Cmc cross-over tube

Abstract

A fluid conduit may be provided comprising a ceramic matrix composite (CMC) cross-over tube and a flange. The CMC cross-over tube may comprise a first end configured to extend into a first combustor liner of a gas turbine engine, and a second end configured to extend into a second combustor liner of a gas turbine engine. The interior of the CMC cross-over tube may define a passageway. The flange may extend outwardly from an outer surface of the CMC cross-over tube. The flange may be configured to engage at least one of the first combustor liner and the second combustor liner.

What is claimed is: 
     
         1 . A fluid conduit comprising:
 a ceramic matrix composite (CMC) cross-over tube comprising a first end configured to extend into a first combustor liner of a gas turbine engine and a second end configured to extend into a second combustor liner of the gas turbine engine, wherein an interior of the CMC cross-over tube defines a passageway; and   a flange extending outwardly from an outer surface of the CMC cross-over tube, wherein the flange is configured to engage at least one of the first combustor liner and the second combustor liner.   
     
     
         2 . The fluid conduit of  claim 1 , wherein the CMC cross-over tube and the flange are formed from a single CMC element. 
     
     
         3 . The fluid conduit of  claim 1 , wherein the flange is arranged between the first end and the second end of the CMC cross-over tube. 
     
     
         4 . The fluid conduit of  claim 1 , wherein the flange is a first flange arranged at the first end of the CMC cross-over tube and the fluid conduit further comprises a second flange arranged at the second end of the CMC cross-over tube. 
     
     
         5 . The fluid conduit of  claim 1 , wherein the flange further comprises a plurality of channels configured to facilitate fluid flow to the CMC cross-over tube from an outer edge of the flange. 
     
     
         6 . The fluid conduit of  claim 5 , wherein the channels pass through an interior of the flange. 
     
     
         7 . The fluid conduit of  claim 5 , wherein the channels are arranged on at least one of a first surface of the flange and a second surface of the flange. 
     
     
         8 . The fluid conduit of  claim 7 , wherein a first portion of the plurality of channels arranged on the first surface is circumferentially offset from a second portion of the plurality of channels arranged on the second surface. 
     
     
         9 . The fluid conduit of  claim 1 , wherein the cross-over tube further comprises a plurality of channels arranged on the outer surface of the CMC cross-over tube. 
     
     
         10 . A combustor system, comprising:
 a combustion chamber comprising a combustor liner;   a ceramic matrix composite (CMC) cross-over tube having a first end and a second end, the first end extending into the combustion chamber through the combustor liner, wherein an interior of the CMC cross-over tube defines a passageway extending from the first end to the second end; and   a flange extending radially from the CMC cross-over tube between the first end and the second end, wherein the flange is configured to engage the liner.   
     
     
         11 . The combustor system of  claim 10 , wherein an outer surface of the CMC cross-over tube contacts an inner surface of the combustor liner. 
     
     
         12 . The combustor system of  claim 11 , wherein the outer surface of the CMC cross-over tube is separated from the inner surface of the combustor liner by a gap when the combustor system is under thermal loading. 
     
     
         13 . The combustor system of  claim 10 , wherein an engagement surface of the flange contacts an opposing surface of the combustor liner. 
     
     
         14 . The combustor system of  claim 13 , wherein the engagement surface of the flange is separated from the opposing surface of the combustor liner by a gap when the combustor system is under thermal loading. 
     
     
         15 . The combustor system of  claim 10 , wherein the CMC cross-over tube and the flange are a single CMC element. 
     
     
         16 . The combustor system of  claim 10 , wherein the flange is positioned within the combustion chamber. 
     
     
         17 . The combustor system of  claim 16 , wherein the combustor liner further comprises a collar extending outwardly from the combustion chamber and overlapping a portion of an outer surface of the CMC cross-over tube. 
     
     
         18 . A method of manufacturing a fluid conduit, comprising:
 providing a porous ceramic preform in a shape of a tube; and   forming the ceramic preform into a ceramic matrix composite (CMC) cross-over tube, the CMC cross-over tube comprising a first end configured to extend into a first combustion chamber and a second end configured to extend into a second combustion chamber, wherein an inner surface of the CMC cross-over tube defines a passageway configured to allow fluid communication between the first combustion chamber and the second combustion chamber.   
     
     
         19 . The method of  claim 18  further comprising forming a flange coupled to the CMC cross-over tube, wherein the flange extends outwardly from an outer surface of the CMC cross-over tube, the flange configured to engage at least one of the first combustion chamber or the second combustion chamber to restrain movement of the CMC cross-over tube with respect to at least one of the first combustion chamber and the second combustion chamber. 
     
     
         20 . The method of  claim 18 , wherein forming the ceramic preform into the CMC cross-over tube comprises forming the ceramic preform into the CMC cross-over tube and a CMC flange that extends outwardly from an outer surface of the CMC cross-over tube, the flange configured to engage at least one of the first combustion chamber or the second combustion chamber, and wherein the CMC cross-over tube and the CMC flange are a single CMC element formed from the ceramic preform.