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Modeling Contact Dynamics of Vanes With Adjustable Upstream Flow Angles

[+] Author Affiliations
Daniel Schurzig, Sebastian Tatzko, Lars Panning-von Scheidt, Jörg Wallaschek

Leibniz Universität Hannover, Hannover, Germany

Paper No. GT2012-68185, pp. 1169-1179; 11 pages
doi:10.1115/GT2012-68185
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 7: Structures and Dynamics, Parts A and B
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4473-1
  • Copyright © 2012 by ASME

abstract

In this paper, a simulation method is proposed for a sub-category of compressor vanes showing nonlinear behavior due to an adjustable upstream flow angle. The proposed algorithm computes the forced response of a single vane based on the New-mark time stepping scheme after reducing the structural matrices using the Craig-Bampton method. The contacts are modeled by Coulomb friction and Newton impact constraints. Contact forces are determined using linear complementarity conditions with decoupled orthogonal friction force directions. Different discretization methods for the cylindrical contact partners are proposed. Finally, numerical results are shown in order to validate the proposed algorithms.

Copyright © 2012 by ASME

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