Centerbody injector mini mixer fuel nozzle assembly

A fuel nozzle for a gas turbine engine, the fuel nozzle comprising:

• an end wall defining a fluid chamber;
• a plurality of fuel injectors in axially and radially adjacent arrangement, wherein each fuel injector comprises:
• a centerbody comprising an axially extended outer wall and inner wall, wherein the outer wall and inner wall extend from the end wall toward a downstream end of the fuel injector, and wherein the outer wall, the inner wall, and the end wall together define a fluid conduit extended in a first direction toward the downstream end of the fuel injector and in a second direction toward an upstream end of the fuel injector, the fluid conduit in fluid communication with the fluid chamber, and wherein the centerbody defines at least one radially oriented fluid injection port in fluid communication with the fluid conduit;
• an outer sleeve surrounding the centerbody from the end wall toward the downstream end of the fuel injector, wherein the outer sleeve and the centerbody define a premix passage radially therebetween and an outlet at the downstream end of the premix passage, and wherein the outer sleeve defines a plurality of radially oriented first air inlet ports in circumferential arrangement at a first axial portion of the outer sleeve, and wherein the outer sleeve defines a plurality of radially oriented second air inlet ports in circumferential arrangement at a second axial portion of the outer sleeve;
• and
• an aft wall, wherein the downstream end of the outer sleeve of each fuel injector is connected to the aft wall.

A combustor assembly for a gas turbine engine, the combustor assembly comprising:

• an inner liner;
• an outer liner;
• a bulkhead extended radially between an upstream end of the inner liner and the outer liner, wherein the inner liner is radially spaced from the outer liner with respect to an engine centerline and defining an annular combustion chamber therebetween, and wherein the inner liner and the outer liner extend downstream from the bulkhead;
• and
• at least one fuel nozzle extended at least partially through the bulkhead, wherein the fuel nozzle includes an end wall defining a fluid chamber, a plurality of fuel injectors in axially and radially adjacent arrangement, and an aft wall wherein the downstream end of the outer sleeve of each fuel injector is connected to the aft wall, and wherein each fuel injector includes a centerbody and an outer sleeve surrounding the centerbody from the end wall toward the downstream end of the fuel injector, wherein the centerbody comprises an axially extended outer wall and inner wall, wherein the outer wall and inner wall extend from the end wall toward a downstream end of the fuel injector, and wherein the outer wall, the inner wall, and the end wall together define a fluid conduit extended in a first direction toward the downstream end of the fuel injector and in a second direction toward an upstream end of the fuel injector, the fluid conduit in fluid communication with the fluid chamber, and wherein the centerbody defines at least one radially oriented fluid injection port in fluid communication with the fluid conduit, and wherein the outer sleeve and the centerbody define a premix passage radially therebetween and an outlet at the downstream end of the premix passage, and wherein the outer sleeve defines a plurality of radially oriented first air inlet ports in circumferential arrangement at a first axial portion of the outer sleeve, and wherein the outer sleeve defines a plurality of radially oriented second air inlet ports in circumferential arrangement at a second axial portion of the outer sleeve.