Patent ID: 6418726
Filing Date: 2002-07-16
Classification: F23R

Abstract:
A method for operating a gas turbine engine to facilitate reducing an amount of emissions from a combustor including a mixer assembly including a pilot mixer, a main mixer, and a mid-power and cruise mixer, the pilot mixer including a pilot fuel nozzle and a plurality of axial swirlers, the main mixer including a main swirler and a plurality of fuel injection ports, the mid-power and cruise mixer including a mixer and a plurality of fuel injection ports, said method comprising the steps of:injecting fuel into the combustor through the pilot mixer, such that the fuel is discharged downstream from the pilot mixer axial swirlers; directing airflow into the combustor through the main mixer such that the airflow is swirled with at least one of a conical swirler and a cyclone swirler prior to being discharged from the main mixer; and directing airflow between the pilot mixer and the main mixer through the mid-power and cruise mixer.