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Impact of symmetry breaking on the Flame Transfer Function of a laminar premixed flame

Kaiser, Thomas and Oztarlik, Gorkem and Selle, Laurent and Poinsot, Thierry Impact of symmetry breaking on the Flame Transfer Function of a laminar premixed flame. (2019) Proceedings of the Combustion Institute, 37 (2). 1953-1960. ISSN 1540-7489

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Official URL: https://doi.org/10.1016/j.proci.2018.06.047

Abstract

This work presents a numerical study of the acoustic response of a laminar flame with tunable asymmetry. A V-shaped premixed flame is stabilised in the wake of a cylindrical flame holder that can be rotated. The configuration is symmetric when the flame holder is fixed but increasing its rotation rate breaks the symmetry of the flow. This configuration is submitted to acoustic forcing to measure the effect of rotation of the flame holder on the Flame Transfer Functions. It appears that the asymmetry of the two flame branches changes their respective time delays, resulting in interference in the global unsteady heat release rate fluctuations. Consequently, the Flame Transfer Function exhibits dips and bumps, which are studied via laminar Direct Numerical Simulation. Potential applications for the control of combustion instabilities are discussed.

Item Type:Article
HAL Id:hal-02048422
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)
Laboratory name:
Funders:
European Commission - Grand Equipement National de Calcul Intensif - GENCI (FRANCE)
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Deposited On:25 Feb 2019 14:22

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