A gas turbine combustor and fuel supply method for same

摘要

The present invention relates to a gas turbine combustor and a fuel supply method for the same, which can prevent flushing-back of a flame while reducing NOx emissions. In a gas turbine combustor for mixing fuel into combustion air introduced from a compressor (1), burning an air-fuel mixture, and supplying produced combustion gas to a gas turbine (3), the combustor (1) comprises a liquid fuel nozzle (13) for jetting out liquid fuel; a pre-mixture chamber wall (5) provided with the liquid fuel nozzle (13) at a center thereof, having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out from the liquid fuel nozzle, and defining a pre-mixture chamber (5) therein; a plurality of air inlet holes bored through the pre-mixture chamber wall (5) and introducing the combustion air to the pre-mixture chamber (4) such that angles at which the combustion air is introduced to the pre-mixture chamber (4) through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall (5); and a plurality of gaseous fuel nozzles (17) disposed around the pre-mixture chamber wall (5) in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.