Patent ID: 7614234

Claim:
A turbomachine combustion chamber comprising: an inner annular wall of longitudinal axis; an outer annular wall centered on the longitudinal axis and surrounding the inner wall so as to co-operate therewith to define an annular space forming a combustion area; a transverse annular wall transversely interconnecting an upstream longitudinal end of the inner wall and an upstream longitudinal end of the outer wall; and a plurality of fuel injection systems; wherein: the inner wall includes a plurality of inner steps that are regularly distributed around the longitudinal axis, each inner step extending longitudinally between the upstream longitudinal end and a downstream longitudinal end of the inner wall and radially towards the outside thereof, the circumferential spacing between two adjacent inner steps defining an inner cavity; the outer wall includes a plurality of outer steps that are regularly distributed around the longitudinal axis, each outer step extending longitudinally between the upstream longitudinal end and a downstream longitudinal end of the outer wall and radially towards the inside thereof, the circumferential spacing between two adjacent inner steps defining an outer cavity; and the combustion chamber is configured to feed air external to the combustion chamber to at least one of the inner cavities and at least one of the outer cavities in a common direction that is substantially circumferential, and the fuel injection systems are configured to feed fuel to at least one of the inner cavities and at least one of the outer cavities in a direction that is substantially radial.