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Transmission and reflection of acoustic and entropy waves through a stator–rotor stage

Bauerheim, Michaël and Duran, Ignacio and Livebardon, Thomas and Wang, Gaofeng and Moreau, Stéphane and Poinsot, Thierry Transmission and reflection of acoustic and entropy waves through a stator–rotor stage. (2016) Journal of Sound and Vibration, 374. 260-278. ISSN 0022-460X

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Official URL: http://doi.org/10.1016/j.jsv.2016.03.041


The propagation of acoustic, entropy and vorticity waves through turbine stages is of significant interest in the field of core noise. In particular, entropy spots have been shown to generate significant noise when accelerated through turbine stages: the so-called indirect combustion noise. Analytical models for the propagation of acoustic, vorticity and entropy waves through a stator vane, developed since the seventies, are generally based on restrictive assumptions such as low frequency waves. In order to analyze such assumptions, the theory of Cumpsty and Marble is extended to rotating rows and applied to a 2D stator–rotor turbine stage. The theoretical transfer functions are then compared with numerical predictions from forced compressible Large-Eddy Simulations of a 2D stator–rotor configuration, using a fluid–fluid coupling strategy with an overset-grid method. The comparisons between the analytical model and the simulations are in good agreement. To improve the analytical predictions, the attenuation due to the entropy spot deformation through the stator vane or the rotor blade is then included, modeled either analytically or extracted from the mean flow of the simulations. The complete analytical model reveals a good agreement with 2D simulations, which allows the prediction and minimization of both direct and indirect noise at the design-stage without computation.

Item Type:Article
HAL Id:hal-01516110
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 - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Centre Européen de Recherche et Formation Avancées en Calcul Scientifique - CERFACS (FRANCE)
Other partners > Ecole Centrale de Lyon (FRANCE)
Other partners > Institut National des Sciences Appliquées - INSA (FRANCE)
Other partners > Université de Lyon - UDL (FRANCE)
Other partners > Université de Sherbrooke (CANADA)
Laboratory name:
Deposited On:30 Apr 2019 12:24

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