Cooled component for a gas turbine

Abstract

A cooled component for a gas turbine is disclosed, which by an outer side of a wall delimits hot gas passage of the gas turbine and on an inner side has a device for impingement cooling. The impingement cooling device can include a multiplicity of impingement cooling chambers which are arranged next to each other, operate in parallel, are covered by impingement cooling plates which are equipped with impingement cooling holes, and are impinged upon by cooling air during operation.

We claim: 
     
         1 . A cooled component for a gas turbine, which comprises:
 a wall having an outer side which delimits hot gas passage of a gas turbine, and an inner side;   a device for impingement cooling on the inner side, wherein the impingement cooling device has a multiplicity of impingement cooling chambers which are arranged next to each other for operation in parallel and for impringement upon by cooling air; and   impingement cooling plates which cover the impingement cooling chambers and which are equipped with impingement cooling holes, wherein the impingement cooling chambers are placed to communicate with hot gas passage via separate film cooling holes, and wherein at least one of density and/or distribution and/or diameter or flow cross section of the impingement cooling holes in the impingement cooling plates of the individual impingement cooling chambers is selected with respect to thermal loading and/or static pressure which will occur during operation on the outer side of the wall.   
     
     
         2 . The cooled component as claimed in  claim 1 , in combination with a gas turbine, wherein the component is a blade provided with a platform, of the gas turbine, and the impingement-cooled wall is a wall of the platform. 
     
     
         3 . The cooled component as claimed in  claim 2 , wherein the platform is integrated into a sequential cooling of the blade, the platform and a blade airfoil of the blade being placed for exposure to throughflow by a cooling medium during operation. 
     
     
         4 . The cooled component as claimed in  claim 1 , wherein the blade comprises:
 a blade airfoil with a leading edge and a trailing edge; and   at least one of the impingement cooling chambers, which is arranged downstream of the trailing edge, and designed for intensified cooling by its impingement cooling plate, which is matched to an increased thermal loading due to wake turbulence which develops at the trailing edge.   
     
     
         5 . The cooled component as claimed in  claim 1 , wherein the component is a heat shield. 
     
     
         6 . The cooled component as claimed in  claim 5 , wherein the heat shield is provided with impingement cooling in different impingement cooling chambers. 
     
     
         7 . The cooled component as claimed in  claim 1 , wherein the impingement cooling chambers are directly adjacent one another. 
     
     
         8 . The cooled component as claimed in  claim 2 , wherein the component is a stator blade. 
     
     
         9 . A gas turbine comprising:
 a cooled gas turbine blade component having a wall with an outer side which delimits hot gas passage of a gas turbine, and an inner side;
 a device for impingement cooling on the inner side, wherein the impingement cooling device has a multiplicity of impingement cooling chambers which are arranged next to each other for operation in parallel and for impringement upon by cooling air; and 
 impingement cooling plates which cover the impingement cooling chambers and which are equipped with impingement cooling holes, wherein the impingement cooling chambers are placed to communicate with hot gas passage via separate film cooling holes, and wherein at least one of density and/or distribution and/or diameter or flow cross section of the impingement cooling holes in the impingement cooling plates of the individual impingement cooling chambers is selected with respect to thermal loading and/or static pressure which will occur during operation on the outer side of the wall.