초록 ▼

A fuel injector system provides an air assist fuel nozzle which includes a fuel shroud and an air portion. Air passes around the fuel shroud to air jets in the air portion to provide a focused application of air directly onto a fuel spray from each of a multiple of main fuel jets to impart additiona

A fuel injector system provides an air assist fuel nozzle which includes a fuel shroud and an air portion. Air passes around the fuel shroud to air jets in the air portion to provide a focused application of air directly onto a fuel spray from each of a multiple of main fuel jets to impart additional velocity to the fuel as it is flowing out of the fuel nozzle. The air jets increase the resulting fuel spray velocity to a level high enough to reach a prefilmer wall of a swirler even during snap deceleration conditions.

대표청구항 ▼

What is claimed is: 1. A fuel injector comprising: a fuel nozzle which comprises a multiple of fuel jets and multiple of air jets, each of said air jets at least partially focused toward one of said fuel jets to direct an airflow from said fuel nozzle in a rotational direction, said fuel nozzle hav

What is claimed is: 1. A fuel injector comprising: a fuel nozzle which comprises a multiple of fuel jets and multiple of air jets, each of said air jets at least partially focused toward one of said fuel jets to direct an airflow from said fuel nozzle in a rotational direction, said fuel nozzle having a fuel shroud and an air shroud, said air shroud at least partially surrounds said fuel shroud. 2. The fuel injector as recited in claim 1, wherein said fuel nozzle defines a central axis, said fuel jet comprises a multiple of main fuel jets disposed off said axis. 3. The fuel injector as recited in claim 2, wherein said fuel nozzle defines a central axis, said fuel jet comprises a primary fuel jet disposed upon said central axis. 4. The fuel injector as recited in claim 1, further comprising an axial vane located about an outer surface of said fuel shroud. 5. The fuel injector as recited in claim 4, wherein said axial vane spaces said air shroud from said fuel shroud. 6. The fuel injector as recited in claim 1, wherein said air jet and said fuel jet are located within a recessed space within said fuel nozzle. 7. The fuel injector as recited in claim 1, further comprising a swirler defined about said fuel nozzle, said swirler operable to impart a rotation to an airflow adjacent said fuel nozzle in a first rotational direction. 8. A burner section of a gas turbine engine, comprising: a combustion chamber; a swirler located within said combustion chamber along an axis, said swirler imparts a rotation to an airflow adjacent a fuel nozzle in a first rotational direction; and a fuel injector mounted within said swirler along the axis, said fuel injector operable to supply fuel to said combustion chamber, said fuel injector comprising said fuel nozzle with a fuel jet and an air jet, said air jet at least partially focused toward said fuel jet to direct an airflow from said fuel nozzle in said first rotational direction. 9. The burner section as recited in claim 8, wherein said swirler defines an inner recirculation zone and an outer recirculation zone within said combustion chamber. 10. The burner section as recited in claim 8, wherein said swirler comprises a prefilmer wall, said air jet operable to direct an airflow from said fuel nozzle sufficient to impart momentum to the fuel from said air jet. 11. A fuel nozzle, comprising: a pilot fuel jet disposed on a longitudinal central axis; a multiple of main fuel jets disposed off said central axis for dispensing fuel; and a multiple of air jets, disposed off said central axis, each of said air jets adjacent one of said multiple of said fuel jets for dispensing in a rotational direction about said central axis, wherein said air impinges upon said fuel to increase a velocity of said fuel. 12. A fuel injector comprising: a fuel nozzle including a fuel shroud and an air shroud, said air shroud at least partially surrounding said fuel shroud, said fuel shroud having a fuel jet and said air shroud having an air jet, said air jet at least partially focused towards said fuel jet, said air jet forming multiple elongated apertures through said air shroud. 13. A fuel injector comprising: a fuel nozzle having a fuel jet and an air jet, said air jet at least partially focused toward said fuel jet; and a swirler defined about said fuel nozzle, said swirler operable to impart a rotation to an airflow adjacent said fuel nozzle and a first rotational direction wherein said air jet directs an airflow from said fuel nozzle in said first rotational direction. 14. The fuel injector as recited in claim 1, wherein said multiple of fuel jets and said multiple of air jets are arranged in a one to one correspondents. 15. The fuel injector as recited in claim 1, wherein said multiple of fuel jets are main fuel jets disposed off a central axis. 16. The fuel injector as recited in claim 15, further comprising a pilot fuel jet disposed on said longitudinal central axis.