Gas turbine engine exhaust diffuser with movable struts

Abstract

An exhaust diffuser for a gas turbine engine gas turbine engine includes a multiple of circumferentially spaced struts that extend between an inner gaspath wall and an outer gaspath wall, at least one of the multiple of circumferentially spaced struts movable about a strut axis.

What is claimed is: 
     
         1 . An exhaust diffuser for a gas turbine engine comprising:
 an inner gaspath wall;   an outer gaspath wall; and   a multiple of circumferentially spaced struts that extend between said inner gaspath wall and said outer gaspath wall, at least one of said multiple of circumferentially spaced struts movable about a strut axis.   
     
     
         2 . The exhaust diffuser as recited in  claim 1 , wherein each one of said multiple of circumferentially spaced strut is movable about a respective strut axis. 
     
     
         3 . The exhaust diffuser as recited in  claim 1 , wherein said inner gaspath wall is defined around an engine centerline axis. 
     
     
         4 . The exhaust diffuser as recited in  claim 1 , wherein said outer gaspath wall is defined around an engine centerline axis. 
     
     
         5 . The exhaust diffuser as recited in  claim 1 , wherein said at least one of said multiple of circumferentially spaced struts includes a shroud movable about a pivot tube mounted to said inner gaspath wall and said outer gaspath wall. 
     
     
         6 . The exhaust diffuser as recited in  claim 5 , wherein said pivot tube is hollow. 
     
     
         7 . The exhaust diffuser as recited in  claim 1 , wherein said at least one of said multiple of circumferentially spaced struts is movable over an approximate +/−twenty degree range. 
     
     
         8 . A gas turbine engine comprising:
 an exhaust diffuser that defines a gaspath, a multiple of circumferentially spaced struts that extend across said gaspath, at least one of said multiple of circumferentially spaced struts movable about a strut axis.   
     
     
         9 . The gas turbine engine as recited in  claim 8 , wherein each one of said multiple of circumferentially spaced strut is movable about a respective strut axis. 
     
     
         10 . The gas turbine engine as recited in  claim 8 , wherein said gas path is annular. 
     
     
         11 . The gas turbine engine as recited in  claim 8 , wherein said exhaust diffuser is downstream of a turbine section. 
     
     
         12 . A method of operating a gas turbine engine comprising:
 modulating an exhaust diffuser downstream of a turbine section.   
     
     
         13 . The method as recited in  claim 12 , wherein said modulating includes moving at least one of a multiple of circumferentially spaced struts that extend across a gaspath defined by said exhaust diffuser. 
     
     
         14 . The method as recited in  claim 12 , wherein said modulating includes pivoting at least one of a multiple of circumferentially spaced struts that extend across a gaspath defined by said exhaust diffuser. 
     
     
         15 . The method as recited in  claim 12 , wherein said modulating includes moving a multiple of circumferentially spaced struts that extend across a gaspath defined by said exhaust diffuser. 
     
     
         16 . The method as recited in  claim 12 , wherein said modulating includes pivoting a multiple of circumferentially spaced struts that extend across a gaspath defined by said exhaust diffuser.