초록 ▼

An annular turbine shroud separates a hot gas path from a cooling plenum containing a cooling medium. Bumps are cast in the surface on the cooling side of the shroud. A surface coating overlies the cooling side surface of the shroud, including the bumps, and contains cooling enhancement material. Th

An annular turbine shroud separates a hot gas path from a cooling plenum containing a cooling medium. Bumps are cast in the surface on the cooling side of the shroud. A surface coating overlies the cooling side surface of the shroud, including the bumps, and contains cooling enhancement material. The surface area ratio of the cooling side of the shroud with the bumps and coating is in excess of a surface area ratio of the cooling side surface with bumps without the coating to afford increased heat transfer across the element relative to the heat transfer across the element without the coating.

대표청구항 ▼

1. A turbine component comprising an element separating a high-temperature region and a cooling medium from one another, said element on a cooling medium side thereof having a surface with discrete bumps separated from one another and projecting from said surface, said surface with said discrete bum

1. A turbine component comprising an element separating a high-temperature region and a cooling medium from one another, said element on a cooling medium side thereof having a surface with discrete bumps separated from one another and projecting from said surface, said surface with said discrete bumps defining a predetermined ratio of the area of said surface with said bumps and the area of said surface without said bumps, a surface coating on said cooling medium side of said element overlying said surface with discrete bumps forming a cooling side surface having a ratio of the area of said coated surface with said bumps and the area of said surface with said bumps without said coating in excess of said predetermined surface area ratio to afford increased heat transfer between the cooling medium and the element relative to the heat transfer between the cooling medium and the element without said coating.