Guide blade ring for an axial turbomachine and method for designing the guide blade ring

US9951648B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Christoph Richter · Berlin, DE
• Heinrich Stüer · Haltern, DE

Key dates

• Filing date: Apr 5, 2013
• Grant date: Apr 24, 2018
• Expiry date: Apr 18, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/4932
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for designing a stage for an axial turbomachine having a guide blade ring and a rotor blade ring arranged downstream of the guide blade ring is provided. The method includes: profiling a guide blade ring having guide blades arranged regularly over the circumference of the guide blade ring in accordance with basic aerodynamic and mechanical conditions; moving at least one profile section of at least one of the guide blades in the circumferential direction in such a way that the pitch angle for the at least one guide blade and a guide blade arranged adjacent thereto varies over the blade height in such a way that during operation of the axial turbomachine the departing flow formed downstream of the guide blade ring is irregularly formed over the circumference of the axial turbomachine, such that the vibration excitation of the rotor blades of the rotor blade ring is low.