Impingement cooling mechanism, turbine blade, and combustor

Abstract

It has a flat impingement hole ( 2 ) of which the opening width (D 1 ) in the flow direction of a crossflow (F) in the gap between a cooling target ( 10 ) and an opposing member ( 20 ) is set greater than the opening width (D 2 ) in a direction orthogonal with the flow direction of the crossflow F. Accordingly, the cooling efficiency is further improved by the impingement cooling mechanism.

1 . An impingement cooling mechanism comprising:
 a cooling target;   an opposing member that is arranged opposing the cooling target; and   a plurality of impingement holes formed in the opposing member,   that blows out cooling gas from the plurality of impingement holes toward the cooling target;   wherein the impingement cooling mechanism has as the impingement hole at least one flat impingement hole of which the opening width in the flow direction of a crossflow in the gap between the cooling target and the opposing member is greater than the opening width in a direction orthogonal with the flow direction of the crossflow in the gap.   
     
     
         2 . The impingement cooling mechanism according to  claim 1 , wherein the direction in which the opening width of the flat impingement hole becomes the maximum is parallel with the flow direction of a crossflow in the gap between the cooling target and the opposing member. 
     
     
         3 . The impingement cooling mechanism according to  claim 1 , further comprising a turbulent flow forming member that is arranged exposed to a crossflow in the gap between the cooling target and the opposing member. 
     
     
         4 . The impingement cooling mechanism according to  claim 2 , further comprising a turbulent flow forming member that is arranged exposed to a crossflow in the gap between the cooling target and the opposing member. 
     
     
         5 . The impingement cooling mechanism according to  claim 3 , wherein the turbulent flow forming member is a protrusion or concavity that is arranged opposing the flat impingement hole and fixed to the cooling target. 
     
     
         6 . The impingement cooling mechanism according to  claim 4 , wherein the turbulent flow forming member is a protrusion or concavity that is arranged opposing the flat impingement hole and fixed to the cooling target. 
     
     
         7 . A turbine blade comprising the impingement cooling mechanism according to  claim 1 . 
     
     
         8 . A turbine blade comprising the impingement cooling mechanism according to  claim 2 . 
     
     
         9 . A turbine blade comprising the impingement cooling mechanism according to  claim 3 . 
     
     
         10 . A turbine blade comprising the impingement cooling mechanism according to  claim 4 . 
     
     
         11 . A turbine blade comprising the impingement cooling mechanism according to  claim 5 . 
     
     
         12 . A turbine blade comprising the impingement cooling mechanism according to  claim 6 . 
     
     
         13 . A combustor comprising the impingement cooling mechanism according to  claim 1 . 
     
     
         14 . A combustor comprising the impingement cooling mechanism according to  claim 2 . 
     
     
         15 . A combustor comprising the impingement cooling mechanism according to  claim 3 . 
     
     
         16 . A combustor comprising the impingement cooling mechanism according to  claim 4 . 
     
     
         17 . A combustor comprising the impingement cooling mechanism according to  claim 5 . 
     
     
         18 . A combustor comprising the impingement cooling mechanism according to  claim 6 .