Methods and apparatus for decreasing combustor emissions
AssigneeGeneral Electric Company
InventorsArthur Wesley Johnson, Robert Andrew Wade, David Louis Burrus
Life of this patent
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Abstract
A combustor for a gas turbine engine operates with high combustion efficiency, and low nitrous oxide emissions during engine operations. The combustor includes at least one trapped vortex cavity, a fuel delivery system including two fuel circuits, and a fuel spray bar assembly. A pilot fuel circuit supplies fuel to the trapped vortex cavity and a main fuel circuit supplies fuel to the combustor. The fuel spray bar assembly includes a spray bar and a heat shield. The spray bar is sized to fit within the heat shield. The heat shield includes aerodynamically-shaped upstream and downstream sides.
Claims20
A method for assembling a combustor for a gas turbine engine, the combustor including a liner including at least one trapped vortex, said method comprising the steps of:
- assembling a spray bar assembly to include a heat shield having an upstream side, a downstream side, and a pair of sidewalls extending therebetween, wherein the upstream and downstream sides are aerodynamically-shaped;
- and
- securing the spray bar assembly to the combustor such that the spray bar assembly is configured to supply fuel to the at least one trapped vortex.
A fuel spray bar assembly for a gas turbine engine combustor, said fuel spray bar comprising:
- a spray bar comprising a plurality of injectors configured to supply fuel to the combustor;
- and
- a heat shield comprising an upstream side, a downstream side, and a pair of sidewalls extending therebetween, said upstream side and said downstream side aerodynamically-shaped.
A fuel spray bar assembly in accordance with claim 12 wherein said ring step configured to prevent fuel leakage into said spray bar cavity.
A combustor for a gas turbine comprising a fuel spray bar assembly configured to supply fuel to said combustor, said fuel spray bar assembly comprising a spray bar and a heat shield, said spray bar comprising a plurality of injectors, said heat shield comprising an upstream side, a downstream side, and a pair of sidewalls extending therebetween, said upstream side and said downstream side aerodynamically-shaped.
Dependencies are inferred from the claim text.