US 11,703,226 B2
Gas turbine combustor
Satoshi Kumagai, Tokyo (JP); Yoshihide Wadayama, Tokyo (JP); and Keisuke Miura, Tokyo (JP)
Assigned to Mitsubishi Heavy Industries, Ltd., Tokyo (JP)
Filed by Mitsubishi Heavy Industries, Ltd., Tokyo (JP)
Filed on Jan. 12, 2021, as Appl. No. 17/146,772.
Claims priority of application No. 2020-045140 (JP), filed on Mar. 16, 2020.
Prior Publication US 2021/0285639 A1, Sep. 16, 2021
Int. Cl. F23R 3/28 (2006.01); F02C 7/22 (2006.01); F23R 3/34 (2006.01)
CPC F23R 3/286 (2013.01) [F02C 7/22 (2013.01); F05D 2260/941 (2013.01); F05D 2260/96 (2013.01); F05D 2260/964 (2013.01); F23R 3/28 (2013.01); F23R 3/343 (2013.01); F23R 2900/00005 (2013.01); F23R 2900/00014 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A gas turbine combustor provided with a burner, the burner comprising:
a fuel nozzle group having fuel nozzles for fuel supply;
a fuel nozzle plate which structurally supports the fuel nozzles and serves to distribute a fuel flowing from an upstream side to the fuel nozzles; and
a perforated plate located downstream of the fuel nozzles and having nozzle holes corresponding to the fuel nozzles, wherein
compressed air flows into the burner from an outer circumference of the fuel nozzle plate, the fuel nozzle group including outer circumferential fuel nozzles and inner circumferential fuel nozzles, each of the outer circumferential fuel nozzles having a first outer diameter of at least a proximal end portion of the respective outer circumferential fuel nozzle being larger than a second outer diameter of each of the inner circumferential fuel nozzles,
the inner circumferential fuel nozzles are more densely arranged than the outer circumferential fuel nozzles, and
the fuel nozzle group including a center nozzle group and outer nozzle groups, the center nozzle group having a center that is a center axis of the burner and a radial direction with respect to the center axis, the center nozzle group having inner circumferential fuel nozzles arranged within a circular area and the center nozzle group is circumferentially surrounded by the outer nozzle groups, the outer nozzle groups each having both inner circumferential fuel nozzles and outer circumferential fuel nozzles arranged within a respective similar circular area of each outer nozzle group, all of the inner circumferential fuel nozzles of the center nozzle group and of the outer nozzle groups being located within a radial distance from the center axis, and all of the outer circumferential fuel nozzles being located radially outward of the radial distance.