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Simulation and modelling of the waves transmission and generation in a stator blade row in a combustion-noise framework

Leyko, Matthieu and Duran, Ignacio and Moreau, Stéphane and Nicoud, Franck and Poinsot, Thierry Simulation and modelling of the waves transmission and generation in a stator blade row in a combustion-noise framework. (2014) Journal of Sound and Vibration, 333 (23). 6090-6106. ISSN 0022-460X

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Official URL: http://dx.doi.org/10.1016/j.jsv.2014.06.034

Abstract

The combustion noise in aero-engines is known to have two different origins. First, the direct combustion noise is directly generated by the flame itself. Second, the indirect combustion noise is caused by the acceleration in the turbine stages of entropy spots generated by the combustion. In both cases, the turbo-machinery is involved in the combustion-noise transmission and generation. Numerical simulations are performed in the present study to assess the global noise for a real aeronautical configuration. On the one hand, the acoustic and entropy transfer functions of an isolated blade row are obtained using two-dimensional unsteady simulations. The transfer functions of the blade row are compared with the model of Cumpsty and Marble that assumes an axially compact configuration. On the other hand, the acoustic and entropy sources coming from a combustion chamber are calculated from a three-dimensional Large Eddy Simulation (LES). This allows an evaluation of the error introduced by the model for the present combustion chamber using the previous numerical simulations. A significant error is found for the indirect combustion noise, whereas it stays reasonable for the direct one.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Sound and Vibration website : http://www.sciencedirect.com/science/journal/0022460X
HAL Id:hal-01115728
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Montpellier 2 (FRANCE)
Other partners > Société nationale d'étude et de constructions de moteurs d'avion - SNECMA (FRANCE)
Other partners > Université de Sherbrooke (CANADA)
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Deposited By: Thierry POINSOT
Deposited On:11 Feb 2015 16:05

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