Blade for gas turbines with choke cross section at the trailing edge

US6481966B2 · kind B2 · utility

Assignee

• ALSTOM (Switzerland) Ltd · CH

Inventors

• Alexander Beeck · Orlando, US
• Jorgen Ferber · Waldshut-Tiengen, DE
• Christoph Nagler · Zürich, CH
• Lothar Schneider · Biebertal, DE
• Klaus Semmler · Lauchringen, DE

Key dates

• Filing date: Dec 19, 2000
• Grant date: Nov 19, 2002
• Expiry date: Dec 19, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2240/304
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a gas-turbine guide element (30) around which a hot air flow (23) flows and which, at least in a trailing edge region (21), in which the air flow (23) separates from the guide element (30), comprises at least two walls (10, 11) arranged essentially in parallel and connected to one another by ribs (16, 17, 20) in such a way as to form internal cooling passages (18, 19, 25, 26, 27), and which is cooled on the inside with cooling medium (28, 29) flowing through the cooling passages (18, 19, 25, 26, 27), the cooling medium discharging from the guide element (30) at the trailing edge (21) essentially parallel to and between the walls (10, 11), and in a method of producing it, easier reworking and less susceptibility to foreign particles are achieved owing to the fact that at least some of the ribs are arranged as choke ribs (24) so as to terminate essentially flush with the trailing edge (21).