Fuel jetting nozzle assembly for use in gas turbine combustor

摘要

A fuel jetting nozzle assembly for use in a gas turbine combustor comprises a nozzle head secured to a head plate, a fuel jetting nozzle (10) secured to the nozzle head and having fuel jetting holes (17) opened to an inside of a combustion chamber, swirling vanes (16) disposed on an outer peripheral portion of the fuel jetting nozzle for supplying air (27) as an annular swirling flow in the combustion chamber of the combustor liner, the fuel jetting holes being formed at base portions of the swirling vanes, and a cooling member composed of a plurality of cooling holes (30) formed to a front end portion of the fuel jetting nozzle so as to introducing a portion of the air (31) into a forward portion of a central portion (18) of the front end portion of the nozzle jetting from an upstream side of the swirling vanes. The cooling member further comprises an air introducing pipe (32) disposed to the front end portion of the fuel jetting nozzle means and an air header (33) attached to an inner surface of the front end portion of the fuel jetting nozzle. The cooling member is substituted by a pipe member formed to the nozzle head for jetting a fuel (20) inside the fuel jetting nozzle and colliding the jetted fuel against an inner surface of the central portion of the front end portion of the fuel jetting nozzle so as to cool the central portion thereof. <IMAGE>