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Modélisation hybride de la chimie pour la simulation numérique de la combustion

Abstract : Even if significant progress is being made to improve the power of high-performance computers, the numerical simulation of reactive flows involving complex chemistry is still a challenging task. The objective of this work is the development of the Hybrid Transported-Tabulated Chemistry method (HTTC), designed for the DNS/LES simulations of flames with detailed kinetic mechanisms, with an acceptable cost. This novel approach combines the transport of the main species in the flow with the tabulation of the radical species. It has been implemented in a DNS/LES code and validated on 1D methane and kerosene flames. The cost of the simulations has been considerably decreased, compared to classic detailed chemistry solvers. Then, simulations of methane edge flames, featuring large gradients of mixture fraction, have been performed with HTTC. In particular, the impact of the methods used to extend the chemical tables and to compute the control variables have been analyzed in details. A very good agreement has been found by comparison with detailed chemistry.
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https://tel.archives-ouvertes.fr/tel-01764917
Contributor : Abes Star :  Contact
Submitted on : Thursday, April 12, 2018 - 2:30:07 PM
Last modification on : Wednesday, February 26, 2020 - 12:06:37 PM

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  • HAL Id : tel-01764917, version 1

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Bastien Duboc. Modélisation hybride de la chimie pour la simulation numérique de la combustion. Mécanique des fluides [physics.class-ph]. Normandie Université, 2017. Français. ⟨NNT : 2017NORMIR23⟩. ⟨tel-01764917⟩

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