FUEL NOZZLE, GAS TURBINE COMBUSTOR EQUIPPED WITH SAME, AND GAS TURBINE EQUIPPED WITH THIS GAS TURBINE COMBUSTOR

摘要

Provided are a fuel nozzle the tip of which can be cooled easily and at a reduced cost, a gas turbine combustor equipped with this fuel nozzle, and a gas turbine equipped with this gas turbine combustor. This fuel nozzle is equipped with: an inner tube (5); a burner tube (2), which is provided concentrically at the outer circumference of the tip of the inner tube (5) and which surrounds the tip part of the inner tube (5); an air passage (4) between the burner tube (2) and the inner tube (5) through which combustion air circulates; an open space (8) formed in the axial center of the inner tube (5) extending in the axial direction of the inner tube (5); multiple internal flow paths (9) provided at approximately equal intervals in the circumferential direction of the inner tube (5) and from the tips of which a fluid is sprayed; and at least one connecting part (10), which is provided upstream from the tip part of the inner tube (5) and extends radially inward from the outer wall of the inner tube (5), connecting with the open space (8). A portion of the combustion air flowing in the air passage (4) is guided from the connecting part (10) into the open space (8), and the combustion air is emitted from the tip part of the open space (8).