Fan track liner assembly

Abstract

A fan track liner assembly for a gas turbine engine. The assembly may comprise an annular attrition liner, outer member, containment core, and containment liner. The containment core may be embedded between the attrition liner and the outer member. The containment liner may be bonded to a radially outer surface of the outer member. The fan track liner assembly is disposed between a plurality of rotatable fan blades and an engine casing that encases the fan blades. The containment core and/or containment liner may comprise aerogel.

What is claimed is: 
     
         1 . A fan track liner assembly for a gas turbine engine comprising:
 an annular attrition liner forming a radially inner member of said assembly;   a composite septum bonded to a radially outer surface of said attrition liner; and   a containment core bonded to a radially outer surface of said septum, said containment core comprising aerogel.   
     
     
         2 . The fan track liner assembly of  claim 1  wherein said containment core comprises aerogel encased in a sheath. 
     
     
         3 . The fan track liner assembly of  claim 2  wherein said sheath comprises composite. 
     
     
         4 . The fan track liner assembly of  claim 1  wherein the radially outer surface of said containment core is adapted to be bonded to a fan casing in the gas turbine engine. 
     
     
         5 . The fan track liner assembly of  claim 1  wherein said containment core comprises a plurality of arcuate segments that collectively form an annulus. 
     
     
         6 . The fan track liner assembly of  claim 1  wherein said containment core is axially segmented. 
     
     
         7 . The fan track liner assembly of  claim 1  wherein said containment core comprises aerogel produced from one of a silica, alumina, chromia, carbon, organic, metal oxide, or metal-based gel. 
     
     
         8 . A fan track liner assembly for a gas turbine engine, said assembly comprising:
 an annular attrition liner forming a radially inner member of said assembly;   an annular outer member positioned radially outward from said annular attrition liner;   a containment core embedded between said attrition liner and said outer member; and   an outer containment liner bonded to a radially outer surface of said outer member, said outer containment liner comprising aerogel.   
     
     
         9 . The fan track liner assembly of  claim 8  wherein said containment core comprises aerogel. 
     
     
         10 . The fan track liner assembly of  claim 8  wherein said assembly is adapted to be carried by a fan casing in the gas turbine engine with said outer containment liner being positioned between said outer member and the fan casing. 
     
     
         11 . The fan track liner assembly of  claim 8  wherein said assembly is coupled to a fan casing with fasteners. 
     
     
         12 . The fan track liner assembly of  claim 8  wherein said containment core comprises a metal honeycomb. 
     
     
         13 . The fan track liner assembly of  claim 12  wherein said metal is aluminum. 
     
     
         14 . The fan track liner assembly of  claim 8  wherein said outer containment liner is axially segmented. 
     
     
         15 . The fan track liner assembly of  claim 8  wherein said outer containment liner comprises a plurality of arcuate segments that collectively form an annulus. 
     
     
         16 . The fan track liner assembly of  claim 8  said outer containment liner wherein comprises aerogel produced from one of a silica, alumina, chromia, or carbon gel. 
     
     
         17 . A method of making a fan containment system comprising:
 assembling a fan track liner assembly comprising an attrition liner, a septum, a containment core, and an outer member, said step of assembling comprising:
 bonding said septum to a radially outer surface of said attrition liner; 
 bonding said containment core to a radially outer surface of said attrition liner; and 
 coupling said outer member to said attrition liner such that said containment core is encased between said outer member and said attrition liner; 
   bonding a containment liner comprising aerogel to a radially outer surface of said outer member; and   coupling said fan track liner assembly to an engine casing such that said fan track liner assembly is disposed radially outward from a plurality of rotatable fan blades.   
     
     
         18 . The method of  claim 17  wherein said coupling is accomplished with fasteners. 
     
     
         19 . The method of  claim 17  wherein the containment liner is encased in a composite sheath prior to bonding to said outer member. 
     
     
         20 . The method of  claim 17  wherein said containment core comprises aerogel.