Swirler

Abstract

A swirler including a plate normal to a central axis of the swirler, a plurality of vane cross-sections arranged on the plate and radially positioned about the central axis and a plurality of twisted vanes is provided. The twisted part of each vane is twisted around the central axis wherein the cross section of the twisting vane is normal to the central axis. In one aspect, each vane has an essentially triangular cross section.

1 .- 8 . (canceled) 
   
   
       9 . A swirler, comprising:
 a first plate normal to a central axis of the swirler;   a second plate; and   a plurality of vanes arranged between the first plate and the second plate and radially positioned around the central axis,   wherein each vane has a straight base portion which is arranged at the first plate, and a twisted part arranged between the straight base portion and the second plate, and   wherein the twisted part of each vane is built by twisting the vane around the central axis, and   wherein a cross-section of the respective vane is normal to the central axis, over a first height of the respective vane is the same at every height of the respective vane.   
   
   
       10 . The swirler as claimed in  claim 9 ,
 wherein each vane has an essentially triangular cross-section.   
   
   
       11 . The swirler as claimed in  claim 9 , wherein each vane comprises three longitudinal sides extending between the first plate and the second plate. 
   
   
       12 . The swirler as claimed in  claim 9 , wherein an angle of rotation of the twisted part of each vane is less than or equal to 120°. 
   
   
       13 . The swirler as claimed in  claim 9 , wherein a second height of each straight base portion is equal to or less than 50% of the first height of the vane. 
   
   
       14 . The swirler as claimed in  claim 9 , wherein each swirler passage of a plurality of swirler passages are formed by opposing side faces of adjacent vanes, by the first plate, and by the second plate. 
   
   
       15 . A burner, comprising:
 a swirler, comprising:
 a first plate normal to a central axis of the swirler, 
 a second plate, and 
 a plurality of vanes arranged between the first plate and the second plate and radially positioned around the central axis, 
   wherein each vane has a straight base portion which is arranged at the first plate, and a twisted part arranged between the straight base portion and the second plate, and   wherein the twisted part of each vane is built by twisting the vane around the central axis, and   wherein a cross-section of the respective vane is normal to the central axis, over a first height of the respective vane is the same at every height of the respective vane.   
   
   
       16 . The burner as claimed in  claim 15 ,
 wherein each vane has an essentially triangular cross-section.   
   
   
       17 . The burner as claimed in  claim 15 , wherein each vane comprises three longitudinal sides extending between the first plate and the second plate. 
   
   
       18 . The burner as claimed in  claim 15 , wherein an angle of rotation of the twisted part of each vane is less than or equal to 120°. 
   
   
       19 . The burner as claimed in  claim 15 , wherein a second height of each straight base portion is equal to or less than 50% of the first height of the vane. 
   
   
       20 . The burner as claimed in  claim 15 , wherein each swirler passage of a plurality of swirler passages are formed by opposing side faces of adjacent vanes, by the first plate, and by the second plate. 
   
   
       21 . A turbine engine, comprising:
 a burner, comprising:
 a swirler, comprising:
 a first plate normal to a central axis of the swirler, 
 a second plate, and 
 a plurality of vanes arranged between the first plate and the second plate and radially positioned around the central axis, 
 
   wherein each vane has a straight base portion which is arranged at the first plate, and a twisted part arranged between the straight base portion and the second plate, and   wherein the twisted part of each vane is built by twisting the vane around the central axis, and   wherein a cross-section of the respective vane is normal to the central axis, over a first height of the respective vane is the same at every height of the respective vane.   
   
   
       22 . The turbine engine as claimed in  claim 21 ,
 wherein each vane has an essentially triangular cross-section.   
   
   
       23 . The turbine engine as claimed in  claim 21 , wherein each vane comprises three longitudinal sides extending between the first plate and the second plate. 
   
   
       24 . The turbine engine as claimed in  claim 21 , wherein an angle of rotation of the twisted part of each vane is less than or equal to 120°. 
   
   
       25 . The turbine engine as claimed in  claim 21 , wherein a second height of each straight base portion is equal to or less than 50% of the first height of the vane. 
   
   
       26 . The turbine engine as claimed in  claim 21 , wherein each swirler passage of a plurality of swirler passages is formed by opposing side faces of adjacent vanes, by the first plate, and by the second plate.