Panel fuel injector
The present disclosure is directed to a panel fuel injector having a first side wall that defines a plurality of first side injection outlets and a second side wall that defines a plurality of second side injection outlets. A premix air plenum, a fuel plenum, a plurality of first side premixing channels and a plurality of second side premixing channels are defined between the first side wall and the second side wall. Each first side premixing channel is in fluid communication with the premix air plenum, the fuel plenum and a respective first side injection outlet of the plurality of first side injection outlets. Each second side premixing channel is in fluid communication with the premix air plenum, the fuel plenum and a respective second side injection outlet of the plurality of second side injection outlets.
1. A panel fuel injector, comprising:
a first side wall defining a plurality of first side injection outlets;
a second side wall defining a plurality of second side injection outlets; and
a premix air plenum, a fuel plenum, a plurality of first side premixing channels and a plurality of second side premixing channels defined between the first side wall and the second side wall;
wherein each first side premixing channel is in fluid communication with the premix air plenum, the fuel plenum and a respective first side injection outlet of the plurality of first side injection outlets;
wherein each second side premixing channel is in fluid communication with the premix air plenum, the fuel plenum and a respective second side injection outlet of the plurality of second side injection outlets; and
wherein a portion of at least one first side premixing channel extends along an inner surface of the second side wall.
2. The panel fuel injector as in claim 1 , further comprising a cooling air cavity defined between the first side wall and the second side wall.
3. The panel fuel injector as in claim 2 , further comprising an impingement air insert disposed within the cooling air cavity.
4. The panel fuel injector as in claim 2 , wherein at least one first side premixing channel includes a curved portion proximate a respective first side injection outlet, the curved portion having an outer radius, an inner radius, and a port defined in the inner radius, wherein the port provides for fluid communication from the cooling air cavity into the at least one first side premixing channel along the inner radius.
5. The panel fuel injector as in claim 1 , further comprising a cooling air plenum defined between the first side wall and the second side wall proximate to a downstream end portion of the panel fuel injector.
6. The panel fuel injector as in claim 5 , further comprising an impingement air insert disposed within the cooling air plenum.
7. The panel fuel injector as in claim 1 , wherein at least a portion of one or more first side premixing channels is at least partially defined by an inner surface of the second side wall.
8. The panel fuel injector as in claim 1 , wherein a portion of at least one second side premixing channel extends along an inner surface of the first side wall.
9. The panel fuel injector as in claim 8 , wherein at least a portion of one or more second side premixing channels is at least partially defined by an inner surface of the first side wall.
10. A combustion system, comprising:
a first fuel nozzle;
a second fuel nozzle circumferentially spaced from the first fuel nozzle; and
a panel fuel injector disposed between the first fuel nozzle and the second fuel nozzle, the panel fuel injector comprising:
a first side wall defining a plurality of first side injection outlets;
a second side wall defining a plurality of second side injection outlets;
a premix air plenum, a fuel plenum, a plurality of first side premixing channels, and a plurality of second side premixing channels defined between the first side wall and the second side wall;
a cooling air cavity defined between the first side wall and the second side wall;
wherein each first side premixing channel is in fluid communication with the premix air plenum, the fuel plenum, and a respective first side injection outlet of the plurality of first side injection outlets;
wherein each second side premixing channel is in fluid communication with the premix air plenum, the fuel plenum, and a respective second side injection outlet of the plurality of second side injection outlets; and
wherein at least one first side premixing channel includes a curved portion proximate a respective first side injection outlet, the curved portion having an outer radius, an inner radius, and a port defined in the inner radius, wherein the port provides for fluid communication from the cooling air cavity into the at least one first side premixing channel along the inner radius.
11. The combustion system as in claim 10 , further comprising an impingement air insert disposed within the cooling air cavity.
12. The combustion system as in claim 10 , further comprising a cooling air plenum defined between the first side wall and the second side wall proximate to a downstream end portion of the panel fuel injector.
13. The combustion system as in claim 12 , further comprising an impingement air insert disposed within the cooling air plenum.
14. The combustion system as in claim 10 , wherein a portion of at least one first side premixing channel of the plurality of first side premixing channels extends along an inner surface of the second side wall.
15. The combustion system as in claim 14 , wherein at least a portion of one or more first side premixing channels of the plurality of first side premixing channels is at least partially defined by an inner surface of the second side wall.
16. The combustion system as in claim 10 , wherein a portion of at least one second side premixing channel of the plurality of second side premixing channels extends along an inner surface of the first side wall.
17. The combustion system as in claim 16 , wherein at least a portion of one or more second side premixing channels of the plurality of second side premixing channels is at least partially defined by an inner surface of the first side wall.
18. A panel fuel injector, comprising:
a first side wall defining a plurality of first side injection outlets;
a second side wall defining a plurality of second side injection outlets;
a premix air plenum defined between the first side wall and the second side wall;
a fuel plenum defined between the first side wall and the second side wall;
a plurality of first side premixing channels defined between the first side wall and the second side wall, each first side premixing channel in fluid communication with the premix air plenum, the fuel plenum, and a respective first side injection outlet of the plurality of first side injection outlets;
a plurality of second side premixing channels defined between the first side wall and the second side wall, each second side premixing channel in fluid communication with the premix air plenum, the fuel plenum, and a respective second side injection outlet of the plurality of second side injection outlets;
a cooling air cavity defined between the first side wall and the second side wall, a first side of the cooling air cavity at least partially defined by an inner side surface of the first side wall, and a second side of the cooling air cavity at least partially defined by an inner side surface of the second side wall; and
an impingement air insert disposed within the cooling air cavity, the impingement air insert comprising a first wall complementary in shape to the portion of the inner side surface of the first side wall that at least partially defines the first side of the cooling air cavity, a second wall complementary in shape to the portion of the inner side surface of the second side wall that at least partially defines the second side of the cooling air cavity, and a plurality of impingement holes formed in the first wall and the second wall of the impingement air insert, the plurality of impingement holes oriented and formed to direct multiple discrete jets of air onto the portion of the inner side surface of the first side wall that at least partially defines the first side of the cooling air cavity and the portion of the inner side surface of the second side wall that at least partially defines the second side of the cooling air cavity.
19. The panel fuel injector as in claim 18 , wherein the impingement air insert is upstream of the cool side surface of the first side wall and the cool side surface of the second side wall, and wherein the impingement air insert is downstream of a high air pressure region within the cooling air cavity.
20. The panel fuel injector as in claim 18 , wherein the impingement air insert forms a gap between the cool side surface of the first side wall and a high air pressure region within the cooling air cavity and forms a gap between the cool side surface of the second side wall and the high air pressure region within the cooling air cavity.