Direct Determination of Burning Velocity during Aluminium Flame Propagation
Résumé
Numerical simulations are needed to model accurately the consequences of dust explosions. One key
parameter for modelling the flame propagation is the burning velocity (ie the consumption rate of the reactants
by the flame front). Most of the methods used for experimentally determining this burning velocity are based
on rough assumptions. In this paper, the determination of burning velocity during aluminium flame propagation
is directly determined by the measurement of two velocities: the flame propagation velocity (ie flame front
velocity in the laboratory referential) and the unburned flow velocity. Data of unburned flow velocity are
obtained by Pitot tube and PIV (Particle Image Velocimetry) and are fairly close. An increase of burning
velocity during aluminium flame propagation in the tube is observed. This increase is probably due to an
increase of the turbulent intensity in front of the flame front during the propagation.
Domaines
Sciences de l'ingénieur [physics]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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