Gas turbine with an exhaust gas diffuser and support ribs

The turbine (10) has an exhaust gas diffuser (21) connected to a turbine unit (24). An inflow-side annular diffuser channel (33) is limited by a conical channel wall (40). Inward extending hollow support ribs (35) are provided at the channel for fastening a radial bearing (51). A blow line (47) for blow air, is led into the diffuser. An inflow side end of the blow line is connected with an axial-flow turbo compressor (18). An outflow-side end of the blow line is fluidically connected with a cavity of the ribs. The ribs comprise apertures (49) for blowing the blow air into the channel.