Cartridge tip for turbomachine combustor

A combustor comprising:

• an end cover;
• a combustion liner defining a combustion chamber;
• a plurality of fuel nozzles extending between the end cover and the combustion liner;
• and
• at least one liquid fuel cartridge extending through a fuel nozzle of the plurality of fuel nozzles to a cartridge tip, the cartridge tip comprising:
• a main body comprising an outer annular wall and an inner core each extending between a respective upstream end and a respective downstream end, the inner core radially spaced apart from the outer annular wall such that an annular air passage is defined at least partially between the outer annular wall and the inner core,
• wherein one or more struts couple the outer annular wall to the inner core, an annular heat shield includes a first end coupled to the outer annular wall within the annular air passage downstream of the one or more struts, the annular heat shield extends axially from the first end to a free end within the annular air passage, a circumferential rib extends radially outward from the inner core and terminates within the annular air passage with the circumferential rib radially spaced apart from the annular heat shield within the annular air passage, wherein the circumferential rib is disposed downstream of the first end;
• a pilot fuel circuit defined in the inner core of the main body, the pilot fuel circuit extending between a pilot inlet defined in the upstream end of the inner core and a pilot outlet defined in the downstream end of the inner core, wherein the pilot fuel circuit extends at least partially along an axial centerline of the cartridge tip, and wherein the pilot fuel circuit includes a pilot inlet portion extending from the pilot inlet;
• and
• a main fuel circuit defined in the inner core of the main body, the main fuel circuit extending between a main inlet in the upstream end of the inner core and a plurality of main outlets circumferentially spaced apart from one another and disposed upstream from the pilot outlet, the main fuel circuit including an annular plenum surrounding the pilot inlet portion of the pilot fuel circuit.