Patent ID: 7967556

Claim:
A turbomachine comprising: at least one stator and at least one downstream rotor, with the stator comprising stationary stator vanes and the rotor comprising several rotor blades attached to a rotating shaft, a casing confining in an outward direction, a passage of a main flow path of fluid through the rotor and the stator, the stator and rotor acting to increase pressure of the fluid along the main flow path, a passageway for the supply of peripheral jet fluid, the passageway passing through the casing and radially inwardly through a root of a vane of the stator mounted within the casing, the passageway connecting to a source of peripheral jet fluid from the main flow path at a point downstream of the at least one downstream rotor where a pressure of the fluid is greater than at the at least one stator; and a nozzle positioned in the stator vane and connected to the passageway to receive the peripheral jet fluid, the nozzle having an exit opening positioned to issue the peripheral jet fluid at or upstream of a trailing edge of an aerofoil portion of the stator vane at a radially outer boundary of a main flow path to create a peripheral jet generally parallel with a radially outer flow of the main flow path; wherein an angle of the nozzle is variable together with the vane of the stator.