| CPC F23R 3/286 (2013.01) [F23D 14/58 (2013.01); F23D 14/62 (2013.01)] | 14 Claims |
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1. A fuel delivery apparatus for a gas turbine engine, comprising:
a fuel nozzle insert;
a flow guide connected to and projecting axially along an axis out from an end of the fluid nozzle insert;
an air swirler body circumscribing the fuel nozzle insert and the flow guide;
a plurality of fuel passages formed by and radially between the fuel nozzle insert and the air swirler body, the plurality of fuel passages radially converging and spiraling about the fuel nozzle insert towards the flow guide;
an annular mixing cavity formed by and axially between the flow guide and the air swirler body;
an annular guide passage extending radially outward from the plurality of fuel passages to the annular mixing cavity; and
a plurality of air passages projecting axially through the air swirler body to the mixing cavity.
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11. A fuel delivery apparatus for a gas turbine engine, comprising:
a fuel injector including a plurality of fuel passages, a guide passage, a plurality of air passages, a mixing cavity and a fuel injector outlet;
the plurality of fuel passages extending along an axis to the guide passage, and the plurality of fuel passages converging radially inwards towards the axis as the plurality of fuel passages spiral about the axis towards the guide passage;
the guide passage turning radially outwards away from the axis as the guide passage extends from the plurality of fuel passages to the mixing cavity;
the plurality of air passages converging radially inwards towards the axis as the plurality of air passages extend axially to the mixing cavity;
the mixing cavity fluidly coupling the guide passage and the plurality of air passages to the fuel injector outlet;
the fuel injector further including an inner structure and an outer structure circumscribing the inner structure;
each of the plurality of fuel passages disposed radially between and formed by the inner structure and the outer structure;
the inner structure comprising an insert disposed in an inner bore of the outer structure;
each of the plurality of fuel passages comprising a channel projecting into the insert;
the inner structure further comprising a flow guide attached to and projecting axially out from an end of the insert;
the flow guide comprising an outer surface forming an inner peripheral boundary of the guide passage; and
the outer surface having a curved sectional geometry which curves radially outward away from the axis as the outer surface extends axially away from the insert.
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