Abstract: A system for ventilating a downstream cavity of an impeller of a centrifugal compressor in a turbomachine, this cavity being delimited by the downstream face of the impeller and by an annular end-piece of a diffuser and being ventilated by taking air from the outlet of the compressor, the system comprising at least one annular deflector mounted in this cavity in order to oppose the rise of hot air along the downstream face of the impeller and in order to cause the diverted hot air to be driven by the air taken from the outlet of the compressor.

Abstract: System for cooling a downstream cavity of a centrifugal compressor impeller in a turbomachine, this compressor being connected to a diffuser comprising a downstream annular flange, an annular plating being mounted coaxially around the flange of the diffuser and substantially extending over the entire axial dimension of the flange so as to define an annular ventilation passage fed with air which is cooler than the air exiting the centrifugal compressor.

Abstract: A system for ventilating a downstream cavity of an impellor of a centrifugal compressor in a turbomachine, this system including flow diversion system mounted fixedly in the downstream cavity of the impellor in order to divert the ventilation air taken from the outlet of the compressor and cause it to circulate radially from the inside to the outside along the downstream face of the impellor.

Abstract: A system for ventilating a downstream cavity of an impeller of a centrifugal compressor in a turbomachine, this cavity being delimited by the downstream face of the impeller and by an annular end-piece of a diffuser and being ventilated by taking air from the outlet of the compressor, the system comprising at least one annular deflector mounted in this cavity in order to oppose the rise of hot air along the downstream face of the impeller and in order to cause the diverted hot air to be driven by the air taken from the outlet of the compressor.

Abstract: A system for ventilating a downstream cavity of an impellor of a centrifugal compressor in a turbomachine, this system comprising flow diversion means (70, 84) mounted fixedly in the downstream cavity (38) of the impellor (36) in order to divert the ventilation air taken from the outlet of the compressor (10) and cause it to circulate radially from the inside to the outside along the downstream face (34) of the impellor.

Abstract: System for cooling a downstream cavity of a centrifugal compressor impeller in a turbomachine, this compressor (10) being connected to a diffuser (12) comprising a downstream annular flange, an annular plating (70) being mounted coaxially around the flange of the diffuser and substantially extending over the entire axial dimension of the flange so as to define an annular ventilation passage (72) fed with air which is cooler than the air (61) exiting the centrifugal compressor.