Abstract: A fuel injection system may include a fuel spray nozzle including a nozzle head and a nozzle stem. The nozzle head may include an air channel and a swirler in fluid communication with the air channel. The nozzle stem may extend into a compressor discharge pressure cavity and convey fuel to the air channel. The air channel may combine air from the swirler with the fuel from the nozzle stem and convey a mixture of fuel and air to a combustor. The fuel injection system may further include a scoop. The scoop may be coupled to the fuel spray nozzle. The scoop may receive air that flows into the compressor discharge pressure cavity from a diffusor. An outer surface of the fuel spray nozzle and an inner surface of the scoop define a duct in fluid communication with the swirler. The swirler may receive air from the duct.

Abstract: An example system may include a computing device and an additive manufacturing tool. The computing device may define a digital representation of an inclined channel at least partially within a component, including an angle ? based on a formula ?=2 tan?1 [tan(?/2)/sin(?)]. The inclined channel may define a longitudinal axis inclined at the angle ? relative to a build direction, and may include a gabled roof configured to collapse into an arched roof. The angle ? is a predetermined interior angle of the gabled roof measured in a plane substantially parallel to the build direction. The angle ? is an interior angle of the gabled roof in a plane substantially normal to the inclined longitudinal axis. The computing device may control, based on the digital representation, the additive manufacturing tool to deposit a material along the build direction to fabricate the component including the inclined channel.

Abstract: A fuel injection system may include a fuel spray nozzle including a nozzle head and a nozzle stem. The nozzle head may include an air channel and a swirler in fluid communication with the air channel. The nozzle stem may extend into a compressor discharge pressure cavity and convey fuel to the air channel. The air channel may combine air from the swirler with the fuel from the nozzle stem and convey a mixture of fuel and air to a combustor. The fuel injection system may further include a scoop. The scoop may be coupled to the fuel spray nozzle. The scoop may receive air that flows into the compressor discharge pressure cavity from a diffusor. An outer surface of the fuel spray nozzle and an inner surface of the scoop define a duct in fluid communication with the swirler. The swirler may receive air from the duct.

Abstract: An example system may include a computing device and an additive manufacturing tool. The computing device may define a digital representation of an inclined channel at least partially within a component, including an angle ? based on a formula ?=2 tan?1 [tan(?/2)/sin(?)]. The inclined channel may define a longitudinal axis inclined at the angle ? relative to a build direction, and may include a gabled roof configured to collapse into an arched roof. The angle ? is a predetermined interior angle of the gabled roof measured in a plane substantially parallel to the build direction. The angle ? is an interior angle of the gabled roof in a plane substantially normal to the inclined longitudinal axis. The computing device may control, based on the digital representation, the additive manufacturing tool to deposit a material along the build direction to fabricate the component including the inclined channel.