System for ventilating a wall of a combustion chamber

摘要

The system has an annular casing (90) arranged radially between a combustion chamber (14) and a flange (26) of a diffuser (12). The casing extends axially from the diffuser to neighborhood of an outlet of the chamber and downstream of the flange. The casing has an outer radial wall (92) guiding an air flow that exits the diffuser, along an inner radial wall (46) of the chamber. The casing has an inner radial wall (94) delimiting, with the flange, an annular path (88) for passage of air exiting the diffuser. The casing is formed of two semi-shells assembled with each other transversally.