Float wall combustor panels having airflow distribution features
Combustor panels including panel bodies with first and second sides, a pin array extending from the first side, wherein each pin extends a first height, has a pin diameter, and is separated from adjacent pins by a pin array separation distance. A structural protrusion extends from the first side. No pins of the pin array are located within a flashing distance that is equal to a protrusion separation distance plus half of the pin diameter, wherein a location of the pin is measured from a center point of the pin to a closest point on the exterior surface of the structural protrusion. At least one pin array extension is integrally formed with the structural protrusion, the pin array extension extending along the first side to a position that replaces a pin of the pin array that would be within the flashing distance.
1. A combustor panel comprising:
a panel body in a gas turbine engine, the panel body having a first side and a second side;
a plurality of cooling pins extending from the first side, the plurality of cooling pins arranged in a pin array, wherein each cooling pin extends a first height from the first side of the panel body, has a pin diameter, and is separated from adjacent cooling pins of the pin array by a pin array separation distance;
at least one structural protrusion extending from the first side of the panel body, wherein the at least one structural protrusion is at least one of a dilution hole boss and an attachment mechanism;
wherein no pins of the pin array are located within a flashing distance that is equal to a protrusion separation distance plus one half of the pin diameter, wherein the protrusion separation distance is a predetermined minimum distance between an exterior surface of the at least one structural protrusion and an exterior surface of a cooling pin, the predetermined minimum distance may be equal to the pin array separation distance, and wherein a location of the cooling pin is measured from a center point of the cooling pin to a closest point on the exterior surface of the at least one structural protrusion; and
at least one pin array extension integrally formed with the at least one structural protrusion, the at least one pin array extension extending along the first side of the panel body from the exterior surface of the at least one structural protrusion to a position of a cooling pin of the pin array that would be within the flashing distance, the at least one pin array extension replacing the cooling pin of the pin array that would be within the flashing distance.
2. The combustor panel of claim 1 , wherein the at least one structural protrusion extends from the first side a distance greater than the first height.
3. The combustor panel of claim 1 , wherein the at least one structural protrusion includes a plurality of pin array extensions arranged around the at least one structural protrusion.
4. The combustor panel of claim 1 , wherein the pin array separation distance is between 0.010 inches and 0.015 inches.
5. The combustor panel of claim 4 , wherein the pin array separation distance is 0.013 inches.
6. A combustor comprising:
a combustor shell in a gas turbine engine; and
at least one combustor panel mounted to the combustor shell, the at least one combustor panel comprising:
a panel body having a first side and a second side;
a plurality of cooling pins extending from the first side, the plurality of cooling pins arranged in a pin array, wherein each cooling pin extends a first height from the first side of the panel body, has a pin diameter, and is separated from adjacent cooling pins of the pin array by a pin array separation distance;
at least one structural protrusion extending from the first side of the panel body, wherein the at least one structural protrusion is at least one of a dilution hole boss arranged to allow dilution air to pass through the combustor shell and the combustor panel into a combustion chamber, and an attachment mechanism, wherein the attachment mechanism fixedly attaches the at least one combustor panel to the combustor shell;
wherein no cooling pins of the pin array are located within a flashing distance that is equal to a protrusion separation distance plus one half of the pin diameter, wherein the protrusion separation distance is a predetermined minimum distance between an exterior surface of the at least one structural protrusion and an exterior surface of a cooling pin, the predetermined minimum distance may be equal to the pin array separation distance, and wherein a location of the cooling pin is measured from a center point of the cooling pin to a closest point on the exterior surface of the at least one structural protrusion; and
at least one pin array extension integrally formed with the at least one structural protrusion, the at least one pin array extension extending along the first side of the panel body from the exterior surface of the at least one structural protrusion to a position of a cooling pin of the pin array that would be within the flashing distance, the at least one pin array extension replacing the cooling pin of the pin array that would be within the flashing distance.
7. The combustor of claim 6 , wherein the at least one structural protrusion extends from the first side a distance greater than the first height.
8. The combustor of claim 6 , wherein the at least one structural protrusion includes a plurality of pin array extensions arranged around the at least one structural protrusion.
9. The combustor of claim 6 , wherein the pin array separation distance is between 0.010 inches and 0.015 inches.
10. The combustor of claim 9 , wherein the pin array separation distance is 0.013 inches.
11. The combustor of claim 6 , wherein the at least one combustor panel is positioned with the second side exposed to the combustion chamber and a cooling flow passes between the combustor shell and the at least one combustor panel along the first side, wherein the pin array provides thermal transfer between the at least one combustor panel and the cooling flow.
12. The combustor of claim 11 , wherein the at least one pin array extension alters the cooling flow around the at least one structural protrusion to prevent hot zones on the at least one combustor panel at locations downstream of the at least one structural protrusion in a direction of flow of the cooling flow.
13. The combustor of claim 6 , wherein the at least one combustor panel is a float wall combustor panel.