| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas turbine combustor enabling low NOx combustion even by using gas fuel in which hydrogen concentration varies. SOLUTION: The gas turbine combustor includes a plurality of multiport coaxial jet burners in which a plurality of fuel nozzles 56 and a plurality of air holes 55 provided in an air plate 54 to correspond to the respective fuel nozzles 56 are coaxially arranged. Each of the multiport coaxial jet burners includes a first coaxial jet burner part disposed on an inner peripheral side which is a central part of the multiport coaxial jet burner and a second coaxial jet burner part disposed on an outer peripheral side which is the outer periphery of the multiport coaxial jet burner. The diameter of the air holes 55 provided on the air plate 54 forming the coaxial jet burner of the first coaxial jet burner part is formed smaller than that of the air holes 55 provided on the air plate 54 forming the coaxial jet burner of the second coaxial jet burner part. Combustion for carrying out flame holding of the gas turbine combustor is performed by the first coaxial jet burner part, and low NOx combustion is performed by the second coaxial jet burner part disposed on the outer peripheral side. COPYRIGHT: (C)2011,JPO&INPIT
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