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Full 3D Rotor/Stator Interaction Simulations in Aircraft Engines With Time-Dependent Angular Speed

[+] Author Affiliations
Alain Batailly

École Polytechnique de Montréal, Montréal, QC, Canada

Mathias Legrand

McGill University, Montréal, QC, Canada

Christophe Pierre

University of Illinois at Urbana-Champaign, Urbana, IL

Paper No. GT2016-56715, pp. V07AT32A009; 10 pages
doi:10.1115/GT2016-56715
From:
  • ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
  • Volume 7A: Structures and Dynamics
  • Seoul, South Korea, June 13–17, 2016
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4983-5
  • Copyright © 2016 by ASME

abstract

Modern aircraft engine designs feature reduced clearances that may initiate structural contacts between rotating and static components. A numerical strategy dedicated to the simulation of such interactions is here enriched in order to account for time-dependent angular speeds. This contribution first details the evolution of the numerical strategy before validating the developments by comparing numerical results with experimental observations made on an industrial test bench. Further numerical investigations allow to assess the sensitivity of numerical results to acceleration and deceleration rates. Results, obtained with and without abradable coating, underline the fundamental nonlinear nature of the analysed system. It is found that lower acceleration rates favour the arisal of interaction phenomena and that amplitudes of vibration at a given angular speed are generally lower when the blade decelerates.

Copyright © 2016 by ASME

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