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A combustor having liners made from ceramic matrix composite materials (CMC's) that are capable of withstanding higher temperatures than metallic liners. The ceramic matrix composite liners are used in conjunction with mating components that are manufactured from superalloy materials. To permit the

A combustor having liners made from ceramic matrix composite materials (CMC's) that are capable of withstanding higher temperatures than metallic liners. The ceramic matrix composite liners are used in conjunction with mating components that are manufactured from superalloy materials. To permit the use of a combustor having liners made from CMC materials in conjunction with metallic materials used for the mating forward cowls, and aft seals with attached seal retainer over the broad range of temperatures of a combustor, the combustor is designed to allow for the differential thermal expansion of the differing materials at their interfaces in a manner that does not introduce stresses into the liner as a result of thermal expansion and also balances the flow of cooling air as a result of the thermal expansion.

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1. A combustor for use in a gas turbine engine, comprised of:a forward cowl made from a metallic material capable of withstanding elevated temperatures of combustion in an oxidative and corrosive atmosphere having a first coefficient of thermal expansion; an aft seal attached to a seal retainer, the

1. A combustor for use in a gas turbine engine, comprised of:a forward cowl made from a metallic material capable of withstanding elevated temperatures of combustion in an oxidative and corrosive atmosphere having a first coefficient of thermal expansion; an aft seal attached to a seal retainer, the aft seal having a second coefficient of thermal expansion and the seal retainer having a third coefficient of thermal expansion, each made from a metallic material capable of withstanding elevated temperatures of combustion in an oxidative and corrosive atmosphere; and a combustion liner made from a ceramic matrix composite material capable of withstanding elevated temperatures of combustion in an oxidative and corrosive atmosphere having a fourth coefficient of thermal expansion less than the first coefficient of thermal of the forward cowl and less than the second coefficient of thermal expansion of the aft seal and less than the third coefficient of thermal expansion of the seal retainer, the combustor liner positioned between the forward cowl and aft seal with attached seal retainer in a manner to permit differential thermal expansion of the ceramic combustor liner, the forward cowl and the aft seal with attached seal retainer without introducing stresses into the liner sufficient to fracture the liner as a result of differential thermal expansion at elevated temperatures.