Comptes Rendus
Combustion, flow and spray dynamics for aerospace propulsion
Data assimilation applied to combustion
Comptes Rendus. Mécanique, Volume 341 (2013) no. 1-2, pp. 266-276.

Data assimilation is a sophisticated technique, yet not available in combustion, that combines measurements to model simulation and account for uncertainties in order to improve the numerical prediction of a system. In the context of gas turbines, data assimilation may be used for example to improve the prediction of flame ignition and propagation by a smart analysis of images and measurements. A first illustration of data assimilation is given in a simple case, where synthetic time-evolving positions of the flame front are assimilated to calibrate parameters of a premixed flame model. Its successful application in the context of natural fire propagation assesses the predictive capacity of the technique and the resulting higher fidelity in the data-driven simulations.

Lʼassimilation de données, encore inappliquée en combustion, combine mesures et simulations en tenant compte des incertitudes afin dʼaméliorer la prévision numérique dʼun système. Dans le contexte des turbines à gaz, lʼassimilation de données peut être utilisée par exemple pour améliorer lʼestimation de lʼallumage et de la propagation de la flamme, grâce à une exploitation plus poussée de données telles que des images ou des mesures ponctuelles. Une première illustration de lʼassimilation de données est présentée pour la prédiction de la propagation dʼun front de flamme dans un cas test simple. Dans cet exemple, les positions du front de flamme au cours du temps sont assimilées pour caler les paramètres dʼun modèle de flamme prémélangée. La capacité de prédiction des simulations obtenues par assimilation de données est finalement démontrée dans un cas réel de propagation de feux naturels.

Published online:
DOI: 10.1016/j.crme.2012.10.011
Keywords: Combustion, Data assimilation, Fire propagation
Mot clés : Combustion, Assimilation de données, Propagation de feux

Mélanie C. Rochoux 1, 2, 3; Bénédicte Cuenot 1; Sophie Ricci 4; Arnaud Trouvé 5; Blaise Delmotte 4, 5; Sébastien Massart 4; Roberto Paoli 4; Ronan Paugam 6

1 CERFACS, 42, avenue Gaspard-Coriolis, 31057 Toulouse cedex 01, France
2 École centrale Paris, grande voie des vignes, 92295 Châtenay-Malabry, France
3 UPR EM2C-CNRS, UPR-288, grande voie des vignes, 92295 Châtenay-Malabry, France
4 URA CERFACS-CNRS, URA-1875, 42, avenue Gaspard-Coriolis, 31057 Toulouse cedex 01, France
5 Department of Fire Protection Engineering, University of Maryland, College Park, MD 20742, USA
6 Department of Geography, Kingʼs College London, Strand, London, WC2R 2LS, UK
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Mélanie C. Rochoux; Bénédicte Cuenot; Sophie Ricci; Arnaud Trouvé; Blaise Delmotte; Sébastien Massart; Roberto Paoli; Ronan Paugam. Data assimilation applied to combustion. Comptes Rendus. Mécanique, Volume 341 (2013) no. 1-2, pp. 266-276. doi : 10.1016/j.crme.2012.10.011. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.10.011/

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