Pilot arrangement, nozzle device, method and gas turbine arrangement

A method for producing a pilot arrangement comprising:

• providing a pilot arrangement for use in a nozzle device of a gas turbine arrangement, comprising:
• a pilot fuel nozzle,
• a central body arranged on a longitudinal axis,
• a cavity extending along the longitudinal axis for conducting fuel, a narrowest flow cross section of the cavity being configured to be larger than a flow cross section of the pilot fuel nozzle,
• the pilot fuel nozzle adjoining the cavity in a downstream direction and comprising a pilot line and a pilot fuel outlet arranged at a downstream end of the pilot line, a narrowest flow cross section of the pilot line being configured to be smaller than that of the cavity,
• the cavity being arranged in the central body,
• at least one swirling element being arranged in a circumferential manner around the central body, wherein the central body and the at least one swirling element form a swirling arrangement,
• the at least one swirling element, the central body and the pilot fuel nozzle being configured as a continuous, monolithic component,
• an atomizer arranged within the fuel nozzle,
• manufacturing the at least one swirling element, the central body and the pilot fuel nozzle as the continuous monolithic component using an additive manufacturing method.

A pilot arrangement for use in a nozzle device of a gas turbine arrangement, comprising:

• a pilot fuel nozzle,
• a central body arranged on a longitudinal axis,
• a cavity extending along the longitudinal axis for conducting fuel, a narrowest flow cross section of the cavity being configured to be larger than a flow cross section of the pilot fuel nozzle,
• the pilot fuel nozzle adjoining the cavity in a downstream direction and comprising a pilot line and a pilot fuel outlet arranged at a downstream end of the pilot line, a narrowest flow cross section of the pilot line being configured to be smaller than that of the cavity,
• the cavity being arranged in the central body,
• at least one swirling element being arranged in a circumferential manner around the central body, wherein the central body and the at least one swirling element form a swirling arrangement,
• the at least one swirling element, the central body and the pilot fuel nozzle being configured as a continuous, monolithic component:
• wherein all walls of the pilot arrangement are aligned at an angle of no more than 45° to the longitudinal axis.