Patent ID: 7658076
Filing Date: 2010-02-09
Classification: F01D,F05D,F23M,F23R

Abstract:
1. An open-cooled blade for a gas turbine, comprising: a root portion; and an airfoil portion, wherein the airfoil portion comprises: an outer wall exposed to a hot gas, a first cavity partly defined by the outer wall and for a first medium, a plurality of through-openings arranged in the outer wall where the through-openings open into the first cavity on a first side and into the hot-gas space on a second side, and a second cavity for admixing a second medium, the second cavity being fluidically connected to the through-openings, wherein the second cavity is formed by supply passages that are provided in the outer wall and are connected via transverse passages to the through-openings designed as through-bores, so that the two media cannot be mixed until inside the through-bores, wherein the first medium is a different substance than the second medium.