Method and apparatus to decrease gas turbine engine combustor emissions
AssigneeGeneral Electric Company
InventorsJohn D. Bibler, Timothy J. Held, Mark A. Mueller
Life of this patent
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Abstract
A method enables a gas turbine engine including a combustor to be operated. The combustor includes a mixer assembly including an air swirler, a premixer, a dome plate, and a heat shield. The method comprises discharging fluids from the air swirler into the premixer, and directing cooling fluids through a cooling opening defined in at least one of the swirler and the dome plate towards an upstream side of the heat shield for impingement cooling of the heat shield.
Claims20
A method for operating a gas turbine engine including a combustor, the combustor including at least one premixer assembly, a dome plate, and a heat shield, said method comprising:
- discharging fluids through an air swirler within the at least one premixer assembly;
- and
- directing cooling fluids through a cooling opening defined in at least one of the premixer assembly and the dome plate towards the heat shield for impingement cooling of the heat shield.
A mixer assembly for a gas turbine engine combustor, said mixer assembly comprising:
- a premixer,
- an air swirler for channeling fluid flow therethrough into said premixer;
- a dome plate extending downstream from said air swirler;
- and
- a heat shield extending downstream from at least one of said air swirler and said dome plate, said heat shield comprising a downstream side and an upstream side, at least one of said premixer and said dome plate comprising at least one cooling opening configured to receive cooling fluid for impingement cooling at least a portion of said heat shield.
A gas turbine engine combustor comprising a mixer assembly and a combustion chamber, said mixer assembly comprising a premixer, a dome plate, and a heat shield, said premixer comprising an air swirler for channeling fluid flow therethrough into said premixer, said dome plate extending downstream from said air swirler, said heat shield extending downstream from at least one of said air swirler and said dome plate, and comprising a downstream side and an upstream side, said downstream side between said combustion chamber and said upstream side, at least one of said premixer and said dome plate comprising at least one opening extending therethrough for discharging cooling fluid therefrom for impingement cooling at least a portion of said heat shield.
Dependencies are inferred from the claim text.