Tiled combustor liner for gas turbine engines
A liner for a combustion section of a gas turbine engine includes a sheet defining a sheet opening, a tile liner coupled to the sheet and comprising a plurality of tiles, each tile of the plurality of tiles comprising a protrusion, a fastener for securing each tile of the plurality of tiles to the sheet, the fastener including a bolt including a first half and a second half, the bolt extending between a first end and a second end opposite the first end, the second end of the bolt defining a receptacle between the first half and the second half with the protrusion positioned therein, wherein at least a portion of the first half and the second half of the bolt extend though the sheet opening, and a nut securing the first half of the bolt to the second half of the bolt.
1 . A liner for a combustion section of a gas turbine engine comprising:
a sheet defining a sheet opening;
a tile liner coupled to the sheet and comprising a plurality of tiles, each tile of the plurality of tiles comprising a protrusion; and
a fastener for securing each tile of the plurality of tiles to the sheet, the fastener comprising:
a bolt including a first half and a second half, the bolt defining a first end and a second end opposite the first end, the second end of the bolt defining a receptacle between the first half and the second half with the protrusion positioned therein, wherein at least a portion of the first half and the second half of the bolt extend though the sheet opening; and
a nut engaged with the first end of the bolt securing the first half of the bolt to the second half of the bolt.
2 . The liner of claim 1 , further comprising a biasing member adjacent the protrusion of each tile of the plurality of tiles.
3 . The liner of claim 2 , wherein the biasing member is a spring.
4 . The liner of claim 3 , wherein the biasing member comprises a plurality of springs including the spring.
5 . The liner of claim 4 , wherein the plurality of springs are disc springs arranged in series.
6 . The liner of claim 4 , wherein the plurality of springs are disc springs arranged in parallel.
7 . The liner of claim 2 , wherein the biasing member is disposed radially inward of the protrusion.
8 . The liner of claim 2 , wherein the biasing member is configured to urge the protrusion against the fastener during thermal expansion of the tile and the fastener.
9 . The liner of claim 1 , further comprising a retaining ring disposed about the second end of the bolt.
10 . The liner of claim 9 , wherein the retaining ring secures the first half of the bolt and the second half of the bolt relative to each other.
11 . The liner of claim 9 , wherein the first half of the bolt defines a first retaining ring slot and the second half of the bolt defines a second retaining ring slot, and the retaining ring is disposed in the first retaining ring slot and disposed in the second retaining ring slot.
12 . The liner of claim 1 , wherein the first end of the bolt is disposed on a first side of the sheet and the second end of the bolt is disposed on an opposing second side of the sheet.
13 . The liner of claim 1 , wherein at least one tile of the plurality of tiles is formed of a ceramic matrix composite (CMC).
14 . The liner of claim 13 , wherein the protrusion is formed of CMC and the first half of the bolt and the second half of the bolt are configured to move away from each other upon thermal expansion of the protrusion.
15 . The liner of claim 1 , wherein the sheet is metal.
16 . The liner of claim 1 , wherein the first half of the bolt defines a first bolt outer surface and the second half of the bolt defines a second bolt outer surface, and the nut extends around the first bolt outer surface and the second bolt outer surface.
17 . The liner of claim 1 , wherein the tile defines a base, and the protrusion comprises a head and a shaft, the shaft extending from the base to the head, wherein the head defines a head width and the shaft defines a shaft width, wherein the head width is greater than the shaft width.
18 . The liner of claim 17 , wherein the receptacle defines a head cavity and a shaft cavity, the head cavity defining a head cavity width based on the head width of the head of the protrusion, and the shaft cavity defining a shaft cavity width based on the shaft width of the shaft of the protrusion.
19 . The liner of claim 1 , wherein the first end of the bolt defines a first end width, the second end of the bolt defines a second end width, and the first end width is a different width than the second end width.
20 . The liner of claim 1 , wherein the first end of the bolt defines a first end width, the second end of the bolt defines a second end width, and the first end width is a same width as the second end width.