Panel burn through tolerant shell design
A dual wall liner for a gas turbine engine may comprise a shell having a first side and a second side, a panel contacting the shell, the panel at least partially defining a hot gas path through which a hot gas flows, wherein the first side of the shell faces the panel, wherein the shell includes a thermal barrier coating (TBC) disposed on the first side of the shell. The TBC may thermally protect the shell from heat from a hot gas path.
1. A gas turbine engine combustor, comprising:
a shell having a first side and a second side opposite the first side, the shell comprises a shell material;
a panel contacting the shell, the panel at least partially defining a hot gas path through which a hot combustion gas flows, wherein the first side of the shell faces the panel and the hot gas path;
a thermal barrier coating (TBC) disposed on the shell material on the first side of the shell, wherein the TBC is comprised of a metallic layer;
a first heat transfer augmentation feature extending from the second side of the shell, wherein the first heat augmentation feature comprises a trip strip; and
a second heat transfer augmentation feature extending from the second side of the shell, wherein the second heat transfer augmentation feature comprises a cooling fin;
wherein a shape of the first heat augmentation feature is different from a shape of the second heat transfer augmentation feature, and a height of the cooling fin is greater than a height of the trip strip.
2. The gas turbine engine combustor of claim 1 , wherein the panel is coupled to the shell.
3. The gas turbine engine combustor of claim 1 , wherein the TBC comprises a lower thermal conductivity than that of the shell material, wherein the thermal conductivity of the TBC and the thermal conductivity of the shell material are both measured under common predetermined reference conditions.
4. The gas turbine engine combustor of claim 2 , further comprising a panel stud coupling the panel to the shell, wherein the TBC surrounds the panel stud.
5. The gas turbine engine combustor of claim 2 , further comprising a plurality of holes extending through the shell and the TBC, wherein the plurality of holes are configured to direct a flow of cooling air from the second side of the shell to the panel.
6. A method for manufacturing a dual wall liner for a gas turbine engine, comprising:
disposing a thermal barrier coating (TBC) on a first side of a shell, wherein the TBC is comprised of a metallic layer; and
coupling a panel to the shell, the panel at least partially defining a hot gas path through which a hot combustion gas flows; wherein the first side of the shell faces the panel and the hot gas path, wherein the shell comprises the first side and a second side opposite the first side, and the shell comprises a shell material, wherein the TBC is disposed on the shell material;
disposing a first heat transfer augmentation feature to extend from the second side of the shell, wherein the first heat augmentation feature comprises a trip strip; and
disposing a second heat transfer augmentation feature to extend from the second side of the shell, wherein the second heat transfer augmentation feature comprises a cooling fin;
wherein a shape of the first heat augmentation feature is different from a shape of the second heat transfer augmentation feature, and a height of the cooling fin is greater than a height of the trip strip.