COMBUSTION CHAMBER AND A METHOD OF MIXING FUEL AND AIR IN A COMBUSTION CHAMBER

摘要

A combustion chamber including a first fuel injector and a second fuel injector, the first and second fuel injectors being arranged to inject fuel into a mainstream flow of air with the second fuel injector arranged downstream of the first fuel injector. A method of mixing fuel and air in a combustion chamber, including injecting fuel into a mainstream flow of air with a first fuel injector; injecting fuel into the mainstream flow of air with a second fuel injector, which is arranged downstream of the first fuel injector; injecting fuel into the mainstream flow with the first fuel injector such that the resulting mixture between the first and second fuel injectors has an equivalence ratio less than the lean flame stability limit; and injecting fuel into the mainstream flow with the second fuel injector such that a combustion zone is provided downstream of the second fuel injector.

主权项

1. A combustion chamber comprising:
a first fuel injector and a second fuel injector, the first fuel injector and the second fuel injector each being arranged to inject fuel into a mainstream flow of air with the second fuel injector arranged downstream of the first fuel injector, the first fuel injector being configured to inject the fuel into the mainstream flow such that a resulting mixture between the first fuel injector and the second fuel injector has an equivalence ratio less than a lean flame stability limit, and the second fuel injector being configured to inject the fuel into the mainstream flow such that a combustion zone is provided downstream of the second fuel inj ector; an upstream end wall including an aperture, the second fuel injector being provided within the aperture in the upstream end wall of the combustion chamber; and an expanding cowl portion extending in an upstream direction from the upstream end wall of the combustion chamber towards a compressor exit, an upstream end of the expanding cowl portion being arranged downstream of a diffuser portion arranged upstream of the combustion chamber and downstream of the compressor exit, the expanding cowl portion being configured to receive the mainstream flow of air, the expanding cowl portion expanding in a cross-sectional area in a direction of the mainstream flow, the first fuel injector and the second fuel injector being provided within the expanding cowl portion, and the first fuel injector being disposed at an upstream portion of the expanding cowl portion and the second fuel injector being disposed at a downstream portion of the expanding cowl portion.