Contribution au développement des outils de simulation numérique de la combustion supersonique

Abstract : This thesis, consisting of four chapters, concerns the improvement and development of models for the numerical simulation of the supersonic combustion. Chapter 1 describes the theoretical base of a computational code dedicated to the simulation of compressible reactive turbulent flows. Chapter 2 presents the improvements introduced in the k-epsilon turbulence model, namely the implementation of the Pope and Sarkar corrections and the validation of the model for compressible flows such as the plane mixing layer and round jet. A stabilizing limitation has been proposed for the Pope correction ensuring an accurate prediction of the jet spreading rate. A postprocessing of data from a direct simulation of a turbulent non-isothermal two-species mixing layer permitted to evaluate the ratio of the turbulent Prandtl and Schmidt numbers. Chapter 3 is devoted to the chemical kinetic models. A new method for the automatic reduction of chemical kinetic mechanisms has been elaborated and then applied to the development of reduced chemical models for the reactive mixtures CH4-H2-air and H2-vitiated air. A new empirical correlation for the autoignition delay time of the CH4-H2-air mixture has been proposed. The reduced mechanisms have been validated for homogeneous conditions and for a diffusive medium. Chapter 4 presents the methodology and results of a numerical study on a supersonic combustion chamber. The methodological aspects of this study are: the validation of numerical models, the choice of the boundary conditions, the mesh adaptation, and the comparison of two- and three-dimensional configurations.
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Theses
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https://tel.archives-ouvertes.fr/tel-00012170
Contributor : Dmitry Davidenko <>
Submitted on : Friday, April 21, 2006 - 6:11:04 PM
Last modification on : Thursday, January 17, 2019 - 4:24:03 PM
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  • HAL Id : tel-00012170, version 1

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Dmitry Davidenko. Contribution au développement des outils de simulation numérique de la combustion supersonique. Energie électrique. Université d'Orléans, 2005. Français. ⟨tel-00012170⟩

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