Ejector in an Overboard Bleed scheme for a gas turbine

A cooling circuit in a gas turbine includes an over board bleed (OBB) circuit (36) bleeding air from a last stage of the compressor, an extracted air circuit (38) extracting air from an upstream stage of the compressor, and an ejector (42) receiving input from the OBB circuit and the extracted air circuit. Ejector outlet flow from the ejector is communicated to the turbine.