Patent ID: 7891190

Claim:
A combustion chamber of a turbomachine, comprising: at least one bowl with a substantially frustoconical wall flared in a downstream direction and provided with an annular row of air injection orifices which are uniformly distributed around an axis of the bowl, and a cylindrical rim connected at a downstream end of the frustoconical wall that is mounted axially in an opening of a chamber endwall with an annular deflector downstream from the endwall; and a fuel injector arranged upstream of the bowl and in the axis thereof which produces an annular layer of an air/fuel mixture injected downstream of the bowl, wherein the annular row of air injection orifices comprises smaller-diameter orifices and larger-diameter orifices which are arranged in alternating fashion and with a uniform distribution around the axis of the bowl to produce two annular air/fuel mixture layers which are coaxial and have different opening angles.