J. Phys. IV France 12 (2002) Pr7-265
Influence of mixture composition on the oscillatory behaviour of flames propagating from the closed end toward the open end of smooth horizontal tubesB. Veyssière1, M. Arrigoni1 and S. Kerampran2
1 Laboratoire de Combustion et de Détonique, UPR 9028 du CNRS, Université de Poitiers, ENSMA, Téléport 2, 1 avenue Clément Ader, BP. 40109, 86961 Futuroscope-Chasseneuil cedex, France
2 Département de Mécanique des Fluides, ENSIETA, Brest, France
Experimental study of the oscillatory behaviour of flames propagating from the closed end toward the open end of smooth horizontal tubes show that this behaviour is governed by the initial value of the laminar flame speed V ( , where is the expansion ratio of gases and S the laminar burning velocity). Experiments were performed in three stoichiometric mixtures of propane, ethylene or acetylene with oxygen diluted with nitrogen in different proportions so that the initial value of V is of the same order of magnitude for the different mixtures (~3 m/s). Flame is observed to have an oscillatory behaviour with similar characteristics during its propagation in the three mixtures.
© EDP Sciences 2002