Chamber-bottom baffle, combustion chamber comprising same and gas turbine engine fitted therewith

Abstract

The present invention relates to a baffle ( 10 ) for the bottom of a combustion chamber of a gas turbine engine, comprising a flat portion of wall ( 10 a ) with an opening for an injector of the combustion chamber to pass through, two longitudinal edges ( 10 c, 10 d ) for the assembly to two adjacent baffles and two transverse edges ( 10 e, 10 f ), wherein at least one of the edges comprises a joint cover ( 10 d 1 ) arranging a housing ( 10 d 10 ) along said edge for an edge ( 10′ c ) of an adjacent baffle ( 10 ′) so as to seal the junction between the two edges. The invention also relates to a combustion chamber incorporating said baffles.

1 . A baffle for the bottom of a combustion chamber of a gas turbine engine, comprising a portion of wall with an opening for an injector of the combustion chamber to pass through, two longitudinal edges and two transverse edges, wherein at least one of the longitudinal edges comprises a joint cover arranging a housing along said edge for a fitted tongue or the edge of an adjacent baffle so as to seal the junction between the two edges while allowing them to slide relative to one another when the wall of the chamber bottom expands. 
   
   
       2 . The baffle as claimed in  claim 1 , wherein the housing is formed by a crank of the wall. 
   
   
       3 . The baffle as claimed in  claim 1 , wherein the housing is formed by a groove. 
   
   
       4 . The baffle as claimed in one of the preceding claims, wherein the transverse edges comprise a curved portion of wall, the housings being arranged equally along the longitudinal edges of said curved portion. 
   
   
       5 . The deflector comprising a joint cover as claimed in one of the preceding claims along a longitudinal edge and an edge without a joint cover along the other longitudinal edge, the two edges being matched in order to adapt to an edge of another same baffle placed edge-to-edge. 
   
   
       6 . The baffle comprising a joint cover along the two longitudinal edges as claimed in one of  claims 1  to  4 . 
   
   
       7 . The baffle comprising two longitudinal edges matching the joint covers of the baffle of  claim 6 . 
   
   
       8 . A combustion chamber of a gas turbine engine, being annular comprising an outer wall, an inner wall, a wall connecting the two walls and forming a chamber bottom, baffles as claimed in at least one of the preceding claims and comprising a portion of wall parallel to the chamber bottom, being fitted in the bottom. 
   
   
       9 . The combustion chamber as claimed in the preceding claim, with baffles as claimed in  claim 5 , all being identical. 
   
   
       10 . The combustion chamber as claimed in  claim 8  with baffles as claimed in  claim 3 , all the baffles being identical, a metal tongue being housed in the grooves of the joint covers. 
   
   
       11 . The combustion chamber as claimed in  claim 8  with baffles as claimed in  claims 6  and  7  taken together, wherein the baffles as claimed in  claim 6  alternate with the baffles of  claim 7 . 
   
   
       12 . The combustion chamber as claimed in one of  claims 8  to  11 , wherein the chamber bottom comprises a channel arranging an air gap between the chamber bottom and the joint covers. 
   
   
       13 . A chamber of the convergent type as claimed in one of  claims 8  to  12 . 
   
   
       14 . A gas turbine engine comprising a combustion chamber as claimed in any one of  claims 8  to  14 .