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).



The AVBP code from CERFACS at the heart of three PRACE projects from the 23rd call

CERFACS |  30 September 2021

Cerfacs is involved in three PRACE projects of the 23rd call for which hour allocation runs from 01/10/2021 to 30/09/2022. Researchers from ECL/LMFA UMR5509 (Ecole Centrale de Lyon) and IMFT (UMR 5502) laboratories have earned projects entirely based on the use of the LES solver developed by Cerfacs AVBP and involve the support of experts from the CFD and COOP teams underling the importance and effectiveness of collaborations between French labs and Cerfacs. Alexis Giauque from ECL/LMFA UMR5509 (Ecole Centrale de Lyon) has obtained not only one but two PRACE projects! The first project LESFAN (RA0101, 30 000 000 CPU hours on Irene/Rome TGCC) is based on the use of AVBP in the turbomachinery version to study the generation of noise by a fan of a real airplane engine. The second, PRACE-EDGES (RA0101, 40 000 000 CPU hours on Irene/Rome TGCC) focuses on LES modeling of dens gas in complex geometries. To do so, the LMFA Team has developed advanced thermodynamic closures in AVBP allowing the direct simulation of such flows. Laurent Selle from IMFT (UMR 5502) has received CPU hours for the GASTON project (RA0061, 30 000 000 CPU hours on Marenostrum BSC) which aims to study the structure of hydrogen flames in porous materials. For this, IMFT and Cerfacs will perform coupled simulations considering the reactive flow with AVBP as well as the conduction in the porous medium with AVTP which is known to play an central role in the flame stabilization process.Read more

watch the online contest ”my thesis in 180 sec” organized for Marie Curie actions

CERFACS |  24 September 2021

Next Thursday, Sept 30th the #FallingWallsLab #MSCA research presentation competition will take place, . This is a competition in which 15 researchers compete to deliver the best presentation of their research topic in the format "my thesis in 180 seconds" . Javier Crespo-Anadon, 3rd year PhD student in the CFD team is one of the 15 finalists and he will present this thesis topic: ignition in spinning combustion engines for a reduction in CO2 emissions! You can watch it online on the above website on Sept 30th at 3pm. I encourage you to go to the website and register!  You'll be able to listen to the other participants' pitches and vote for your favorite. Come and see for yourself what kind of research the EU funds!Read more