COMBUSTOR AND GAS TURBINE

摘要

An object is to realize combustion flame which can further reduce the amount of NOx generation. A combustor (14) includes a pilot nozzle (40); a plurality of main nozzles (44) arranged apart from the pilot nozzle (40) in the circumferential direction on the outer peripheral side of the pilot nozzle (40) and configured to perform premix combustion; a combustor basket (34) surrounding the pilot nozzle (40) and each main nozzle (44); an outlet outer ring (50) provided at a tip end of the combustor basket (34); and a combustion liner (36) fitted, at an inner surface thereof, onto the outer periphery of the combustor basket (34) and surrounding the outlet outer ring (50). The outlet outer ring (50) is formed parallel to an inner wall surface (66) of the combustion liner (36).

主权项

1. A combustor comprising:
a pilot nozzle; a plurality of main nozzles arranged apart from the pilot nozzle in a circumferential direction on an outer peripheral side of the pilot nozzle and configured to perform premix combustion; a combustor basket surrounding the pilot nozzle and each main nozzle; a ring provided at a tip end of the combustor basket; and a combustion liner fitted, at an inner surface thereof, onto an outer periphery of the combustor basket and surrounding the ring, wherein the ring is formed parallel to an inner wall surface of the combustion liner, or is formed such that an inner diameter thereof decreases toward a downstream side of a flow of premixed gas, wherein an outer diameter of the ring decreases toward an end portion of the ring.