초록 ▼

A shroud assembly for a gas turbine engine consists of a housing having a boundary wall and a gas contacting skin, the wall and skin being in segmented form. The skin consists of a thin metal sheet attached to the boundary wall, and a ceramic gas contacting coating. The skin is impingement cooled by

A shroud assembly for a gas turbine engine consists of a housing having a boundary wall and a gas contacting skin, the wall and skin being in segmented form. The skin consists of a thin metal sheet attached to the boundary wall, and a ceramic gas contacting coating. The skin is impingement cooled by cooling air flowing through apertures in the boundary wall, and the cooling air exhausts into the gas flow through passages. The use of a thin metal sheet with a ceramic coating promotes favorable temperature gradients in the skin enabling the coating to run at optimum conditions for maximum cooling effect.

대표청구항 ▼

A shroud assembly for a gas turbine engine comprising: a housing defined in part by a relatively thick and stiff boundary wall member, said boundary wall member having apertures for through flow of a cooling fluid, said boundary wall member further having a plurality of projections extending away fr

A shroud assembly for a gas turbine engine comprising: a housing defined in part by a relatively thick and stiff boundary wall member, said boundary wall member having apertures for through flow of a cooling fluid, said boundary wall member further having a plurality of projections extending away from said housing, and a skin attached to said projections of said boundary wall member to define a plurality of spaces therewith into which said cooling fluid flows from said apertures in said boundary wall member, said skin defining in part an annular passage in the gas turbine engine for through flow of motive gases, said skin comprising an inner relatively thin, flexible metallic layer as compared to said boundary wall member and an outer layer of ceramic coating for contact by said motive gases, said boundary wall member and said skin further defining outlet passages for exhausting said cooling fluid adjacent a downstream end of the shroud assembly.