PhD defense - J. Lavédrine
Large Eddy simulations of the two-phase flow in models
of injectors of aeronautical engines
Delivered by INP Toulouse
Speciality: Fluid dynamics
June 2, 2008 - CERFACS
Abstract
Facing more stringent environmental regulations, aeronautical engines must reduce their fuel consumptions
and decrease polluting emissions. Reaching such purposes requires the optimization of the injection stage.
Large Eddy Simulation (LES) contributes to this subject since it allows a better understanding of unsteady
phenomena in the injector.
Nevertheless, applying LES to turbulent two-phase flows remains a challenge due to phenomena related to
the spray : atomization, dispersion and vaporization of droplets. In this thesis, such mechanisms are studied
in a progressive methodology.
In a first step, the LES approach is applied to an academic configuration with a polydisperse injector. This
study goes through a comparison between numerical results and measurements, and constitutes a validation
of the computational tool.
This tool is then used to investigate the two-phase flow in a new industrial injector design through a comparison with experiments. This investigation also identifies the performances and potential improvements of
such an injector. Finally, LES sensitivity to different injection strategies is assessed.
Jury
| J. Réveillon | Professor - University of Rouen | Referee |
| I. Gökalp | Senior researcher - ICARE, Orléans | Referee |
| G. Lavergne | Professor - ISAE, Toulouse | Member |
| S. Ducruix | Researcher - EM2C, Paris | Member |
| M. Rullaud | Doctor-engineer - SNECMA, Villaroche | Member |
| B. Cuenot | Senior researcher - CERFACS, Toulouse | Advisor |
