| 摘要 |
PROBLEM TO BE SOLVED: To prevent smoke from happening by eliminating a stay of a fuel in a gas turbine combustor wherein the fuel injected from a spray hole at a center of a tip end surface of a nozzle is mixed with swirl air blown from a swirl flow passage located around the nozzle. SOLUTION: A cylindrical compartment wall 5 is provided between a nozzle 1 and a swirl flow passage 9 to form a first sub air passage 6, and a cap outer surface 11 of a nozzle cap 10 is formed, flushed with a cylindrical compartment wall outer surface and is coupled with a tip end of the cylindrical compartment wall. A gap is formed between a rear end surface 13 of the nozzle cap and the tip end surface 2 of the nozzle to form an annular second air passage 17 communicated with the first sub air passage. Cooling air introduced from an upstream side onto the first sub air passage passes through the second sub air passage and reaches an inlet 19 of a fuel injection guide 18 defining a cap inner surface 12, and flows along the cap inner surface.
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