Airfoil for a turbomachine

US11248474B2 · kind B2 · utility

Assignee

• MTU Aero Engines AG · DE

Inventors

• Franz-Joseph Ertl · Munich, DE
• Hans-Peter Hackenberg · Olching, DE
• Alexander Buck · Munich, DE
• Oskar Ostermeir · Kottgeisering, DE

Key dates

• Filing date: Jun 7, 2019
• Grant date: Feb 15, 2022
• Expiry date: Jun 7, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T50/60
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An airfoil for disposition and exposure to flow in a hot gas duct of a turbomachine is provided. The airfoil has a suction-side wall and a pressure-side wall with respect to its exposure to the flow in the gas duct, the side walls converging in an upstream end region toward a leading edge and converging in a downstream end region toward a trailing edge. The airfoil further has a cavity structure therein which is enclosed between an inner wall surface of the suction-side wall and an inner wall surface of the pressure-side wall when viewed in a cross-sectional plane axially parallel to a longitudinal axis of the turbomachine. When viewed in the cross-sectional plane, at least one of the inner wall surfaces, normalized to a mean camber line of the airfoil as a reference, extends with a change in curvature into at least one of the end regions in such a way that a clearance width of the cavity structure is increased at the at least one end region.