Patent ID: 6183199
Filing Date: 2001-02-06
Classification: B23P,F01D,F05D

Abstract:
A cooled wall having an outer surface, which is exposed to a hot-gas flow, which flows along the outer surface (12) in the downstream direction, an inner surface, and at least one film-cooling hole has a diffuser section and an outlet at the outer surface, the axis of the film-cooling hole being directed in such a way that a cooling-medium flow from the outlet is directed in such a way that it has a velocity component in the downstream direction, the diffuser section having a first internal surface, which is rounded in the form of at least two compound curves, at a distance from a second internal surface, the first and second internal surfaces intersecting the outer surface of the wall, and the intersection edge between the first internal surface and the outer surface forming an upstream edge of the outlet, and the intersection edge between the second internal surface and the outer surface forming a downstream edge of the outlet, the diffuser section having side surface, which face one another, connect the first and second internal surfaces and diverge from one another toward the outlet of the diffuse section, wherein the first internal surface of the diffuser section is rounded toward the axis of the film-cooling hole.