Combustor head end section with air supply system for bundled tube fuel nozzle contained therein

A combustor head end section with an air supply system, the combustor head end section comprising:

• 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, and a side wall extending circumferentially around the first plurality of premixing tubes and extending axially from the forward plate to the aft plate;
• wherein the forward plate, the aft plate, and the side wall define a 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 fuel plenum;
• wherein the air supply system comprises the head end air plenum, a first inlet flow conditioner partially defining the head end air plenum, and a second inlet flow conditioner;
• wherein the head end air plenum is in fluid communication with the combustion chamber, via the first plurality of premixing tubes, the first inlet flow conditioner surrounds the bundled tube fuel nozzle assembly, and the second inlet flow conditioner surrounds the first inlet flow conditioner;
• and
• wherein the bundled tube fuel nozzle assembly further comprises an exterior side wall extending from the forward plate to the aft plate and surrounding the side wall;
• and wherein the air supply system further comprises an annular air plenum defined between the exterior side wall and the side wall and a circumferential array of openings defined through the forward plate around a perimeter of the bundled tube fuel nozzle assembly, the circumferential array of openings being configured for fluid communication from the head end air plenum into the annular air plenum.