Simultaneous Measurement of Burning Velocity and Turbulence Intensity Ahead of the Flame Front during Aluminium Flame Propagation
Résumé
Numerical simulations of the flame propagation process are mandatory to predict the consequences of dust
explosions. One key parameter of these models is the burning velocity, i.e. the consumption rate of the
reactants by the flame front. This burning velocity depends on the characteristics of the mixture and on the
characteristics of the flow. Experiments are needed to estimate this burning velocity and to evaluate the
influence of the turbulence on this velocity. In this paper, an optical setup is implemented to perform TR-PIV
(Time-Resolved Particle Image Velocimetry) measurement during aluminium flame propagation in a vertical
tube. Because of the nature of the studied phenomena (luminous flame, propagating flame, dense particle
cloud...), performing PIV is challenging. With the analysis method detailed in this paper, the burning velocity
and the c orresponding turbulence level just ahead of the flame front are simultaneously determined. A
preliminary result is presented to illustrate this method. Following this method, the influence of turbulence on
burning velocity will be studied.
Domaines
Sciences de l'ingénieur [physics]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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