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PhD defense : Francis Shum-Kivan (CFD)

  Jeudi 15 juin 2017 à 14h00

  Thèses Cerfacs       le jeudi 15 juin 2017, à 14h, en salle de conférences du Cerfacs    

LARGE EDDY SIMULATION OF SPRAY FLAMES AND MODELLING OF NON-PREMIXED COMBUSTION

Abstract:

The combustion of hydrocarbons still represents a major part of the worldwide production of energy, especially in the aeronautical industry. Most industrial burners are fed with liquid fuel that is directly injected in the combustion chamber, generating a strong interaction between the spray, the turbulent flow and the flame. In order to provide a better understanding of turbulent spray flame complex structures, a numerical study has been performed on the two-phase flow burner KIAI which has been experimentally fully characterized. Numerical simulations consist of Large Eddy Simulation coupled to Discrete Particle Simulation for the dispersed phase (LES-DPS). A detailed analysis of the flame structure shows that non-premixed combustion plays an important role in this type of spray flame. This motivates, in a second step of the present work, the development of a new approach to model turbulent diffusion flames. The model is based on the response to the mesh, strain rate and wrinkling. The global flame heat release is analyzed through configurations of increasing complexity and the capacity of the model to describe it is evaluated.

Key words:

LES-DPS, spray flames, non-premixed combustion

 

Members of the Jury:

Denis VEYNANTE                     Research Director, CNRS-EM2C               Referee

Stéphane JAY                              Research Engineer, IFPEN                      Referee

Bruno RENOU                            Professor, CORIA                                      Member

Fabien HALTER                        Professor, ICARE,                                       Member

Bénédicte CUENOT                 Senior Researcher, CERFACS                     Advisor

Eléonore RIBER                        Senior Researcher, CERFACS                   Co-Advisor

L'AGENDA

Lundi

24

Juin

2024

Assimilation de données

Du lundi 24 juin 2024 au jeudi 27 juin 2024

  Formation    

Lundi

07

Octobre

2024

Apprentissage machine pour la science des données

Du lundi 7 octobre 2024 au jeudi 10 octobre 2024

  Formation    

Lundi

14

Octobre

2024

Bases théoriques pour la compréhension et l’analyse de Simulations aux Grandes Echelles compressibles

Du lundi 14 octobre 2024 au mercredi 16 octobre 2024

  Formation       Cerfacs, Toulouse, France    

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