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Modélisation de l'auto-inflammation et de la combustion pour les moteurs Diesel

Abstract : The work concerns self-ignition and combustion modeling in Diesel engines. Special attention is given to turbulence induced effects. Only gas fuel injection is taken into account. Turbulent mixing is identified as one of the main parameters controlling self-ignition in Diesel engines. However, turbulence effects are often neglected by models currently used in engine calculation codes. A new model based on results obtained by direct numerical simulation (DNS) is proposed. It includes turbulence effects by means of the scalar dissipation rate and presumed pdf of the mixture fraction and a chemical reaction progress variable. The model is validated through several steps. First, its results are compared to DNS in simple mixing and self-ignition cases. Then, its averaged version is integrated into the KIVA2-MB calculation code, where its behavior is tested in a one dimensional version and compared to other formulations. Finally, the model is validated with comparisons to experimental results of methane injection into a high pressure combustion chamber filled with hot air. The combustion chamber allows large optical access and therefore, optical diagnostics can be made.
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Contributor : Antonio Pires da Cruz <>
Submitted on : Wednesday, December 9, 2009 - 11:15:47 AM
Last modification on : Wednesday, December 9, 2020 - 3:13:14 PM
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  • HAL Id : tel-00440040, version 1


Antonio Pires da Cruz. Modélisation de l'auto-inflammation et de la combustion pour les moteurs Diesel. Energie électrique. Université Pierre et Marie Curie - Paris VI, 1997. Français. ⟨tel-00440040⟩



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