Transition duct system with arcuate ceramic liner for delivering hot-temperature gases in a combustion turbine engine

Apparatus for delivering hot-temperature gasses from a plurality of combustors in a combustion turbine engine to a first row of turbine blades in the combustion turbine engine, the apparatus comprising:

• an exit piece for each one of the plurality of combustors, wherein the exit piece comprises an arcuate connection segment defining an arcuate flow path, wherein each arcuate connection segment forms an open perimeter, wherein each exit piece connects to an adjacent exit piece at the arcuate connection segment of the adjacent exit piece, and the connection of the exit piece and the adjacent exit piece defines a portion of an annular chamber, the annular chamber arranged to extend circumferentially and oriented concentric to a longitudinal axis of the combustion turbine engine, for delivering the hot-temperature gasses to the first row of blades,
• the exit piece comprising:
• a metal outer shell and an arcuate ceramic liner inwardly disposed onto the metal outer shell along the arcuate connection segment of the exit piece, wherein the arcuate ceramic liner forms an open liner perimeter in correspondence with the open perimeter of the arcuate connection segment of the exit piece;
• retainer structures disposed in the arcuate connecting segment of the exit piece to retain respective edges of the open liner perimeter in the arcuate connecting segment of the exit piece, wherein each retainer structure comprises a body comprising a first flange and a second flange interconnected by a web, the body circumferentially extending in the arcuate connection segment of the exit piece, wherein the first and second flanges interconnected by the web define a groove configured to receive a corresponding ceramic liner protrusion at a respective edge of the open liner perimeter in the arcuate connection segment of the exit piece, the ceramic liner protrusion constituting a free end of the arcuate ceramic liner;
• fasteners disposed between the respective retainer structures to fasten the arcuate ceramic liner to the metal outer shell over an area between the edges of the open perimeter of the arcuate connection segment of the exit piece;
• wherein the exit piece further comprises a straight path segment defining a straight flow path for receiving the hot-temperature gasses from a respective combustor of the plurality of combustors, wherein the straight path segment forms a closed perimeter starting at an inlet end of the straight path segment, wherein the closed perimeter of the straight path segment of the exit piece changes to an open perimeter that is in fluid communication with the portion of the annular chamber along a common plane between a convergence flow junction (CFJ) and an outlet end of the straight path segment,
• wherein the arcuate flow path and the straight flow path constitute individual flow paths that mutually converge at the convergence flow junction, and the exit piece further comprising:
• a straight ceramic liner inwardly disposed onto the metal outer shell along the straight path segment of the exit piece, wherein the straight ceramic liner forms a closed liner perimeter and an open liner perimeter respectively in correspondence with the closed perimeter and the open perimeter of the straight path segment of the exit piece.