Cerfacs Enter the world of high performance ...

HPC simulation of propulsion systems

The design of propulsion systems for aircraft, helicopters, rockets and satellites relies heavily on simulation, especially for the reacting flows taking place in combustion chambers.  These simulations are a very active field of applications for CERFACS.

Turbulent reacting flows are a fascinating field for fundamental research but also a domain where industry relies heavily on simulation and views it as a key to competitivity. These problems have been the focus of CERFACS research for more than twenty years through collaborations with industry (SAFRAN, AIRBUS, HONEYWELL) and thanks to resarch contracts by ANR and the European Union (including two ERC advanced grants (intecocis.inp-toulouse.fr  and cerfacs/fr/scirocco). These massive computations are performed on most existing platforms worldwide including  ASCI, INCITE or PRACE projects. They constitute excellent benchmarks for the HPC tools of CERFACS.

The LES  (Large Eddy Simulation) code of CERFACS is called AVBP and it is used daily at SAFRAN AIRCRAFT ENGINES and SAFRAN HELICOPTER ENGINES to design chambers. It is also used for LES in compressors and turbines and even for fully coupled simulations as shown below.

The AVBP LES tool code of CERFACS is also used for DNS (Direct Numerical Simulation).  AVBP is used for example, for rocket propulsion like in the picture below showing a DNS of the stabilisation of a H2/O2 flame in the Vulcain engine at the lips of the cryogenic injector.


The chemical schemes used in AVBP can describe complex chemical kinetics: they are obtained from a systematic reduction method of full schemes with hundreds of species and reactions using a code called ARCANE developed by the CERFACS team in collaboration with Cornell (Pr Pepiot).



CMIP6 debriefing workshop – May 2021: a stocktaking and foresight exercise that highlighted the major and long-term investment of the CNRM-CERFACS group in the latest climate model intercomparison international exercise

CERFACS |  9 June 2021

The participation of the CNRM-CERFACS group in the international coupled global climate model intercomparison exercise CMIP6 was debriefed on 10 and 11 May. Since the mid-1990s, the various phases of the Coupled Model Intercomparison Project (CMIP), supported by the World Climate Research Programme (WCRP), have enabled climate science to make significant progress, feeding into the IPCC reports, supporting regional climate modelling activities and downstream climate services. On the balance sheet, the participation of CNRM-CERFACS in the extremely demanding CMIP6 exercise has resulted in a large-scale, high-quality contribution in terms of climate simulations, thanks in particular to the strong commitment of researchers and engineers, the quality of support services and national and international collaborations. The activities mainly took place over the period 2013-2020. Initially, the production environment ("workflow") was set up and the coupled climate models were assembled by capitalising on the development of components (atmosphere, ocean and continental surfaces) carried out over the long term. The actual production of simulations was spread over 2018-2020. During the debriefing, perspectives (scientific objectives, model development, organisation) were drawn up with a view to a new participation of CNRM and CERFACS in CMIPRead more

CERFACS Combustion paper on rocket engines selected as Distinguished Paper at the last Int. Symp. on Comb. in Adelaide

CERFACS |  14 April 2021

The paper of C. Laurent 'Heat-release dynamics in a doubly- transcritical LO2/LCH4 cryogenic coaxial jet flame subjected to fuel inflow acoustic modulation’  has been selected at the Distinguished Paper in the Gas Turbine and Rocket Engine Combustion colloquium for the 38th International Symposium on Combustion. This paper authored by Laurent, Staffelbach, Nicoud  and  T. Poinsot  is available here:  describes the first LES of a forced doubly transcritical flame.Read more