Air assist fuel nozzle
AssigneeDelavan Inc.
InventorDavid H. Bretz
Life of this patent
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Abstract
A fuel injector for a gas turbine is disclosed which includes a nozzle body having a discharge portion defining a discharge orifice, the discharge portion including a fuel circuit for directing a hollow fuel film toward the discharge orifice from a fuel pump associated with the gas turbine, and an air assist circuit for directing pressurized air from a source external to the gas turbine toward the fuel film upstream from the discharge orifice to impinge on an inner surface of the fuel film issuing from the discharge orifice.
Claims25
A fuel injector for a gas turbine comprising:
- a nozzle body having a discharge portion defining a discharge orifice, the discharge portion including a fuel circuit for directing a hollow fuel film toward the discharge orifice from a fuel pump associated with the gas turbine, an air blast circuit for directing engine compressor discharge air toward the fuel film, and an air assist circuit formed within the discharge portion of the nozzle body for directing pressurized air from a source external to the gas turbine toward the fuel film upstream from the discharge orifice to merge with engine compressor discharge air from the air blast circuit and impinge on an inner surface of the fuel film issuing from the discharge orifice.
A fuel injector for a gas turbine comprising:
- a) an inlet portion including a fuel inlet for receiving fuel from a fuel pump associated with the gas turbine, and an air assist inlet for receiving pressurized air from a source external to the gas turbine;
- and
- b) a discharge portion defining a discharge orifice, the discharge orifice including a fuel circuit for directing a hollow fuel film toward the discharge orifice from the fuel inlet, an air blast circuit for directing engine compressor discharge air toward the fuel film, and an air assist circuit formed within the discharge portion for directing pressurized air from the air assist inlet toward the fuel film upstream from the discharge orifice to merge with engine compressor discharge air from the air blast circuit and impinge on an inner surface of the fuel film issuing from the discharge orifice.
A method of fuel atomization in a fuel injector for a gas turbine comprising the steps of:
- a) providing a nozzle having a discharge portion defining a discharge orifice;
- b) directing a hollow fuel film toward the discharge orifice from a fuel pump associated with the gas turbine;
- c) directing engine compressor discharge air through an airblast circuit formed in the discharge portion of the nozzle toward the fuel film;
- and
- d) directing pressurized air through an air assist circuit formed in the discharge portion of the nozzle toward the fuel film upstream from the discharge orifice from a source external to the gas turbine to merge with the engine compressor discharge air and impinge on an inside surface of the fuel film issuing from the discharge orifice.
A fuel injector for a gas turbine comprising:
- a nozzle body having a discharge portion defining a discharge orifice, the discharge portion including a fuel circuit for directing a hollow fuel film toward the discharge orifice from a fuel pump associated with the gas turbine, and an air assist circuit for directing pressurized air from a storage tank external to the gas turbine toward the fuel film upstream from the discharge orifice to impinge on an inner surface of the fuel film issuing from the discharge orifice, wherein the external storage tank is charged by the gas turbine during high pressure operating cycles.
A fuel injector for a gas turbine comprising:
- a) an inlet portion including a fuel inlet for receiving fuel from a fuel pump associated with the gas turbine, and an air assist inlet for receiving pressurized air from an external storage tank charged by the gas turbine during high pressure operating cycles;
- and
- b) a discharge portion defining a discharge orifice, the discharge orifice including a fuel circuit for directing a hollow fuel film toward the discharge orifice from the fuel inlet, and an air assist circuit for directing pressurized air from the air assist inlet toward the fuel film upstream from the discharge orifice to impinge on an inner surface of the fuel film issuing from the discharge orifice.
Dependencies are inferred from the claim text.