Method for decreasing a heat load on a combustor liner

摘要

A combustor liner (60) has a stepped combustor liner surface (62) and an overhang portion (66) forming an air cooling slot (64). A contoured rear facing edge (70) of the overhang portion reduces turbulence of combustion gas flow and reduces a combustor liner surface area exposed to combustion gases. A thermal barrier coating (78) is also applied to the contoured rear facing edge, reducing heat flow into the overhang portion and hence reducing the operating temperature of the combustor liner. Thus, the amount of cooling air is reduced, which can reduce exhaust emissions, increase engine performance and extend a working life of the combustor assembly.