Airblast nozzle with upstream fuel distribution and near-exit swirl

摘要

A nozzle is provided including a nozzle body 220 having an upstream end (208 Fig 2), 222 and a downstream end 226 aligned about a central axis A. A discharge portion 228 is positioned adjacent the downstream end. A bore 240 extends inwardly from the downstream end over the length of the discharge portion. An opening 238 is formed in the nozzle body adjacent the discharge portion. The opening is fluidly connected to the bore to provide an interior air flow passage. A main fuel channel extends from the upstream end to the discharge portion. At least one fuel flow branch 250 extends through the discharge portion between the bore and an outer surface 252 of the nozzle body. The fuel flow branch is fluidly coupled to a main fuel conduit 214 to provide a fuel flow passage. An outer air cap 270 is positioned about the outer surface of the discharge portion of the nozzle body to form an exterior air flow passage, and the interior air flow passage and the exterior airflow passage intersect near the downstream end of the nozzle body. The nozzle may include both an interior 242 and an outer 260 air swirler.