In this article, a fully three-dimensional computational modeling approach in the time and frequency domain is presented, which allows to accurately predicting fluid-structure interactions in pulse-charged mixed-flow turbocharger turbines. As part of the approach, a transient computational fluid mechanics analysis is performed based on the compressible inviscid Euler equations covering an entire engine cycle. The resulting harmonic orders of aerodynamic excitation are imposed in a forced response analysis of the respective eigenvector to determine effective stress amplitudes. The modeling approach is validated with experimental results based on various mixed-flow turbine designs. It is shown that the numerical results accurately predict the measured stress levels. The numerical approach can be used in the turbine design and optimization process. Aerodynamic excitation forces are the main reason for high cycle fatigue in turbocharger turbines and therefore a fundamental understanding is of key importance.
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e-mail: stephan.senn@ch.abb.com
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April 2011
Research Papers
Blade Excitation in Pulse-Charged Mixed-Flow Turbocharger Turbines
Stephan M. Senn,
Stephan M. Senn
Research and Development Turbochargers,
e-mail: stephan.senn@ch.abb.com
ABB Turbo Systems Ltd.
, CH-5401 Baden, Switzerland
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Martin Seiler,
Martin Seiler
Research and Development Turbochargers,
ABB Turbo Systems Ltd.
, CH-5401 Baden, Switzerland
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Ottmar Schaefer
Ottmar Schaefer
Research and Development Turbochargers,
ABB Turbo Systems Ltd.
, CH-5401 Baden, Switzerland
Search for other works by this author on:
Stephan M. Senn
Research and Development Turbochargers,
ABB Turbo Systems Ltd.
, CH-5401 Baden, Switzerlande-mail: stephan.senn@ch.abb.com
Martin Seiler
Research and Development Turbochargers,
ABB Turbo Systems Ltd.
, CH-5401 Baden, Switzerland
Ottmar Schaefer
Research and Development Turbochargers,
ABB Turbo Systems Ltd.
, CH-5401 Baden, SwitzerlandJ. Turbomach. Apr 2011, 133(2): 021012 (6 pages)
Published Online: October 21, 2010
Article history
Received:
July 24, 2009
Revised:
September 8, 2009
Online:
October 21, 2010
Published:
October 21, 2010
Citation
Senn, S. M., Seiler, M., and Schaefer, O. (October 21, 2010). "Blade Excitation in Pulse-Charged Mixed-Flow Turbocharger Turbines." ASME. J. Turbomach. April 2011; 133(2): 021012. https://doi.org/10.1115/1.4001186
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