A combustor comprising: an end cover; at least one fuel nozzle extending from the end cover and at least partially surrounded by a combustion liner, the combustion liner extending from the at least one fuel nozzle toward an aft frame, wherein the combustion liner defines a combustion chamber having a primary combustion zone downstream from the at least one fuel nozzle and a secondary combustion zone downstream from the primary combustion zone; an outer sleeve spaced apart from and surrounding the combustion liner such that an annulus is defined therebetween; and a fuel injection assembly, the fuel injection assembly comprising: a fuel injector extending through the outer sleeve, the annulus, and the combustion liner to the secondary combustion zone; a fuel supply conduit positioned outside of the outer sleeve, the fuel supply conduit extending to the fuel injector; and a shielding assembly coupled to the outer sleeve and at least partially surrounding the fuel supply conduit, wherein the shielding assembly includes a venturi nozzle having a circumferentially converging portion and a circumferentially diverging portion, characterized in that at least one fuel sweep opening is defined in the outer sleeve immediately forward of the venturi nozzle, and wherein the at least one fuel sweep opening is disposed within the shielding assembly. an end cover; at least one fuel nozzle extending from the end cover and at least partially surrounded by a combustion liner, the combustion liner extending from the at least one fuel nozzle toward an aft frame, wherein the combustion liner defines a combustion chamber having a primary combustion zone downstream from the at least one fuel nozzle and a secondary combustion zone downstream from the primary combustion zone; an outer sleeve spaced apart from and surrounding the combustion liner such that an annulus is defined therebetween; and a fuel injection assembly, the fuel injection assembly comprising: a fuel injector extending through the outer sleeve, the annulus, and the combustion liner to the secondary combustion zone; a fuel supply conduit positioned outside of the outer sleeve, the fuel supply conduit extending to the fuel injector; and a shielding assembly coupled to the outer sleeve and at least partially surrounding the fuel supply conduit, wherein the shielding assembly includes a venturi nozzle having a circumferentially converging portion and a circumferentially diverging portion, characterized in that at least one fuel sweep opening is defined in the outer sleeve immediately forward of the venturi nozzle, and wherein the at least one fuel sweep opening is disposed within the shielding assembly. a fuel injector extending through the outer sleeve, the annulus, and the combustion liner to the secondary combustion zone; a fuel supply conduit positioned outside of the outer sleeve, the fuel supply conduit extending to the fuel injector; and a shielding assembly coupled to the outer sleeve and at least partially surrounding the fuel supply conduit, wherein the shielding assembly includes a venturi nozzle having a circumferentially converging portion and a circumferentially diverging portion, characterized in that at least one fuel sweep opening is defined in the outer sleeve immediately forward of the venturi nozzle, and wherein the at least one fuel sweep opening is disposed within the shielding assembly.