Centrifugal radial turbine

Centrifugal radial turbine, comprising:

• a fixed containment case (2);
• at least one support disc (3, 4) having a first face (9, 15) bearing at least one radial rotor stage (10, 11, 12, 13, 16, 17, 18, 19) formed by an array of blades (14, 20) arranged in succession along a respective circular path;
• and
• at least one rotation shaft (5, 7) integral with the respective disc (3, 4);
• wherein said at least one radial rotor stage (10, 11, 12, 13, 16, 17, 18, 19) is situated in an expansion volume (31) for a work fluid,
• wherein said at least one disc (3, 4) has through induction channels (25, 28) situated in radially external position with respect to the respective shaft (5, 7) and radially internal position with respect to said at least one radial rotor stage (10, 11, 12, 13, 16, 17, 18, 19),
• wherein said at least one disc (3, 4) is free to rotate together with the respective shaft (5, 7) around a rotation axis (X-X) under the action of the work fluid entering through the through induction channels (25, 28), and
• wherein, at the respective through induction channels (25, 28), said at least one disc (3, 4) comprises a plurality of induction rotor blades (26, 29) of at least one respective axial rotor stage (27, 30).