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Numerical Calculation of Low Order Blade Excitation in Pulse Charged Axial Turbocharger Turbines and Its Experimental Assessment

[+] Author Affiliations
D. Filsinger, O. Schäfer

ABB Turbo Systems, Ltd., Baden, Switzerland

Paper No. GT2003-38182, pp. 311-320; 10 pages
doi:10.1115/GT2003-38182
From:
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 4: Turbo Expo 2003
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3687-8 | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME

abstract

Pulse charged turbocharger turbines are exposed to highly unsteady aerodynamic forces, which cause substantial blade vibrations. With respect to high cycle fatigue, the determination of the resonant vibration responses of the turbocharger blades rotating with variable speed is of great importance for a reliable and safe design. The first step to a numerical prediction of the blade’s loading by oscillations in low orders is the calculation of the aerodynamic excitation. This paper contains results of a study, which has been carried out at ABB Turbo Systems Ltd., to define the necessary numerical effort for the calculation of the low order blade excitation in pulse charged axial turbocharger turbines by means of computational fluid dynamics. The paper presents comparisons between experimental and numerical results concerning the unsteady loading of pulse charged axial turbocharger turbines. It shows the potential of quasi-three-dimensional computational fluid dynamics to predict the dynamic blade loading under real engine operation.

Copyright © 2003 by ASME
Topics: Turbines , Blades

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