MODELISATION DU RISQUE PYROTECHNIQUE INDUIT PAR LA PRESENCE DE BULLES DANS LES LIQUIDES REACTIFS

摘要

We precise here the hot spot occurrence due to the presence of bubbles in a reactive liquid. The numerical simulations involve a modified Rayleigh model which takes into account the liquid compressibility and the bubbles population. Only 4 kinds of hot spots are possible, due to the combination of the following parameters: liquid sensitivity, gas reactivity, bubble origin (gas inclusion or cavitation), and size. Local ignition strongly depends on bubble size and on the gas polytropic constant value.