Alstom

Jörgen Ferber

Bernhard Weigand

Rainer Höcker

Gordon David Anderson

Fathi Tarada

A thermally highly loaded machine component (), which is protected from overheating by film cooling, is provided with conical cooling passages () of circular cross section. The cooling passages are designed so as to be divergent from the cold-gas side () toward the hot-gas side. The conical cooling passages, as compared with cylindrical passages with regard to the mass flow of cooling medium () fed through the cooling passages, are substantially less dependent on the pressure ratio between the cold-gas side () and hot-gas side () of the component. The straight conical cooling passages of round cross section throughout may be produced in a very simple manner by laser drilling, with a convergent cutting beam being used for the machining.

Cooled components with conical cooling passages

The invention relates to an impact flow for wall sections including a plurality of impact openings which are arranged on a plane in a flat or curved support. The support is fitted it a distance from the wall section, and the impact surface of the wall section that is to be cooled is configured as a bulged relief. The bulge elements are arranged around the impact surface of the impact beam. The surfaces of the bulge elements facing the impact beam include two curves which blend into one another.

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Küssaberg, Germany

Jörgen Ferber