Bundled tube fuel nozzle assembly for gas turbine combustor

A bundled tube fuel nozzle assembly for a gas turbine combustor, the bundled tube fuel nozzle assembly comprising:

• a forward plate facing a head end air plenum, an aft plate facing a combustion chamber, a first plurality of premixing tubes extending from the forward plate to the aft plate, an interior side wall extending circumferentially around the first plurality of premixing tubes and extending axially from the forward plate to the aft plate, and an exterior side wall extending circumferentially around the interior side wall and extending axially from the forward plate to the aft plate;
• wherein the forward plate, the aft plate, the interior side wall, and the exterior side wall define an exterior fuel plenum;
• wherein the forward plate, the aft plate, and the interior side wall define an interior fuel plenum in fluid communication with the exterior fuel plenum, and each premixing tube of the first plurality of premixing tubes includes at least one fuel injection hole therethrough in fluid communication with the interior fuel plenum;
• wherein the head end air plenum is in fluid communication with the combustion chamber, via inlet ends of the first plurality of premixing tubes;
• wherein at least one fuel conduit is coupled to the forward plate in fluid communication with the exterior fuel plenum;
• and
• wherein the at least one fuel conduit includes a coupling conduit with a forward end having a circular cross-section and an aft end having a slot-shaped cross-section, the aft end being coupled to the exterior fuel plenum at a respective slot-shaped fuel inlet defined in the forward plate.

A bundled tube fuel nozzle assembly for a gas turbine combustor, the bundled tube fuel nozzle assembly comprising:

• a forward plate facing a head end air plenum, an aft plate facing a combustion chamber, a first plurality of premixing tubes extending from the forward plate to the aft plate, an interior side wall extending circumferentially around the first plurality of premixing tubes and extending axially from the forward plate to the aft plate, and an exterior side wall extending circumferentially around the interior side wall and extending axially from the forward plate to the aft plate;
• wherein the forward plate, the aft plate, the interior side wall, and the exterior side wall define an exterior fuel plenum;
• wherein the forward plate, the aft plate, and the interior side wall define an interior fuel plenum in fluid communication with the exterior fuel plenum via fuel delivery chutes that extend from the interior side wall into the interior fuel plenum and are disposed around a perimeter of the bundled tube fuel nozzle assembly and that are oriented tangentially relative to a radius of the bundled tube fuel nozzle assembly, and each premixing tube of the first plurality of premixing tubes includes at least one fuel injection hole therethrough in fluid communication with the interior fuel plenum;
• wherein the head end air plenum is in fluid communication with the combustion chamber, via inlet ends of the first plurality of premixing tubes.