Combustor nozzle, combustor, and gas turbine including same
A combustor nozzle includes a plurality of mixing tubes through which air and fuel flow, a plurality of accommodation tubes each accommodating and supporting the plurality of mixing tubes therein, a first fuel tube coupled to each accommodation tube to supply a first fuel into the accommodation tube, a second fuel tube coupled to each accommodation tube to supply a second fuel into the accommodation tube, a dispersion chamber provided in each accommodation tube so as to be combined with the second fuel tube to receive the second fuel therein, a first fuel supply member supplying the first fuel received in each accommodation tube into each mixing tube, and a second fuel supply member supplying the second fuel received in the dispersion chamber into each mixing tube.
1 . A combustor nozzle comprising:
a plurality of mixing tubes through which air and fuel flow;
a plurality of accommodation tubes each accommodating the plurality of mixing tubes therein;
a first fuel tube coupled to each accommodation tube to supply a first fuel into the accommodation tube;
a second fuel tube coupled to each accommodation tube to supply a second fuel into the accommodation tube;
a dispersion chamber provided in each accommodation tube so as to be combined with the second fuel tube to receive the second fuel therein;
a first fuel supply member supplying the first fuel received in each accommodation tube into each mixing tube; and
a second fuel supply member supplying the second fuel received in the dispersion chamber into each mixing tube;
wherein the second fuel supply member comprises a tubular member having a first portion inclined downstream with respect to a radial direction of the mixing tube, a second portion bent from the first portion toward an inner circumferential wall of the mixing tube, and an outlet downstream of the first portion;
wherein an outlet end of the second fuel supply member is in direct contact with the inner circumferential wall of the mixing tube, and
wherein the outlet of the second fuel supply member is inclined at an angle of 30 degrees to 80 degrees with respect to the inner circumferential wall of the mixing tube.
2 . The combustor nozzle according to claim 1 , wherein the second fuel supply member forms a concentrated fuel flow flowing along the inner circumferential wall of the mixing tube with a higher concentration of fuel than a surrounding area.
3 . The combustor nozzle according to claim 2 , wherein two or more second fuel supply members are circumferentially provided on the mixing tube so as to be spaced apart from each other to form an annular concentrated fuel flow.
4 . The combustor nozzle according to claim 3 , wherein an outlet of the first fuel supply member is disposed closer to a center of the mixing tube than the outlet of the second fuel supply member.
5 . The combustor nozzle according to claim 4 , wherein the outlet of the second fuel supply member is located further downstream of the outlet of the first fuel supply member.
6 . The combustor nozzle according to claim 3 , wherein the first fuel comprises a hydrogen-based fuel having hydrogen as a major component or a hydrocarbon-based fuel having hydrocarbon as a major component, and the second fuel may include a hydrocarbon-based fuel having hydrocarbon as a major component.
7 . A combustor comprising:
a burner having a plurality of nozzles through which fuel and air are injected; and
a duct assembly coupled to one side of the burner to allow the fuel and the air to be combusted therein and combustion gases to be transferred to a turbine, wherein each nozzle of the plurality of nozzles comprises:
a plurality of mixing tubes through which the air and the fuel flow;
a plurality of accommodation tubes each accommodating the plurality of mixing tubes therein;
a first fuel tube coupled to each accommodation tube to supply a first fuel into the accommodation tube;
a second fuel tube coupled to each accommodation tube to supply a second fuel into the accommodation tube;
a dispersion chamber provided in each accommodation tube so as to be combined with the second fuel tube to receive the second fuel therein;
a first fuel supply member supplying the first fuel received in each accommodation tube into each mixing tube; and
a second fuel supply member supplying the second fuel received in the dispersion chamber into each mixing tube;
wherein the second fuel supply member comprises a tubular member having a first portion inclined downstream with respect to a radial direction of the mixing tube, a second portion bent from the first portion toward an inner circumferential wall of the mixing tube, and an outlet downstream of the first portion;
wherein an outlet end of the second fuel supply member is in direct contact with the inner circumferential wall of the mixing tube, and
wherein the outlet of the second fuel supply member is inclined at an angle of 30 degrees to 80 degrees with respect to the inner circumferential wall of the mixing tube.
8 . The combustor according to claim 7 , wherein the second fuel supply member forms a concentrated fuel flow flowing along the inner circumferential wall of the mixing tube with a higher concentration of fuel than a surrounding area, wherein two or more second fuel supply members are circumferentially provided on the mixing tube so as to be spaced apart from each other to form an annular concentrated fuel flow.
9 . The combustor according to claim 8 , wherein an outlet of the first fuel supply member is disposed closer to a center of the mixing tube than the outlet of the second fuel supply member.
10 . The combustor according to claim 9 , wherein the outlet of the second fuel supply member is located further downstream of the outlet of the first fuel supply member.
11 . The combustor according to claim 8 , wherein the first fuel comprises a hydrogen-based fuel having hydrogen as a major component or a hydrocarbon-based fuel having hydrocarbon as a major component, and the second fuel may include a hydrocarbon-based fuel having hydrocarbon as a major component.
12 . A gas turbine comprising:
a compressor compressing an externally introduced air to form a compressed air;
a combustor mixing the compressed air from the compressor with fuel to produce a mixture and combusting the mixture; and
a turbine having a plurality of turbine blades rotated by combustion gases from the combustor, wherein the combustor comprises:
a burner having a plurality of nozzles through which the fuel and the compressed air are injected; and
a duct assembly coupled to one side of the burner to allow the fuel and the compressed air to be combusted therein and combustion gases to be transferred to the turbine,
wherein each nozzle of the plurality of nozzles comprises:
a plurality of mixing tubes through which the compressed air and the fuel flow;
a plurality of accommodation tubes each accommodating the plurality of mixing tubes therein;
a first fuel tube coupled to each accommodation tube to supply a first fuel into the accommodation tube;
a second fuel tube coupled to each accommodation tube to supply a second fuel into the accommodation tube;
a dispersion chamber provided in each accommodation tube so as to be combined with the second fuel tube to receive the second fuel therein;
a first fuel supply member supplying the first fuel received in each accommodation tube into each mixing tube; and
a second fuel supply member supplying the second fuel received in the dispersion chamber into each mixing tube;
wherein the second fuel supply member comprises a tubular member having a first portion inclined downstream with respect to a radial direction of the mixing tube, a second portion bent from the first portion toward an inner circumferential wall of the mixing tube, and an outlet downstream of the first portion;
wherein an outlet end of the second fuel supply member is in direct contact with the inner circumferential wall of the mixing tube, and
wherein the outlet of the second fuel supply member is inclined at an angle of 30 degrees to 80 degrees with respect to the inner circumferential wall of the mixing tube.