Patent ID: 8152445

Claim:
A fluid flow machine, comprising: a hub which is rotatable about a machine axis; a casing wall; a flow duct for fluid confined by the hub and the casing wall; a fluid supply chamber positioned in at least one of an area of the casing wall and an area of the hub; at least one row of rotor blades attached to the hub and positioned in the flow duct for adding energy to the fluid in the flow duct; a bore positioned along the flow duct axially between a leading edge and a trailing edge of the hub in at least one of the casing wall and the hub; the bore in flow connection with the fluid supply chamber, a separate injector insert positioned in the bore and extending radially into the flow duct, the injector insert in flow connection with the fluid supply chamber, the injector insert including an injector nozzle for supplying fluid from the fluid supply chamber into the flow duct, the injector insert being closely connected to a wall of the fluid supply chamber, the injector insert also being a separate component from blade and vane components.