TURBOMACHINE COMPRISING A SYSTEM FOR COOLING THE DOWNSTREAM FACE OF AN IMPELLER OF A CENTRIFUGAL COMPRESSOR

摘要

A turbomachine comprising a diffuser-distributor assembly (12) comprising a downstream end-piece (30) connected at its downstream end to means (36) for injecting air for ventilating a turbine and delimiting with the impeller (18) of a centrifugal compressor an annular cavity (41) for the circulation of ventilation air taken from the outlet of the compressor, this turbomachine comprising means for taking air from the injection means (36) and means for guiding this air to the radially internal portion of the downstream face (40) of the impeller.