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Detailed Investigation of RANS and LES Predictions of Loss Generation in an Axial Compressor Cascade at Off Design Incidences

[+] Author Affiliations
John Leggett

University of Southampton, Southampton, UK

Stephan Priebe

GE Global Research, Niskayuna, NY

Richard Sandberg

University of Melbourne, Melbourne, Australia

Vittorio Michelassi

GE Aviation, Florence, Italy

Aamir Shabbir

GE Aviation, Cincinnati, OH

Paper No. GT2016-57972, pp. V02AT37A050; 13 pages
  • ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
  • Volume 2A: Turbomachinery
  • Seoul, South Korea, June 13–17, 2016
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4969-9
  • Copyright © 2016 by ASME


In the design of modern jet engines the need for accurate loss prediction techniques is ever present. The most common tool currently in use is Reynolds Averaged Navier-Stokes model which provides good estimation at design conditions but can struggle with off design conditions. With accuracy being such an important requirement, an alternative method such as Large Eddy Simulation presents an opportunity to improve and assess the off design performance.

Although still limited by computational resources, the use of Large Eddy Simulations in conjunction with more detailed loss analysis methods forms a powerful tool for assessing and improving current Reynolds Averaged Navier-Stokes techniques. The simulations performed here are an incidence sweep at off-design conditions with free stream turbulence. The results of the two methodologies are compared with the use of loss breakdown analysis and the best practice of applying the loss breakdown technique to compressors is outlined.

Copyright © 2016 by ASME



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