To decrease emissions from combustion systems, lean premixed combustion is used. A disadvantage is the higher sensitivity to combustion instabilities, leading to increased sound pressure levels in the combustor and resulting in an increased excitation of the surrounding structure: the liner. This causes fatigue, which limits the lifetime of the combustor. This paper presents a joint experimental and numerical investigation of this acoustoelastic interaction problem for frequencies up to . To study this problem experimentally, a test setup has been built consisting of a single burner, , combustion system. The thin structure (liner) is contained in a thick pressure vessel with optical access for a traversing laser vibrometer system to measure the vibration levels of the liner. The acoustic excitation of the liner is measured using pressure sensors measuring the acoustic pressures inside the combustion chamber. For the numerical model, the finite element method with full coupling between structural vibration and acoustics is used. The flame is modeled as an acoustic volume source corresponding to a heat release rate that is frequency independent. The temperature distribution is taken from a Reynolds averaged Navier Stokes (RaNS) computational fluid dynamics (CFD) simulation. Results show very good agreement between predicted and measured acoustic pressure levels. The predicted and measured vibration levels also match fairly well.
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September 2008
Research Papers
Acoustoelastic Interaction in Combustion Chambers: Modeling and Experiments
R. A. Huls,
R. A. Huls
Faculty of Engineering Technology, Section of Applied Mechanics,
University of Twente
, P.O. Box 217, 7500 AE Enschede, The Netherlands
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J. F. van Kampen,
J. F. van Kampen
Faculty of Engineering Technology, Section of Thermal Engineering,
University of Twente
, P.O. Box 217, 7500 AE, Enschede, The Netherlands
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P. J. M. van der Hoogt,
P. J. M. van der Hoogt
Faculty of Engineering Technology, Section of Applied Mechanics,
University of Twente
, P.O. Box 217, 7500 AE Enschede, The Netherlands
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J. B. W. Kok,
J. B. W. Kok
Faculty of Engineering Technology, Section of Thermal Engineering,
University of Twente
, P.O. Box 217, 7500 AE, Enschede, The Netherlands
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A. de Boer
A. de Boer
Faculty of Engineering Technology, Section of Applied Mechanics,
University of Twente
, P.O. Box 217, 7500 AE Enschede, The Netherlands
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R. A. Huls
Faculty of Engineering Technology, Section of Applied Mechanics,
University of Twente
, P.O. Box 217, 7500 AE Enschede, The Netherlands
J. F. van Kampen
Faculty of Engineering Technology, Section of Thermal Engineering,
University of Twente
, P.O. Box 217, 7500 AE, Enschede, The Netherlands
P. J. M. van der Hoogt
Faculty of Engineering Technology, Section of Applied Mechanics,
University of Twente
, P.O. Box 217, 7500 AE Enschede, The Netherlands
J. B. W. Kok
Faculty of Engineering Technology, Section of Thermal Engineering,
University of Twente
, P.O. Box 217, 7500 AE, Enschede, The Netherlands
A. de Boer
Faculty of Engineering Technology, Section of Applied Mechanics,
University of Twente
, P.O. Box 217, 7500 AE Enschede, The NetherlandsJ. Eng. Gas Turbines Power. Sep 2008, 130(5): 051505 (8 pages)
Published Online: June 16, 2008
Article history
Received:
March 6, 2007
Revised:
March 4, 2008
Published:
June 16, 2008
Citation
Huls, R. A., van Kampen, J. F., van der Hoogt, P. J. M., Kok, J. B. W., and de Boer, A. (June 16, 2008). "Acoustoelastic Interaction in Combustion Chambers: Modeling and Experiments." ASME. J. Eng. Gas Turbines Power. September 2008; 130(5): 051505. https://doi.org/10.1115/1.2938391
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