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US 8,683,804 B2Granted
Premixing apparatus for fuel injection in a turbine engine
AssigneeGeneral Electric Company
InventorsGregory Allen Boardman, David Martin Johnson, Ronald James Chila, Nishant Govindbhai Parsania, Hasan Karim, Joseph Citeno
Life of this patent
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Abstract
In one embodiment, a system includes a fuel nozzle that includes a fuel injector that includes a fuel port and a premixer tube. The premixer tube includes a wall disposed about a central passage, multiple air ports extending through the wall into the central passage, and a catalytic region. The catalytic region includes a catalyst, disposed inside the wall along the central passage, configured to increase a reaction of fuel and air.
Claims19
A system, comprising:
- a fuel nozzle, comprising:
- a fuel injector having a conical body portion comprising a fuel port;
- and
- a premixer tube, comprising:
- a wall disposed about a central passage;
- a plurality of air ports extending through the wall into the central passage;
- and
- a catalytic region comprising a catalyst disposed inside the wall along the central passage, wherein the catalyst is configured to increase a reaction of fuel and air, wherein the catalytic region comprises a catalytic structure extending radially inward and away from an inner surface of the wall into the central passage, the catalytic structure comprising a plurality of flat catalytic fins extending from the inner surface, and wherein the conical-shaped fuel injector is disposed inside the premixer tube upstream from the catalytic region.
5 more elements
A system, comprising:
- a fuel nozzle, comprising:
- a fuel injector comprising a fuel port;
- and
- a premixer tube, comprising:
- a wall disposed about a central passage;
- a plurality of air ports extending through the wall into the central passage;
- an outlet region comprising a bell-shaped wall and a flame stabilizer, wherein the bell-shaped wall comprises a non-expanding portion located upstream of an expanding portion, and the non-expanding portion is concentrically disposed about a downstream end of the wall and the flame stabilizer;
- and
- a catalytic region comprising a catalyst disposed inside the wall along the central passage, wherein the catalyst is configured to increase a reaction of fuel and air, wherein the catalytic region comprises a catalytic structure extending radially inward and away from an inner surface of the wall into the central passage, the catalytic structure comprising a plurality of flat catalytic fins extending from the inner surface, and wherein the fuel injector is disposed inside the premixer tube upstream from the catalytic region.
6 more elements
A system, comprising:
- a fuel nozzle, comprising:
- a fuel injector having a conical body portion comprising a fuel port;
- and
- a premixer tube, comprising:
- a wall disposed about a central passage;
- a plurality of air ports extending through the wall into the central passage, wherein the plurality of air ports comprises a first teardrop shaped air port having first and second portions disposed one after another along a flow direction through the central passage, wherein the second portion is narrower than the first portion, the second portion comprises a constant width along a portion of a length of the second portion, and the second portion is elongated along the flow direction, wherein the conical-shaped fuel injector is disposed inside the premixer tube;
- and
- a catalytic region comprising a catalyst disposed inside the wall along the central passage, wherein the catalyst is configured to increase a reaction of fuel and air, wherein the catalytic region comprises a catalytic structure extending radially inward and away from an inner surface of the wall into the central passage, the catalytic structure comprising a plurality of flat catalytic fins extending from the inner surface, and wherein the conical-shaped fuel injector is disposed inside the premixer tube upstream from the catalytic region.
5 more elements
A system, comprising:
- a fuel nozzle, comprising:
- a fuel injector having a conical body portion comprising a fuel port;
- and
- a premixer tube, comprising:
- a wall disposed about a central passage;
- a plurality of air ports extending through the wall into the central passage;
- a catalytic region comprising a catalyst disposed inside the wall along the central passage, wherein the catalyst is configured to increase a reaction of fuel and air, wherein the conical-shaped fuel injector is disposed inside the premixer tube upstream from the catalytic region;
- and
- an outlet having a flame stabilizer, wherein the flame stabilizer comprises an outer ring, a center body, a plurality of struts extending from the outer ring to the center body, wherein the center body comprises a central passage extending from an upstream side to a downstream side of the center body, the central passage extends through the center body, and the center body comprises an outer surface that expands in diameter in a downstream direction from the upstream side to the downstream side.
6 more elements
Dependencies are inferred from the claim text.