A combustion chamber

Details A combustion chamber A combustion chamber

F - Mech Eng,Light,Heat,Weapons

23

R

F23R 3/02 (2006.01) F23R 3/04 (2006.01) F23R 3/28 (2006.01) F23R 3/34 (2006.01)

Patent

CA 2384336

A three-stage lean burn combustion chamber (28) comprises a primary combustion zone (36), a secondary combustion zone (40) and a tertiary combustion zone (44). Each of the combustion zones (36,40,44) is supplied with premixed fuel and air by respective fuel and air mixing ducts (54,70,92). The fuel and air mixing ducts (54,70,92) have a plurality of air injection slots (62,64,76,98) spaced apart transversely to the direction of flow through the fuel and air mixing ducts (54,70,92). The air injection slots (62,64,76,98) extend in the direction of flow through the fuel and air mixing ducts (54,70,92) to the reduce the magnitude of the fluctuations in the fuel to air ratio of the fuel and air mixture supplied into the at least one combustion zone (36,40,44). This reduces the generation of harmful vibrations in the combustion chamber (28).

Chambre de combustion à mélange pauvre en trois parties (28) qui comprend une zone de combustion primaire (36), une zone de combustion secondaire (40) et une zone de combustion tertiaire (44). Chaque zone de combustion (36, 40, 44) est alimentée en carburant prémélangé et en air par des conduits de mélange air-carburant (54, 70, 92). Les conduits de mélange air-carburant (54, 70, 92) ont plusieurs fentes d'injection d'air (62, 64, 76, 98) dispersées perpendiculairement à la direction de l'écoulement dans les conduits de mélange air-carburant (54, 70, 92). Les fentes d'injection d'air (62, 64, 76, 98) vont dans la direction de l'écoulement dans les conduits de mélange air-carburant (54, 70, 92) de façon à réduire l'ampleur des fluctuations du rapport air/carburant du mélange air-carburant qui pénètre dans au moins une des zones de combustion (36, 40, 44), réduisant ainsi la production de vibrations nuisibles dans la chambre de combustion (28).

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