627 Hits in 7.0 sec

Large Eddy Simulation of self excited azimuthal modes in annular combustors

G. Staffelbach, L.Y.M. Gicquel, G. Boudier, T. Poinsot
2009 Proceedings of the Combustion Institute  
This study presents a massively parallel Large Eddy Simulation (LES) of a full helicopter combustion chamber in which a self-excited azimuthal mode develops naturally.  ...  due to the annular shape of their chambers.  ...  Acknowledgment The authors wish to acknowledge the help of Turbomeca (Dr C. Berat and Dr V. Moureau).  ... 
doi:10.1016/j.proci.2008.05.033 fatcat:q4r43kyamfcrhipzvi46xumsz4

Towards the Large-Eddy Simulation of a full engine: Integration of a 360 azimuthal degrees fan, compressor and combustion chamber. Part I: Methodology and initialisation

Carlos Pérez Arroyo, Jérôme Dombard, Florent Duchaine, Laurent Gicquel, Benjamin Martin, Nicolas Odier, Gabriel Staffelbach
2021 Journal of the Global Power and Propulsion Society  
In contrast to the current state-of-the-art, this work presents a 360 azimuthal degrees large-eddy simulation with over 2100 million cells of the DGEN-380 demonstrator engine enclosing a fully integrated  ...  fan, compressor and annular combustion chamber at take-off conditions as a first step towards a high-fidelity simulation of the full engine.  ...  Paillassa from Safran Helicopter Engines for their technical support on the generation of the reduced-count geometry of the compressor and for performing its respective RANS simulations.  ... 
doi:10.33737/jgpps/133115 fatcat:5xgn6y6dd5ewxf2pdy4r7mkp5i

Using LES to Study Reacting Flows and Instabilities in Annular Combustion Chambers

Pierre Wolf, Ramesh Balakrishnan, Gabriel Staffelbach, Laurent Y. M. Gicquel, Thierry Poinsot
2011 Flow Turbulence and Combustion  
Since one of the most limiting factors in performing Large Eddy Simulation (LES) of real combustors is estimating the adequate grid, the effects of mesh resolution are investigated by computing full annular  ...  To predict these modes, one must compute the full combustion chamber, which remained out of reach until very recently and the development of massively parallel computers.  ...  simulations.  ... 
doi:10.1007/s10494-011-9367-7 fatcat:guwrwptduncazdms7sjl75ztaq

Simulation Tools for Powertrain Design and Control

António Pires da Cruz, Christian Angelberger, Adlène Benkenida
2009 Oil & Gas Science and Technology  
Indeed, the use of massively parallel machines and new processors opens the way for significant developments.  ...  The understanding of turbulent flows using Large Eddy Simulation (LES) is a current theme to which significant resources are dedicated.  ... 
doi:10.2516/ogst/2009032 fatcat:r3nkn7eyvnenfcogedmslpd3ti

Combining in-situ and in-transit processing to enable extreme-scale scientific analysis

Janine C. Bennett, Hasan Abbasi, Peer-Timo Bremer, Ray Grout, Attila Gyulassy, Tong Jin, Scott Klasky, Hemanth Kolla, Manish Parashar, Valerio Pascucci, Philippe Pebay, David Thompson (+3 others)
2012 2012 International Conference for High Performance Computing, Networking, Storage and Analysis  
We demonstrate the efficiency of our lightweight, flexible framework by deploying it on the Jaguar XK6 to analyze data generated by S3D, a massively parallel turbulent combustion code.  ...  In this paper we explore the design and implementation of three common analysis techniques typically performed on large-scale scientific simulations: topological analysis, descriptive statistics, and visualization  ...  We demonstrate the efficiency of our lightweight, flexible framework by deploying it on the Jaguar XK6 to analyze data generated by S3D, a massively parallel turbulent combustion code.  ... 
doi:10.1109/sc.2012.31 dblp:conf/sc/BennettABGGJKKPPPTYZC12 fatcat:f3wyhi5khzgmfphpdpx7skvyoq

Compressible effects on a temporal direct numerical simulation

R. Sauvage, A. Kourta, André Giovannini, Georges-Henri Cottet, Yves Gagnon, Ahmed F., Eckart Meiburg
1999 ESAIM: Proceedings and Surveys  
Direct numerical simulation of a temporal compressible mixing layer has been performed through the mixing layer transition at convective Mach number 0.4 with massively parallel computer.  ...  Numerical simulation initialized by the most amplified linear instability waves is then presented. 192 3 mesh size is used to describe full scales.  ...  Current simulations have been performed on massively parallel computer. This computing way allows to increase spatial resolution and to simulate higher Reynolds number flows.  ... 
doi:10.1051/proc:1999035 fatcat:ch23de52trbfxn6pf326gyusju

Large Eddy Simulations of gaseous flames in gas turbine combustion chambers

L.Y.M. Gicquel, G. Staffelbach, T. Poinsot
2012 Progress in Energy and Combustion Science  
Recent developments in numerical schemes, turbulent combustion models and the regular increase of computing power allow Large Eddy Simulation (LES) to be applied to real industrial burners.  ...  Limiting cases and range of validity of the models are specifically recalled before a discussion on the numerical breakthrough which have allowed LES to be applied to these complex cases.  ...  field of research a very stimulating environment for students, young researchers and engineers.  ... 
doi:10.1016/j.pecs.2012.04.004 fatcat:63a6jasw75e6rhpktzobkfybiq

Conjugate heat transfer with Large Eddy Simulation for gas turbine components

Florent Duchaine, Simon Mendez, Franck Nicoud, Alban Corpron, Vincent Moureau, Thierry Poinsot
2009 Comptes rendus. Mecanique  
The numerical tool is based on a reactive LES (Large Eddy Simulations) code and a solid conduction solver that can exchange data via a supervisor.  ...  During this work, a fully parallel environnement for conjugate heat transfer has been developed and applied to two configurations of interest for the design of combustion devices.  ...  parallel machines where the codes must be not only coupled but synchronized to exploit the power of the machines.  ... 
doi:10.1016/j.crme.2009.06.005 fatcat:4xduzmripbbzdbfmdp33obdqwa

Large Scale Parallel Solution of Incompressible Flow Problems Using Uintah and Hypre

J. Schmidt, M. Berzins, J. Thornock, T. Saad, J. Sutherland
2013 2013 13th IEEE/ACM International Symposium on Cluster, Cloud, and Grid Computing  
machine.  ...  The Uintah Software framework was developed to provide an environment for solving fluid-structure interaction problems on structured adaptive grids on large-scale, long-running, data-intensive problems  ...  We would like to thank all those previously involved with Uintah and TACC, NICS and Oak Ridge for access to large numbers of cores.  ... 
doi:10.1109/ccgrid.2013.10 dblp:conf/ccgrid/SchmidtBTSS13 fatcat:v3b5ryn5zbaqvhjz7s72iwqcpi

Direct Numerical Simulations for Combustion Science: Past, Present, and Future [chapter]

Hong G. Im
2017 Energy, Environment, and Sustainability  
Acknowledgments The work presented in this study was sponsored by King Abdullah University of Science and Technology (KAUST).  ...  transfer from large scale turbulent eddies.  ...  The ability to perform a large number of simulations comes with the associated difficulties in choosing the most effective way to conduct the computational parametric studies, including the massive data  ... 
doi:10.1007/978-981-10-7410-3_4 fatcat:sugj6y2dt5dlxoppujtujg6x5y

Aerodynamics, computers and the environment

P. G. Tucker, J. R. DeBonis
2014 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
The use of direct numerical simulation to refine NDS approaches such as large eddy simulation is discussed.  ...  In addition, new algorithms emerging that could help with massively parallel simulations are covered.  ... 
doi:10.1098/rsta.2013.0331 pmid:25024420 pmcid:PMC4095904 fatcat:sl2jsxub4jb35evgseq2toiqqq

Large eddy simulations of turbulent reacting flows in real burners: the status and challenges

L Y M Gicquel, G Staffelbach, B Cuenot, T Poinsot
2008 Journal of Physics, Conference Series  
However, and because of the advent of Highly Parallel Computers (HPC) providing teraflop capabilities, the fully unsteady, temporally and spatially dependent approach that is Large Eddy Simulations (LES  ...  From a purely scientific point of view, the treatment of combustion and turbulence yields additional difficulties.  ...  Acknowledgments Authors wishing to acknowledge the contributions from CERFACS students and colleagues, the SciDAC organisation for this invited contribution as well as all the HPC contributors without whom most of  ... 
doi:10.1088/1742-6596/125/1/012029 fatcat:sxk3w4eihza5liflolt7y2pzmy

Formal Correctness Methods at the Million CPU Scale

Ganesh Gopalakrishnan
2013 Electronic Proceedings in Theoretical Computer Science  
At present, Uintah is able to make full use of present-day massively parallel machines as the result of three phases of development over the past dozen years.  ...  The past, present and future scalability of the Uintah Software framework is considered with the intention of describing a successful approach to large scale parallelism and also considering how this approach  ...  The hypre software library [2] is designed for the iterative solution of linear systems of equations on large parallel machines.  ... 
doi:10.4204/eptcs.107.1 fatcat:6cso6bitrvahxm5her22rez6cy

Large-Eddy Simulations of Turbulent Flows, from Desktop to Supercomputer [chapter]

Ugo Piomelli, Alberto Scotti, Elias Balaras
2001 Lecture Notes in Computer Science  
In this paper, a general introduction to the large-eddy simulation (LES) technique will be given.  ...  A palette of applications will then be presented, chosen on the basis both of their scientific and technological importance, and to highlight the application of LES on a range of machines, with widely  ...  Two stability limits apply to large-eddy simulations.  ... 
doi:10.1007/3-540-44942-6_45 fatcat:ui6ixfts6jcljhe6nqyizaujjm

Computational combustion

Charles K. Westbrook, Yasuhiro Mizobuchi, Thierry J. Poinsot, Phillip J. Smith, Jürgen Warnatz
2005 Proceedings of the Combustion Institute  
Finally, the current state of combustion modeling is illustrated by descriptions of a very large jet lifted 3D turbulent hydrogen flame with direct numerical simulation and 3D large eddy simulations of  ...  Progress in the field of computational combustion over the past 50 years is reviewed.  ...  In Japan, Tanahashi As an example of the frontier in massively parallel computational combustion, a simulation of a hydrogen jet lifted flame by Mizobuchi et al.  ... 
doi:10.1016/j.proci.2004.08.275 fatcat:pbsk2svvlfcdbm2lw5nbky3amu
« Previous Showing results 1 — 15 out of 627 results