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Fluid Structure Interaction Problems in Turbomachinery Using RBF Interpolation and Greedy Algorithm

[+] Author Affiliations
Yannick Rozenberg

Université Claude Bernard Lyon 1, Villeurbanne, France

Stéphane Aubert, Guillaume Bénéfice

Ecole Centrale de Lyon, Ecully, France

Paper No. GT2014-26735, pp. V02BT39A033; 9 pages
doi:10.1115/GT2014-26735
From:
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 2B: Turbomachinery
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4561-5
  • Copyright © 2014 by ASME

abstract

In an effort to provide accurate simulations of fluid-structure interactions in turbomachinery, this paper describes a powerful method to deform mesh, using interpolation based on radial basis functions (RBF). It has been assessed on a 3D annular turbine, including a tip gap. The main difficulty of this method is to define number and position of control points. A greedy algorithm is proposed to address this issue and is tested on the annular turbine and a deforming panel placed in a shock tube. Finally, the method is slightly adapted to take into account periodic boundary conditions, which allow mesh morphing for a unique interblade channel by preserving constant pitch on lateral boundaries.

Copyright © 2014 by ASME

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