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US 3,938,323 AGranted
Gas turbine combustor with controlled fuel mixing
AssigneePhillips Petroleum Company
InventorsHarold T. Quigg, Robert M. Schirmer
Life of this patent
Estimating the term…
Abstract
New combustors, and methods of operating same, which produce lower emissions, particularly lower emissions of nitrogen oxides. Method and means are provided for reducing the flame temperature in a primary combustion zone of said combustors.
Claims18
A combustor, comprising, in combination:
- an outer casing;
- a flame tube disposed within said casing and spaced apart therefrom to form an annular chamber between said flame tube and said casing;
- a plurality of fins extending from the external surface of said flame tube into said annular chamber;
- inlet means for introducing a swirling stream of air flowing in a downstream direction into the upstream end portion of said flame tube as the sole stream of air introduced into said upstream end portion of said flame tube;
- and
- fuel inlet means for forming a sole annular stratum of fuel around said stream of air flowing into said flame tube by introducing said fuel in a direction toward and which is from tangential to less than perpendicular, but non-parallel, to the periphery of said stream of air to effect controlled mixing of said fuel and air at the interface therebetween and produce a sole annular fuel-air mixture for introduction into said upstream end portion of said flame tube.
3 more elements
A combustor comprising, in combination:
- a flame tube, open at its downstream end;
- a closure member closing the upstream end of said flame tube;
- an outer casing disposed around said flame tube and said closure member and spaced apart therefrom to form an annular chamber around said flame tube and said closure member, said annular chamber being closed at its downstream end;
- a plurality of fins extending from the external surface of said flame tube into said annular chamber;
- a generally cylindrical swirl chamber formed in said closure member, the downstream end of said swirl chamber being in open communication with the upstream end of said flame tube;
- a first air inlet means for introducing a swirling mass of air into the upstream end portion of said swirl chamber and then into the upstream end of said flame tube as the sole stream of air introduced into said upstream end of said flame tube;
- and
- fuel inlet means for forming a sole annular stratum of fuel around said stream of air flowing in a downstream direction from said swirl chamber into said flame tube by introducing said fuel in a direction toward and which is from tangential to less than perpendicular, but non-parallel, to the periphery of said stream of air to effect controlled mixing of said fuel and air at the interface therebetween and produce a sole annular fuel-air mixture for introduction into said upstream end portion of said flame tube.
5 more elements
Dependencies are inferred from the claim text.