Burner

Abstract

A burner 1 for a heat generator comprises an outlet 10 connectable to a combustion chamber 9 , wherein at least part of an inner surface of the outlet 10 is provided with corrugations 11 which are adapted to facilitate the production of axial vorticity in the region of the outlet 10.

1 . A burner for a heat generator comprising: 
 an outlet having an inner surface, the outlet connectable to a combustion chamber;    wherein at least part of the inner surface of the outlet comprises corrugations adapted to facilitate the production of axial vorticity in the region of the outlet.    
   
   
       2 . A burner as claimed in  claim 1 , wherein the corrugations are provided over substantially all of the inner surface of the outlet.  
   
   
       3 . A burner as claimed in  claim 2 , wherein the outlet comprises a nozzle.  
   
   
       4 . A burner as claimed in  claim 1 , wherein the corrugations comprise lobes.  
   
   
       5 . A burner as claimed in  claim 1 , wherein the corrugations are rectangular in cross-section.  
   
   
       6 . A burner as claimed in  claim 1 , wherein the ratio of the length to the depth of the corrugations is from 1:1 to 10:1.  
   
   
       7 . A burner as claimed in  claim 6 , wherein the ratio of the length to the depth of the corrugations is from 1:1 to 3:1.  
   
   
       8 . A burner as claimed in  claim 1 , further comprising: 
 a mixing section; and    wherein the corrugations extend over at least 20% of the mixing section of the burner.    
   
   
       9 . A burner as claimed in  claim 1 , wherein the corrugations are triangular in cross-section.