LEAKAGE REDUCING VENTURI FOR DRY LOW NITRIC OXIDES (NOx) COMBUSTORS

Abstract

Disclosed is a leakage reducing venturi for a dry low nitric oxides (NOx) emissions combustor, the venturi including a substantially annular outer liner, a substantially annular inner liner, a venturi channel defined by the annular inner liner and the annular outer liner, the venturi channel including a forward end and an aft end, a forward weld disposed in proximity to the forward end of the venturi channel, the forward weld being configured to connect the annular outer liner with the annular inner liner, and an aft weld disposed in proximity to the aft end of the venturi channel, the aft weld being configured to connect the annular outer liner with the annular inner liner.

1 . A leakage reducing venturi for a dry low nitric oxides (NOx) emissions combustor, the venturi comprising:
 a substantially annular outer liner;   a substantially annular inner liner;   a venturi channel defined by said annular inner liner and said annular outer liner, said venturi channel including a forward end and an aft end;   a forward weld disposed in proximity to said forward end of said venturi channel, said forward weld being configured to connect said annular outer liner with said annular inner liner; and   an aft weld disposed in proximity to said aft end of said venturi channel, said aft weld being configured to connect said annular outer liner with said annular inner liner.   
   
   
       2 . The venturi of  claim 1 , wherein a forward extent of said venturi channel terminates at said forward weld, and wherein an aft extent of said venturi channel terminates at said aft weld. 
   
   
       3 . The venturi of  claim 2 , wherein said forward weld and said aft weld are disposed at substantially opposite ends of said venturi channel. 
   
   
       4 . The venturi of  claim 1 , wherein said outer annular liner includes a plurality of inlets configured to inlet a cooling fluid into said venturi channel. 
   
   
       5 . The venturi of  claim 1 , wherein said annular inner liner and said annular outer liner are integrated into a parent liner of the dry low nitric oxides (NOx) emissions combustor. 
   
   
       6 . The venturi of  claim 5 , wherein said forward weld includes a welding of said outer annular liner and said inner annular liner to opposing ends of a y-joint that is connected to said parent liner. 
   
   
       7 . The venturi of  claim 5 , wherein said aft weld includes a welding of said outer annular liner and said inner annular liner to opposing ends of a y-joint that is connected to said parent liner.