Patent ID: 6675581
Filing Date: 2004-01-13
Classification: F23D,F23R

Abstract:
A premix fuel nozzle for use in a gas turbine comprising:a base; a first tube having a first outer diameter, a first inner diameter, a first thickness, and opposing first tube ends, said base fixed to said first tube at one of said first tube ends; a second tube coaxial with said first tube and having a second outer diameter, a second inner diameter, a second thickness, and opposing second tube ends, one of said second tube ends adjacent said base, said second outer diameter smaller than said first inner diameter thereby forming a first annular passage between said first and second tubes; a third tube coaxial with said second tube and having a third outer diameter, a third inner diameter, a third thickness, and opposing third tube ends, one of said third tube ends adjacent said base, said third outer diameter smaller than said second inner diameter thereby forming a second annular passage between said second and third tubes, said third tube having a third passage contained within said third inner diameter; an injector assembly fixed to each of said first, second, and third tubes at said tube ends opposite said base, said injector assembly having a plurality of radially extending fins, each of said fins having an outer surface, an axial length, a radial height, and a circumferential width, a first radially extending slot within said fin and a second radially extending slot within said fin, a set of first injector holes located in the outer surface of each of said fins and in fluid communication with said first slot therein, a set of second injector holes located in the outer surface of each of said fins and in fluid communication with said second slot therein, and a fin cap fixed to the radially outermost portion of the outer surface of said fin to enclose said slots; a cap assembly fixed to said injector assembly and comprising an effusion plate having an end surface including a set of third injector holes therein; wherein each of said first slots is in fluid communication with said first passage and each of said second slots is in fluid communication with said second passage.