| 摘要 |
<p>A burner, a gas turbine combustor, a burner cooling method, and a burner modifying method, which can hold metal temperature at a nozzle surface (18) within a proper range and can increase reliability even when mixed fuel containing at least one of hydrogen and carbon monoxide is used as fuel. In a burner (13) for injecting mixed gas fuel containing at least one of hydrogen and carbon monoxide into a combustion chamber of a gas turbine combustor, the burner (13) comprises a fuel nozzle (15) for startup from which liquid fuel is injected into the combustion chamber, a mixed fuel nozzle (16) disposed around the fuel nozzle (15) for startup and injecting the mixed gas fuel, an air swirler (17) disposed at a downstream end of the mixed fuel nozzle (16) and having a plurality of flow passages (17a) from which a part of compressed air from a compressor (2) is injected into the combustion chamber, the mixed fuel nozzle (16) having injection ports (16a) disposed in the inner peripheral side of the flow passages (17a) of the air swirler (17), and cooling holes (53) formed in a nozzle surface (18) positioned to face the combustion chamber and introducing a part of the mixed gas fuel injected from the mixed fuel nozzle (16) into the combustion chamber.
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