| 摘要 |
PROBLEM TO BE SOLVED: To reduce emissions such as NOx by promoting mixture of air and fuel supplied from a main burner, and to prevent back fire.SOLUTION: A gas turbine combustor 1 comprises: a pilot burner 3 arranged along a central axis C of a heat chamber 2; multiple main burners 4 arranged to surround the pilot burner 3; multiple cylindrical premixing nozzles 12 provided to the multiple main burners 4 respectively and forming a first mixing zone 13 inside thereof; and an annular extension nozzle 18, which makes a loop continuing along circumferential direction of a pitch circle P of the premixing nozzles 12, having each outlet side of each premixing nozzle 12 connected thereto, a second mixing zone 21 formed inside thereof, and an outlet 20 opened to a downstream side. |
