Method and burner arrangement for the production of hot gas, and use of said method

Abstract

A method for producing hot gas for operating a turbomachine fired with at least one combustion chamber includes premixing a fuel with a plurality of operating gases by introducing fuel into the plurality of operating gases in a mixing chamber disposed upstream of the combustion chamber using a burner arrangement, wherein the fuel includes at least one of a combustible gas and a H 2 -rich fuel; and introducing the premixed fuel into the combustion chamber.

What is claimed is: 
     
         1 . A burner arrangement disposed upstream of a combustion chamber comprising:
 a mixing chamber configured to premix a fuel with a plurality of operating gases; and   a swirler having at least two hollow partial conical shells nested one inside the other in a flow direction and complementing one another to form a body with an interior space, wherein a cross section of the interior space increases in the flow direction, wherein the at least two conical shells each have a wall and each have a longitudinal axis of symmetry, wherein the longitudinal axes of symmetry of the hollow shells run offset with respect to one another such that the walls of each shell are adjacent to each other and form a tangential air inlet slot extending longitudinally for an inflow of the air into the interior space.   
     
     
         2 . The burner arrangement as recited in  claim 1 , further comprising a mixing tube and a transition region disposed between the swirler and the mixing tube, the transition region containing transition passages for a transfer of a flow formed in the swirler and into a throughflow cross section of the mixer tube connected downstream of the transfer passages. 
     
     
         3 . The burner arrangement as recited in  claim 2 , wherein a number of the transfer passages corresponds to a number of the at least two shells. 
     
     
         4 . A burner arrangement disposed upstream of a combustion chamber comprising:
 a mixing chamber configured to premix a fuel with a plurality of operating gases; and   a swirler having at least two hollow partial shells nested one inside the other in a direction of flow and complementing one another to form a body with an interior space, wherein a cross section of the interior space is substantially cylindrical in a flow direction, and wherein the at least two hollow shells each have a wall and each have a longitudinal axis of symmetry, wherein the longitudinal axes of symmetry of the hollow shells run offset with respect to one another such that the walls of each shell are adjacent to each other and form a tangential air inlet slot extending longitudinally for an inflow of the air into the interior space, wherein the interior space includes an internal body having a decreasing cross section in the flow direction.   
     
     
         5 . The burner arrangement as recited in  claim 4 , wherein a size of the inner body decreases conically in the direction of flow. 
     
     
         6 . The burner arrangement as recited in  claim 4 , further comprising a mixing tube and a transition region disposed between the swirler and the mixing tube, the transition region containing transition passages for a transfer of a flow formed in the swirler and into a throughflow cross section of the mixer tube connected downstream of the transfer passages. 
     
     
         7 . The burner arrangement as recited in  claim 6 , wherein a number of the transfer passages corresponds to a number of the at least two shells.