Additively manufactured combustion liner and axial fuel stage injector

A method, comprising:

• additively manufacturing a combustor body including a one-piece member including:
• a combustion liner including a cylindrical portion and a tapered transition portion, at least one axial fuel stage (AFS) injector directed into the combustion liner, at least one fuel passage defined within and enclosed by opposed exterior surfaces of the combustion liner and extending longitudinally from a forward end thereof to the at least one AFS injector, wherein the combustion liner is solid between the opposed exterior surfaces thereof apart from the at least one fuel passage defined therewithin, at least one cooling passage defined within and enclosed by the opposed exterior surfaces of the combustion liner and extending longitudinally within the combustion liner from the forward end thereof to an aft end thereof, and an aft frame at an aft end of the tapered transition portion of the combustion liner, wherein the AM combustor body includes a plurality of parallel, sintered metal layers;
• coupling a head end fuel nozzle assembly to a forward end of the combustor body;
• and
• coupling a turbine inlet to the aft frame.