| Numéro |
J. Phys. IV France
Volume 12, Numéro 7, August 2002
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|---|---|---|
| Page(s) | 223 - 230 | |
| DOI | https://doi.org/10.1051/jp4:20020287 | |
J. Phys. IV France 12 (2002) Pr7-223
DOI: 10.1051/jp4:20020287
Prediction of ignition hazard during turbulent gas mixing by using a Lagrangian approach
A. Gourara1, F. Roger1, J.M. Most1, H.Y. Wang1, V. Naudet2, F. Illy2 and O. Louédin21 Laboratoire de Combustion et de Détonique, UPR 9028 du CNRS, ENSMA, BP. 109, 86960 Futuroscope cedex, France
2 Air Liquide, Direction Recherche et Développement, Centre de Recherche Claude Delorme, 1 chemin de la Porte des Loges, BP. 126, Les Loges en Josas, 78354 Jouy-en-Josas cedex, France
Abstract
The study presented in this paper exposes a general numerical method to assess both ignition and
autoignition hazards in industrial flammable gas mixers. It is based on a previous Large Eddy Simulation of
turbulent mixing that provides the unsteady fields of velocity, pressure, temperature and chemical composition, and
a Lagrangian tracking elements trajectory file. A statistical post-processing computation is performed to estimate the
probability of ignition of the mixture by comparing the fuel molar fraction to flammability limits and the flow time
scales to chemical delays provided by the CHEMKIN code. This method appears powerful to characterize the safety
of industrial mixers.
© EDP Sciences 2002