초록 ▼

A combustor for a gas turbine engine operates with high combustion efficiency and low carbon monoxide, nitrous oxide, and smoke emissions during low, intermediate, and high engine power operations is described. The combustor includes a mixer assembly including a pilot mixer and a main mixer. The pil

A combustor for a gas turbine engine operates with high combustion efficiency and low carbon monoxide, nitrous oxide, and smoke emissions during low, intermediate, and high engine power operations is described. The combustor includes a mixer assembly including a pilot mixer and a main mixer. The pilot mixer includes a pilot fuel injector, at least one swirler, and an air splitter. The main mixer extends circumferentially around the pilot mixer and includes a plurality of fuel injection ports and a conical air swirler upstream from the fuel injection ports. During idle engine power operation, the pilot mixer is aerodynamically isolated from the main mixer, and only air is supplied to the main mixer. During increased power operations, fuel is also supplied to the main mixer, and the main mixer conical swirler facilitates radial and circumferential fuel-air mixing to provide a substantially uniform fuel and air distribution for combustion.

대표청구항 ▼

1. 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 and a main mixer, the pilot mixer including a pilot fuel nozzle and a plurality of axial swirlers, the main mixer including a main swirler

1. 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 and a main 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, said method comprising the steps of:injecting fuel into the combustor through the pilot mixer, such that the fuel discharged downstream from the pilot mixer axial swirlers; and directing airflow into the combustor through the main mixer such that the airflow is swirled with an axial swirler prior to swirling the airflow with at least one of a conical swirler and a cyclone swirler prior to being discharged from the main mixer.