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Aerodynamic Design and Testing of an Axial Flow Compressor for the GT24/26 Gas Turbines

[+] Author Affiliations
Damir Novak, Michael Loetzerich, Matthias Boese

Alstom Power, Baden, Switzerland

Paper No. GT2013-95067, pp. V06AT35A025; 11 pages
  • ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
  • Volume 6A: Turbomachinery
  • San Antonio, Texas, USA, June 3–7, 2013
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5522-5
  • Copyright © 2013 by Alstom Technology


A 22-stage axial flow compressor with a pressure ratio 35:1 has been designed, built and successfully tested for a heavy-duty gas turbine application. Advanced technology and aero engine design tools have been used. The compressor has been designed using an “arbitrary” airfoil blading including 3D design features, like leading edge re-camber, lean, sweep and flowpath contouring.

The compressor performance and part load behavior have been improved by accurate stage matching based on whole compressor 3D analyses. The new compressor has been tested in a scaled down rig and validated in the Alstom Test Power Plant (ATPP).The compressor met all design objectives and demonstrated excellent performance.

This paper describes the aerodynamic design and test results.

Copyright © 2013 by Alstom Technology



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