The combustion team at CERFACS develops fundamental models for reacting flows and applies them to real configurations. Fundamental research in combustion includes flame dynamics, chemistry, interaction with walls, heat transfer, radiation in reacting flows, multiphase reacting flows, flame / acoustic interactions... Most of these studies are performed using theory and Direct Numerical Simulation tools.
The application to real configurations is a direct extension of the results obtained from fundamental research where corresponding models are introduced in solvers usually developed at CERFACS (or in collaboration with CERFACS partners) for RANS (Reynolds Averaged Navier Stokes) and LES (Large Eddy Simulation) codes.
These two aspects (fundamental research versus applications in complex cases) must be balanced to fulfill the task of the team. The academic part, for example, is necessary to maintain the team expertise and attract high-level researchers from France but also from foreign universities. The contracts obtained in 2005 confirm that CERFACS can find funding for these fundamental aspects.
These studies are described in Section 2.1. LES of two-phase flows is the fastest growing activity in the team and is described in Section 2.2 while the unsteady combustion work (in gaseous flows) is presented in Section 2.3. Since 2003, CERFACS has started working again on RANS methods, mainly to develop new numerical methods, to use RANS codes for optimization or to couple RANS and LES tools: these studies are described in Section 2.4. Finally, Section 2.5 describes the software engineering tasks needed to make all large LES studies at CERFACS possible: optimisation, parallelization, visualization, etc. Many of these tasks are the product of intense collaborations with national computing centers such as CINES or IDRIS and with companies: in 2005, for example, AVBP, the LES code of CERFACS was ported successfully on BlueGene machines achieving speed up of the order of 4900 on 5000 processors on applications provided by PSA, Siemens and Turbomeca.
- Basic phenomena
- LES of two-phase reacting flows
- Turbulent dispersion of particles (E. Riber, O. Simonin,
B. Cuenot, T. Poinsot)
- LES of turbulent two-phase flames in aeronautical combustors (M. Boileau, S. Pascaud, B. Cuenot, T.Poinsot)
- Ignition of two-phase combustors (M. Boileau, S. Pascaud, B. Cuenot, T.Poinsot)
- Polydisperse sprays (J. Lavédrine, J.-B. Mossa,
B. Cuenot)
- LES of unsteady combustion
- LES models for combustion at CERFACS
- A small gas turbine burner (G. Lartigue, S. Roux, T. Poinsot)
- System identification of combustors (L. Selle , A. Giauque , A. Sengissen , K. Truffin , G. Staffelbach , Y. Sommerer , F. Nicoud, M. Brear, T. Poinsot )
- Acoustic / combustion numerical tools (A. Kaufmann , L. Benoit , C. Sensiau , F. Nicoud , T. Poinsot )
- Acoustic / combustion theoretical tools (C. Martin , A. Giauque , F. Nicoud , T. Poinsot , M. Brear )
- Ignition, quenching and flashback (Y. Sommerer , G. Staffelbach , M. Boileau , T. Poinsot )
- Multiburner computations (Y. Sommerer , M. Boileau , G. Staffelbach )
- Radiation, instability and pollutants (P. Schmitt , T. Poinsot )
- Ramjet (Y. Sommerer , L. Gicquel , A. Roux , T. Poinsot )
- LES in piston engines (L. Thobois , O. Vermorel , T. Poinsot )
- Advanced RANS tools for combustion
- Software engineering
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