the injection nozzle and separated from the latter by a constant radial distance, determined in a manner such that the fuel vaporized by the injection nozzle can in no way impact the primary swirler. Preferentially, the venturi device has an interior surface (44A) presenting on an upstream part a discontinuity of slope P.

Système d'injection d'une chambre de combustion de turbomachine comportant une buse d'injection de carburant assurant la vaporisation du carburant dans la chambre de combustion et un ensemble mélangeur/déflecteur coaxial à cette buse d'injection et qui réalise le mélange comburant/carburant et le diffuse dans la chambre de combustion, cet ensemble mélangeur/déflecteur comportant une vrille primaire (40) et une vrille secondaire (42) disposés axialement à une distance déterminée l'un de l'autre et séparés par un dispositif à venturi (44) disposé coaxialement à la buse d'injection, la vrille primaire étant fixée solidairement à la buse d'injection et séparée de celle-ci d'une distance radiale constante, déterminée de telle sorte que le carburant vaporisé par la buse d'injection ne peut en aucune façon impacter sur la vrille primaire. De préférence, le dispositif à venturi comporte une surface interne (44A) présentant sur une partie amont une discontinuité de pente P.

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