Turbine engine combustion assembly

Abstract

The invention relates to a turbine engine combustion assembly ( 20 ), which includes: an annular flame tube ( 21 ) including a front wall ( 23 ), a rear wall ( 24 ) and a bottom ( 22 ) arranged facing an engine shaft ( 30 ); an injection wheel ( 41 ) rotated by said engine shaft ( 30 ), partially projecting into the bottom ( 22 ) of the flame tube ( 21 ) and configured such as to spray fuel into the flame tube by centrifugation; and at least one injector ( 35 ), capable of depositing a film of fuel on said injection wheel ( 41 ), said combustion assembly being characterised in that said injector ( 35 ) is arranged so as to pass through said upstream area of the front wall ( 23 ) or the rear wall ( 24 ) of the flame tube ( 21 ), so that the injection opening thereof ( 37 ) opens into said tube ( 21 ), opposite the portion ( 43 ) of said injection wheel ( 41 ) which is located inside said flame tube ( 21 ).

1 . A turbine engine combustion assembly comprising:
 an annular flame tube, comprising a front wall equipped with an upstream zone oriented upstream of the combustion assembly, a rear wall provided with an upstream zone oriented upstream of the combustion assembly and a bottom positioned opposite an engine shaft,   an injection wheel driven in rotation by said engine shaft coaxial with the longitudinal axis X-X′ of the combustion assembly, said injection wheel protruding partially into the flame tube through its bottom and being configured to centrifugally atomize fuel in the flame tube,   at least one injector capable of depositing a film of fuel on said injection wheel,   this combustion assembly being characterized in that said injector is positioned through said upstream zone of the front wall or through said upstream zone of the rear wall of the flame tube and in such a manner that its injection opening leads inside this tube opposite the portion of said injection wheel which is located in said flame tube.   
     
     
         2 . The combustion assembly according to  claim 1 , wherein said injector is positioned through the upstream zone of the front wall of the flame tube, in that said injection wheel is curved at its perimeter upstream of the combustion assembly, so as to have an annular edge, in that the annular edge is bored with several radial injection holes and in that said injector leads into the flame tube opposite the front face of the annular peripheral portion of said injection wheel which is located in the flame tube. 
     
     
         3 . The combustion assembly according to  claim 1 , wherein said injector is positioned through the upstream zone of the rear wall of the flame tube, in that said injection wheel is curved at its perimeter downstream of the combustion assembly, so as to have an annular edge, in that the annular edge is bored with several radial injection holes and in that said injector leads into the flame tube opposite the rear face of the annular peripheral portion of said injection wheel which is located in the flame tube. 
     
     
         4 . The combustion assembly according to  claim 1 , wherein said injection wheel is solid and has an annular fuel receiving radial face which protrudes into the flame tube and in that the injector leads into the flame tube opposite this annular fuel receiving face. 
     
     
         5 . The combustion assembly according to  claim 4 , wherein the injector is oriented so as to project fuel tangentially onto said fuel receiving face of the injection wheel. 
     
     
         6 . The combustion assembly according to  claim 4 , the fuel receiving face of the injection wheel forms an angle α with the axis of the injection opening of the injector, this angle (α) being comprised between 90° and 180°. 
     
     
         7 . The combustion assembly according to  claim 4 , wherein the axis of the injection opening of the injector extends in a plane (P 1 ) which includes the axis of the injection wheel and which is perpendicular to the median plane (P) of the wheel perpendicular to the axis of the injection wheel. 
     
     
         8 . The combustion assembly according to  claim 4 , wherein the axis of the injection opening of the injector is not perpendicular to the median plane (P) of the wheel perpendicular to the axis of the injection wheel. 
     
     
         9 . A turbine engine comprising a combustion assembly according to  claim 1 .