Burner for a combustor of a turbogroup

Abstract

A burner for a combustor of a turbogroup is provided. The burner includes a burner body, an outlet flange, and a plenum which is exposed, or can be exposed, to admission of cooling medium. In order to improve the cooling of the outlet flange, a flow passage and a supply passage are formed. The flow passage and the supply passage are arranged so that the cooling medium from the plenum enters the flow passage, is transferred from the flow passage into the supply passage, and is discharged from the supply passage through holes into a burner interior.

1 . A burner for a combustor of a turbogroup, comprising a burner body ( 2 ) enclosing a burner interior ( 5 ) and at an outlet end ( 6 ) thereof has an outlet port ( 7 ) by which the burner interior ( 5 ) communicates with a combustion chamber ( 8 ) of the combustor, and which includes a plurality of holes ( 9 ) for a cooling medium; an outlet flange ( 3 ) arranged at the outlet end ( 6 ) and surrounding the outlet opening ( 7 ), and by which the burner body ( 2 ) is fastened, on the combustor, and which has a combustion chamber side ( 10 ) which delimits the combustion chamber ( 8 ); a plenum ( 4 ) enclosing the burner body ( 2 ) and which is exposable to admission of cooling medium; a flow passage ( 13 ), which is open to the plenum ( 4 ), is formed on a plenum side ( 11 ) of the outlet flange ( 3 ) that faces the plenum ( 4 ); a supply passage ( 15 ), which at one end communicates with the flow passage ( 13 ) and which at the other end is closed, and which between its ends communicates with a plurality of holes ( 9 ) of the burner body ( 2 ), is formed on an outer side ( 14 ) of the burner body ( 2 ) that faces the plenum ( 4 ), the flow passage ( 13 ) and the supply passage ( 15 ) are arranged so that cooling medium from the plenum ( 4 ) enters the flow passage ( 13 ), is transferred from the flow passage ( 13 ) into the supply passage ( 15 ), and is discharged from the supply passage ( 15 ) through the plurality of holes ( 9 ) into the burner interior ( 5 ). 
   
   
       2 . The burner as claimed in  claim 1 , wherein the flow passage ( 13 ) at one end communicates with the supply passage ( 15 ) and at the other end is open to the plenum ( 4 ). 
   
   
       3 . The burner as claimed in  claim 1 , wherein the flow passage ( 13 ) at one end communicates with the supply passage ( 15 ), at the other end is closed, and between its ends has inlet openings ( 19 ) which communicate with the plenum ( 4 ). 
   
   
       4 . The burner as claimed in  claim 3 ,wherein the inlet openings ( 19 ) are arranged for creating an impingement cooling of the outlet flange ( 3 ) on its plenum side ( 11 ). 
   
   
       5 . The burner as claimed in  claim 1 , wherein a flow guide plate ( 21 ) is arranged in a transition region ( 20 ) in which the flow passage ( 13 ) merges into the supply passage ( 15 ), and deflects the flow which issues from the flow passage ( 13 ) for entering the supply passage ( 15 ). 
   
   
       6 . The burner as claimed in  claim 1 , wherein the supply passage ( 15 ) only extends in an outlet-side end region ( 22 ) of the burner body ( 2 ). 
   
   
       7 . The burner as claimed in  claim 1 , wherein in the region of the supply passage ( 15 ) the number of holes per area unit in the burner body ( 2 ) is greater than outside it. 
   
   
       8 . The burner as claimed in  claim 1 , wherein the flow passage ( 13 ) encompasses the burner body ( 2 ) in an annular manner along the outlet flange ( 3 ) and guides the cooling medium in a radial direction with regard to a longitudinal center axis of the burner ( 1 ). 
   
   
       9 . The burner as claimed in  claim 1 , wherein the supply passage ( 15 ) encompasses at least an outlet-side end region ( 22 ) of the burner body ( 2 ) in an annular manner and guides the cooling medium in an axial direction with regard to a longitudinal center axis of the burner ( 1 ). 
   
   
       10 . The burner as claimed in  claim 1 , wherein the flow passage ( 13 ) and the supply passage ( 15 ) are formed with a guide plate arrangement ( 23 ) which is arranged in the plenum ( 4 ) on the outer side ( 14 ) of the burner body ( 2 ) and on the plenum side ( 11 ) of the outlet flange ( 3 ).