Two stage serial impingement cooling for isogrid structures

摘要

A system for cooling a wall (24) of a component having an outer surface with raised ribs (12) defining a structural pocket (10), including: an inner wall (26) within the structural pocket and separating the wall outer surface within the pocket into a first region (28) outside of the inner wall and a second region (40) enclosed by the inner wall; a plate (14) disposed atop the raised ribs and enclosing the structural pocket, the plate having a plate impingement hole (16) to direct cooling air onto an impingement cooled area (38) of the first region; a cap having a skirt (50) in contact with the inner wall, the cap having a cap impingement hole (20) configured to direct the cooling air onto an impingement cooled area (44) of the second region, and; a film cooling hole (22) formed through the wall in the second region.

主权项

1. A system for cooling a wall of a gas turbine engine component heated by a flow of a hot gas across an inner surface of the wall, the wall having an outer surface comprising raised ribs defining a plurality of structural pockets, the system comprising:
an inner wall within each structural pocket, the inner wall extending from the wall outer surface within a respective structural pocket and separating the wall outer surface within the respective structural pocket into a first region outside of the inner wall and a second region enclosed by the inner wall, wherein the inner wall is spaced apart from the raised ribs, and an outer surface of the inner wall in contact with the first region and enclosing an inner surface of the inner wall; a plate disposed atop the raised ribs and enclosing the plurality of structural pockets, the plate comprising a plurality of plate impingement holes, each configured to direct cooling air from outside each respective structural pocket onto an impingement cooled area of the first region within each respective structural pocket; a cap within each structural pocket, comprising a skirt that extends toward the wall and that is in contact with the outer surface of the inner wall within each respective structural pocket, wherein the skirt encloses the inner wall and configured to secure the cap in position over the respective second region, the cap comprising a cap impingement hole configured to direct the cooling air that has impingement cooled the respective first region onto an impingement cooled area of the respective second region, and; a film cooling hole formed through the wall in the second region for removing the cooling air from the respective structural pocket.