Abstract: An airfoil module may have an outer diameter ring assembly, a vane assembly having a stator vane and an inner diameter ring assembly. The outer diameter ring assembly and the inner diameter ring assembly may be arranged concentrically with the stator vane of the vane assembly extending between them. The inner diameter ring assembly may have a first inner diameter ring section sealing end and a second inner diameter ring section sealing end. A feather seal may be disposed along the first inner diameter ring section sealing end. A stator ring assembly may comprise multiple airfoil modules arranged in an annulus. The outer diameter ring assemblies may be joined together by brazing or welding, or may share a unified outer diameter ring assembly. The inner diameter ring assemblies may abut feather seals so that the airfoil modules may expand and contract independently along the inner diameter ring assemblies.

Abstract: An airfoil module may have an outer diameter ring assembly, a vane assembly having a stator vane and an inner diameter ring assembly. The outer diameter ring assembly and the inner diameter ring assembly may be arranged concentrically with the stator vane of the vane assembly extending between them. The inner diameter ring assembly may have a first inner diameter ring section sealing end and a second inner diameter ring section sealing end. A feather seal may be disposed along the first inner diameter ring section sealing end. A stator ring assembly may comprise multiple airfoil modules arranged in an annulus. The outer diameter ring assemblies may be joined together by brazing or welding, or may share a unified outer diameter ring assembly. The inner diameter ring assemblies may abut feather seals so that the airfoil modules may expand and contract independently along the inner diameter ring assemblies.

Abstract: An exhaust nozzle assembly includes an inner liner exposed to hot combustion gases and an outer liner spaced a radial distance from the inner liner to form an annular chamber. The inner liner includes a hot side that is directly exposed to the hot combustion gas flow and a cold side is exposed to cooling air within the chamber. The outer liner includes an outer surface exposed to cooling air flow up to a restriction preventing communication of cooling air flow. A plenum is attached to the outer liner to define a plenum chamber that extends into an end portion. The plenum chamber receives cooling air flow from a supply opening and communicates that air to an end portion through a plurality of impingement openings that provide impingement flow of cooling air outboard of the restriction.

Abstract: An example exhaust duct assembly includes a front liner, an intermediate liner and a rear liner. Each of the front, intermediate and rear liners include an inner liner exposed to combustion gases and an outer liner spaced radially apart from the inner liner. An air passage defined between the inner liner and the outer liner provides cooling air utilized for insulating an inner surface of the exhaust duct assembly. A closeout member is provided between the inner and outer liner and defines a portion of an air passage between the closeout member and the inner liner. Air flowing through the air passage is injected into a joint to provide cooling. The closeout member includes a horizontal leg that is bendable in a radial direction to accommodate relative movement between the inner liner and the outer liner.

Abstract: A seal for an exhaust duct includes a metal mesh member sandwiched between an outer plate and an inner plate. The seal includes a plurality of flexible members defined by a plurality of slots in both the inner and outer plates. The flexible members provide for expansion and contraction along with creating flexibility in the region of contact between the seal land and the seal. The metal mesh member substantially eliminates gaps and leak paths created through the slots. The metal mesh member is composed of a plurality of interwoven wire strands impregnated with a high temperature elastomeric sealant. The impregnation of high temperature elastomeric sealant over the metal mesh member improves sealing while maintaining the desired flexibility of the seal.

Abstract: A bushing for assembling an exhaust duct liner with an exhaust duct in a gas turbine engine comprises a body, a bushing opening and a first tab. The body is insertable into a duct opening in an exhaust duct. The bushing opening receives a shaft of a liner fastener, wherein the fastener is connectable with a duct liner. The first tab extends into the duct opening and prevents rotation of the liner fastener.

Abstract: The present invention is directed toward a suspension system for mounting an exhaust duct liner within an exhaust duct of a gas turbine engine. An exhaust liner suspension system comprises a hanger, a bracket and a coil pin. The hanger comprises a first end for connecting with an exhaust duct and a second end having a hinge pin socket. The bracket comprises a base for connecting with an exhaust duct liner and a pedestal having a hinge pin bore. The coil pin is insertable in the hinge pin socket and the hinge pin bore thereby pivotably connecting the hanger and the bracket. The coil pin also provides a dampened connection between the hanger and the bracket.

Abstract: A seal for an exhaust duct includes a metal mesh member sandwiched between an outer plate and an inner plate. The seal includes a plurality of flexible members defined by a plurality of slots in both the inner and outer plates. The flexible members provide for expansion and contraction along with creating flexibility in the region of contact between the seal land and the seal. The metal mesh member substantially eliminates gaps and leak paths created through the slots. The metal mesh member is composed of a plurality of interwoven wire strands impregnated with a high temperature elastomeric sealant. The impregnation of high temperature elastomeric sealant over the metal mesh member improves sealing while maintaining the desired flexibility of the seal.

Abstract: An example exhaust duct assembly includes a front liner, an intermediate liner and a rear liner. Each of the front, intermediate and rear liners include an inner liner exposed to combustion gases and an outer liner spaced radially apart from the inner liner. An air passage defined between the inner liner and the outer liner provides cooling air utilized for insulating an inner surface of the exhaust duct assembly. A closeout member is provided between the inner and outer liner and defines a portion of an air passage between the closeout member and the inner liner. Air flowing through the air passage is injected into a joint to provide cooling. The closeout member includes a horizontal leg that is bendable in a radial direction to accommodate relative movement between the inner liner and the outer liner.

Abstract: An exhaust nozzle assembly includes an inner liner exposed to hot combustion gases and an outer liner spaced a radial distance from the inner liner to form an annular chamber. The inner liner includes a hot side that is directly exposed to the hot combustion gas flow and a cold side is exposed to cooling air within the chamber. The outer liner includes an outer surface exposed to cooling air flow up to a restriction preventing communication of cooling air flow. A plenum is attached to the outer liner to define a plenum chamber that extends into an end portion. The plenum chamber receives cooling air flow from a supply opening and communicates that air to an end portion through a plurality of impingement openings that provide impingement flow of cooling air outboard of the restriction.

Abstract: A cooled exhaust duct for use in gas turbine engines is provided. The cooled exhaust duct includes an axial centerline, a circumference, an annulus, and a plurality of radially expandable bands. The annulus is disposed between a first wall and a second wall, and extends along the axial centerline. The first wall is disposed radially inside of the second wall. Each of the plurality of radially expandable bands extends circumferentially within the annulus. The bands are axially spaced apart from one another. Each band includes a first portion attached to the first wall, a second portion attached to the second wall and an intermediate portion connected to the first and second portions. The bands create circumferentially extending compartments that inhibit axial travel of the cooling air within the annulus.