Cowling part and combustor assembly for a gas turbine

Abstract

A covering part for a combustion chamber of a gas turbine is configured and provided to guide a fluid flow downstream of a diffuser of the gas turbine at least partially into a flow area outside of a combustion space of the combustion chamber so as to cool a combustion chamber wall that delimits the combustion space and has at least one mounting edge at which at least one attachment site is provided for fixating the covering part at the combustion chamber wall by means of a separate attachment element. At least one guiding element is provided at the covering part in the area of the mounting edge, which during operation of the gas turbine guides the partial flow of the fluid flow to be guided in the direction of the flow area over and above a part of the attachment element that protrudes from the mounting edge.

1 . A covering part for a combustion chamber of a gas turbine, wherein the covering part
 is configured and provided to guide a fluid flow downstream of a diffuser of the gas turbine at least partially into a flow area outside of a combustion space of the combustion chamber to cool a combustion chamber wall that delimits the combustion space, and wherein it   has at least one mounting edge at which at least one attachment site is provided for fixating the covering part at the combustion chamber wall by means of a separate attachment element,   wherein at least one guiding element is provided at the covering part in the area of the mounting edge that guides the partial flow of the fluid flow to be guided in the direction of the flow areas over and above a part of the attachment element that protrudes from the mounting edge during operation of the gas turbine.   
     
     
         2 . The covering part according to  claim 1 , wherein the at least one guiding element extends at least beyond a section of the mounting edge. 
     
     
         3 . The covering part according to  claim 2 , wherein the guiding element has a recess through which an attachment element that engages at the mounting edge for fixing the covering part is accessible, and/or through which an attachment element can be guided to the mounting edge for the purpose of fixating the covering part. 
     
     
         4 . The covering part according to  claim 1 , wherein the at least one guiding element is formed at the covering part. 
     
     
         5 . The covering part according to  claim 4 , wherein the mounting edge is formed in one piece with the guiding element. 
     
     
         6 . The covering part according to  claim 5 , wherein the mounting edge is bent with respect to a section of the covering part that forms the guiding element, so that the section of the covering part that forms the guiding element is positioned opposite the mounting edge. 
     
     
         7 . The covering part according to  claim 6 , wherein the mounting edge is bent with respect to a section of the covering part that forms the guiding element by at least 160°. 
     
     
         8 . The covering part according to  claim 1 , wherein at least one additional guiding element is provided at the covering part, by which a gap present between the guiding element and the adjacent combustion chamber wall is bridged when the covering part is in a state where it is installed according to the intended use. 
     
     
         9 . The covering part according to  claim 8 , wherein the additional guiding element is welded onto the covering part. 
     
     
         10 . The covering part according to  claim 1 , wherein the covering part is provided for fixation at an inner as well as at an outer combustion chamber wall, which together delimit the combustion space. 
     
     
         11 . The covering part according to  claim 10 , wherein at least one guiding element is provided at the covering part in the area of respectively one of at least two mounting edges, via which the covering part is fixated, on the one hand, at the outer combustion chamber wall and, on the other hand, at the inner combustion chamber wall. 
     
     
         12 . A combustion chamber assembly group for a gas turbine, with
 an inner and an outer combustion chamber wall, which together delimit a combustion space of the combustion chamber and define two flow areas that are separated from each other by the combustion space,   a combustion chamber head, which is arranged downstream of a diffuser of the gas turbine and via which a part of a fluid flow can reach the interior of the combustion space, and   a covering part according to  claim 1  that is fixated in the area of the combustion chamber head.   
     
     
         13 . The covering chamber assembly group according to  claim 12 , wherein the mounting edge extends at least in the area of the attachment site substantially perpendicular or in parallel to a turbine axis. 
     
     
         14 . The covering chamber assembly group according to  claim 12 , wherein the covering part can be connected to a combustion chamber wall and a separate combustion chamber head plate, at which a fuel nozzle for injecting fuel into the combustion space is supported, in the area of the mounting edge of the covering part via a single attachment element. 
     
     
         15 . A gas turbine engine with a covering part according to  claim 1 .