FUSE FOR REDUCING FLAME HOLDING IN PREMIXER OF COMBUSTION CHAMBER OF GAS TURBINE, AND THE RELATED METHOD

PROBLEM TO BE SOLVED: To provide a fuel nozzle assembly (34) for a combustor(18) of a gas turbine. SOLUTION: The fuel nozzle assembly (34) includes a nozzle body (40) having a front part (46) adjacent to a combustion section (30) of the combustor and an inner tube (69) forming a fuel passage (68) penetrating the nozzle body, an outside casing (78) which is an outside casing around the inner tube for forming an air passage (76) between the inner tube and itself, a gas conducting pipe (56) arranged in the air passage and having an outlet (66) near the front part of the nozzle body for letting fuel start flowing through the conducting pipe which can expand only after a flashback state occurs in the combustor, and premixed fuel passages (70, 71) and ports (61, 62) for discharging the fuel to a premixing area of the combustor. The gas conducting pipe comprises an inlet opening to the premixed fuel passage. COPYRIGHT: (C)2010,JPO&INPIT