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Using Boundary Conditions to Account for Mean Flow Effects in a Zero Mach Number Acoustic Solver

Motheau, Emmanuel and Nicoud, Franck and Poinsot, Thierry Using Boundary Conditions to Account for Mean Flow Effects in a Zero Mach Number Acoustic Solver. (2012) Journal of Engineering for Gas Turbines and Power, 134 (11). 1-8. ISSN 0742-4795

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Official URL: http://dx.doi.org/10.1115/1.4007198

Abstract

The present study is devoted to the modeling of mean flow effects while computing thermoacoustic modes under the zero Mach number assumption. It is first recalled that the acoustic impedance modelling a compressor or a turbine must be pre- scribed under an energetical form instead of the classical acous- tic variables. Then we demonstrate the feasibility to take into ac- count the coupling between acoustic and entropy waves in a zero Mach number framework to capture a family of low frequency entropic modes. The proposed approach relies on a new Delayed Entropy Coupled Boundary Condition (DECBC) and proves able to capture a family of Low frequency entropic mode even though no mean flow term is included into the fluctuating pressure equa- tion.

Item Type:Article
Additional Information:Thanks to ASME editor. The original publication is available at http://asmedigitalcollection.asme.org
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)
Laboratory name:
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Deposited By: Thierry POINSOT
Deposited On:11 Apr 2013 15:42

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