Abstract:
This paper presents a numerical study of the combustion of an aluminum powder-air suspension in the presence of radiant heat transfer. The physical and mathematical formulation of the problem is based on the approaches of mechanics for two-phase reacting media. The solution method uses an arbitrary discontinuity decay algorithm. A parametric study of the apparent and normal burning rates of the aluminum powder-air suspension depending on the composition and degree of blackness of the gas suspension is implemented. According to the results obtained, the radiant heat losses can significantly affect the rate of flame propagation in the gas suspension of the fine aluminum powder. It is shown that the presence of the radiant heat transfer reduces the apparent flame propagation velocity through the gas suspension of the aluminum powder.
Keywords:combustion, air suspension of aluminum powder, flame propagation velocity, two-phase flows, numerical modeling.
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