A fuel injection assembly for use in a turbine engine , said fuel injection assembly comprising: an end cover ; an endcap assembly downstream from said end cover; a fluid supply chamber extending from said end cover to said endcap assembly; a plurality of tube assemblies positioned at said endcap assembly, each of said plurality of tube assemblies comprising: a housing having a fuel plenum and a cooling fluid plenum defined therein, said cooling fluid plenum downstream from said fuel plenum and separated therefrom by an intermediate wall ; a plurality of tubes extending through said housing, each of said plurality of tubes in flow communication with said fluid supply chamber and a combustion chamber downstream from said tube assembly; and an aft plate at a downstream end of said cooling fluid plenum, said aft plate comprising at least one aperture defined therethrough to facilitate mixing fluids from said cooling fluid plenum and said plurality of tubes and at least one of cooling and maintaining a temperature of said aft plate; and at least one fuel delivery pipe coupled to at least one of said plurality of tube assemblies for supplying fuel to said fuel plenum, wherein each of said plurality of tubes comprises an outlet defined in said aft plate , said at least one aperture comprises a cooling fluid passage adjacent said outlet to facilitate at least one of cooling and maintaining a temperature of said outlet, and wherein a plurality of vanes extend through said cooling fluid passage between an outer wall of said tube and a wall of said aft plate , wherein each of said plurality of vanes has at least one of an angled and a helical shape. an end cover ; an endcap assembly downstream from said end cover; a fluid supply chamber extending from said end cover to said endcap assembly; a plurality of tube assemblies positioned at said endcap assembly, each of said plurality of tube assemblies comprising: a housing having a fuel plenum and a cooling fluid plenum defined therein, said cooling fluid plenum downstream from said fuel plenum and separated therefrom by an intermediate wall ; a plurality of tubes extending through said housing, each of said plurality of tubes in flow communication with said fluid supply chamber and a combustion chamber downstream from said tube assembly; and an aft plate at a downstream end of said cooling fluid plenum, said aft plate comprising at least one aperture defined therethrough to facilitate mixing fluids from said cooling fluid plenum and said plurality of tubes and at least one of cooling and maintaining a temperature of said aft plate; and a housing having a fuel plenum and a cooling fluid plenum defined therein, said cooling fluid plenum downstream from said fuel plenum and separated therefrom by an intermediate wall ; a plurality of tubes extending through said housing, each of said plurality of tubes in flow communication with said fluid supply chamber and a combustion chamber downstream from said tube assembly; and an aft plate at a downstream end of said cooling fluid plenum, said aft plate comprising at least one aperture defined therethrough to facilitate mixing fluids from said cooling fluid plenum and said plurality of tubes and at least one of cooling and maintaining a temperature of said aft plate; and at least one fuel delivery pipe coupled to at least one of said plurality of tube assemblies for supplying fuel to said fuel plenum, wherein each of said plurality of tubes comprises an outlet defined in said aft plate , said at least one aperture comprises a cooling fluid passage adjacent said outlet to facilitate at least one of cooling and maintaining a temperature of said outlet, and wherein a plurality of vanes extend through said cooling fluid passage between an outer wall of said tube and a wall of said aft plate , wherein each of said plurality of vanes has at least one of an angled and a helical shape. <EOS>