FUEL/AIR MIXING SYSTEM FOR FUEL NOZZLE

摘要

A fuel nozzle includes an inner wall defining a central passage extending in an axial direction of the fuel nozzle, a hub wall surrounding the inner wall and defining a first annular passage, an outer wall surrounding the hub wall and defining a second annular passage, and a shroud surrounding the outer wall and defining a third annular passage. A swirler may receive air and direct the air into the first annular passage. The swirler includes at least one swirl vane extending from the shroud to the hub wall that has an air passage extending between the shroud and the hub wall. The air passage is coupled to the first annular passage and has a first width adjacent the shroud and a second width adjacent the hub wall. The second width is larger than the first width defining a diverging outlet into the first annular passage.

主权项

1. A system, comprising:
a fuel nozzle, comprising:
an inner wall defining a central passage extending in an axial direction of the fuel nozzle;a hub wall surrounding the inner wall and defining a first annular passage;an outer wall surrounding the hub wall and defining a second annular passage;a shroud surrounding the outer wall and defining a third annular passage; anda swirler configured to receive air and to direct the air into the first annular passage, wherein the swirler comprises at least one swirl vane extending from the shroud to the hub wall, wherein the at least one swirl vane comprises an air passage extending between the shroud and the hub wall, and the air passage is coupled to the first annular passage and has a first width adjacent the shroud and a second width adjacent the hub wall, and the second width is larger than the first width defining a diverging outlet into the first annular passage.