Generation of combustion noise is here studied in a realistic turbine stage configuration, where the temperature fluctuations generated by an aeronautical burner (responsible of the direct combustion noise generation, often neglected in most of the studies) are modelled using a cylindrical fluctuating energy source term placed upstream of the inlet guide vanes. This modelling not only better accounts for the actual physical combustion noise generation phenomena, but also for the actual stratification of temperature at the combustor exit and covers a broader range of exciting frequencies as in actual engines. The temperature fluctuations generated by this realistic fluctuating energy source term are then convected through the turbine stage and the resulting noise is analyzed and compared with previous LES results with ideal monochromatic entropy forcing and analytical compact methods. New physical insight on the various noise generation mechanisms and mode conversion is also provided.
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ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
June 11–15, 2018
Oslo, Norway
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5100-5
PROCEEDINGS PAPER
Study of Combustion Noise Generation in a Realistic Turbine Stage Configuration
S. Moreau,
S. Moreau
Université de Sherbrooke, Sherbrooke, QC, Canada
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L. Y. M. Gicquel
L. Y. M. Gicquel
CERFACS, Toulouse, France
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C. Becerril
CERFACS, Toulouse, France
S. Moreau
Université de Sherbrooke, Sherbrooke, QC, Canada
L. Y. M. Gicquel
CERFACS, Toulouse, France
Paper No:
GT2018-75062, V02BT43A001; 17 pages
Published Online:
August 30, 2018
Citation
Becerril, C, Moreau, S, & Gicquel, LYM. "Study of Combustion Noise Generation in a Realistic Turbine Stage Configuration." Proceedings of the ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. Volume 2B: Turbomachinery. Oslo, Norway. June 11–15, 2018. V02BT43A001. ASME. https://doi.org/10.1115/GT2018-75062
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