Turbine rotor for a gas turbine engine

1. A turbine rotor for a gas turbine engine, said turbine rotor comprising:

an upstream turbine disk passed through by a first ventilation flow;

a downstream turbine disk passed through by a second ventilation flow;

an annular flange;

a first ferrule connecting the upstream turbine disk to the annular flange;

a second ferrule connecting the downstream turbine disk to the annular flange;

an air flow separator device;

wherein the air flow separator device includes

a first part, forming a first ring, arranged between the upstream turbine disk and the downstream turbine disk;

a second part, forming a second ring, said second part having a first portion facing the downstream turbine disk, and a second portion arranged between the first ferrule and the second ferrule; and

a thermal insulation area arranged between the first part and the second part, the thermal insulation area, together with the first part and the second part, forming a physical barrier between the first ventilation flow cooling the upstream disk and the second ventilation flow cooling the downstream disk, said physical barrier dissociating said first and second ventilation flows.

2. The turbine rotor according to claim 1 , wherein the thermal insulation area is a space filled with air.

3. The turbine rotor according to claim 1 , wherein the thermal insulation area is arranged between a lower part of the first part and an upper part of the second part, and is facing the second ferrule.

4. The turbine rotor according to claim 1 , wherein the first part of the air flow separator device and the second part of the air flow separator device are a single piece.

5. The turbine rotor according to claim 1 , wherein the first part of the air flow separator device and the second part of the air flow separator device are separate pieces.

6. The turbine rotor according to claim 5 , wherein the first part of the air flow separator device is a labyrinth seal, where the labyrinth seal includes at least one lip.

7. The turbine rotor according to claim 6 , wherein a first portion of the first part is supported against the upstream disk, a second portion of the first part is supported against the first portion of the second part, said first portion of the second part being configured to hold the first part radially.

8. The turbine rotor according to claim 1 , wherein the annular flange maintains connection between the first ferrule, the second ferrule and the second part of the air flow separator device.

9. A turbomaehine comprising the turbine rotor according to claim 1 .

10. An aircraft comprising the turbine rotor according to claim 1 .