Coolable segment for a turbomachinery and combustion turbine

摘要

The invention pertains to a coolable segment (1) for a turbo machinery (20), which turbo machinery (20) is operated with a hot fluid (29). The segment (1) comprises a cooling wall (2) extending in an axial direction (37) and in a circumerential direction (36) orthogonal to said axial direction (37); a hot fluid surface (3) to be exposed to the hot fluid (29). Between the wall (2) and the surface (3) a cooling structure (4) is arranged which is permeable to cooling fluid (5) and provides cooling surfaces (6) for cooling by heat transmission through radiation. The cooling structure (4) comprises either a netting, in particular a wire netting or a porous material. The invention further pertains to a combustion turbine (20) comprising a coolable segment (1).