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In a pilot burner fuel nozzle for a premixed type combustor, diffusion pilot fuel injection ports (fuel holes 101) are disposed unevenly in the circumferential direction, whereby a nonuniform pilot flame is formed in the circumferential direction in the premixed type combustor. Thereupon, the heat i

In a pilot burner fuel nozzle for a premixed type combustor, diffusion pilot fuel injection ports (fuel holes 101) are disposed unevenly in the circumferential direction, whereby a nonuniform pilot flame is formed in the circumferential direction in the premixed type combustor. Thereupon, the heat is distributed in the axial direction, so that oscillated combustion does not occur, by which stable combustion can be maintained.

대표청구항 ▼

[ We claim:] [1.] A premixed type combustor, comprising:a combustor chamber;an elongate pilot fuel nozzle within said combustor chamber; anda plurality of main fuel nozzles arranged peripherally with respect to said pilot fuel nozzle and operative to form a premixed gas within said combustor chamber

[ We claim:] [1.] A premixed type combustor, comprising:a combustor chamber;an elongate pilot fuel nozzle within said combustor chamber; anda plurality of main fuel nozzles arranged peripherally with respect to said pilot fuel nozzle and operative to form a premixed gas within said combustor chamber,said elongate pilot fuel nozzle having a plurality of fuel injection ports unevenly spaced circumferentially around the elongate axis of said pilot fuel nozzle so that said pilot fuel nozzle is operative to provide a pilot flame that is unevenly circumferentially arranged around said elongate axis so that said pilot flame causes a first portion of said premixed gas in a first region of said combustor chamber to burn with a short flame and a second portion of said premixed gas in a second region of said combustor chamber to burn with a long flame, whereby heat is distributed in the direction of said elongate axis to diminish oscillated combustion. [3.] The premixed type combustor of claim 1, further comprising a cone within said combustor chamber, wherein said pilot fuel nozzle is positioned within said cone and said main fuel nozzles are external of said cone and arranged peripherally with respect to said cone.