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Very Large Eddy Simulation (VLES) of a Squealer Tipped Axial Turbine Stage

[+] Author Affiliations
Ryan Kelly, Aleksandar Jemcov, Joshua D. Cameron, Scott C. Morris

University of Notre Dame, South Bend, IN

Jesse Coffman

Air Force Research Laboratory, Wright-Patterson, OH

Malak F. Malak

Honeywell Aerospace, Phoenix, AZ

Paper No. GT2017-64979, pp. V02BT41A052; 12 pages
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 2B: Turbomachinery
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5079-4
  • Copyright © 2017 by ASME


This work presents numerical simulation results of a single stage axial turbine consisting of a nozzle and squealer tipped rotor. The VLES method is a hybrid URANS/LES method based on the standard k-ω SST and Coherent Structure LES turbulence models. The simulations were performed at the stage aerodynamic design point (ADP) and the results were validated against high-quality steady experimental data acquired at the University of Notre Dame’s axial transonic research turbine (TRT) facility. Along with the experimental validation, the VLES simulation results were further compared to those predicted using URANS highlighting the benefits of VLES compared to traditional predictive methods. All simulations were performed using a RANS-type grid density to highlight the efficiency of the VLES method and improved performance prediction.

Copyright © 2017 by ASME



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