Abstract
A standing wave regime of filtration gas combustion is studied numerically and experimentally. A discrete two-dimensional model of gas combustion in porous media is proposed. In this model the porous media is represented as a set of randomly placed solid grains which are connected through the artificial solid plate. The combustion wave propagation is simulated in the frame of thermal-diffusion approximation for the prescribed flow field which is computed preliminary using Lagrangian particle method. Dependencies of combustion wave velocity on the filtration velocity for different equivalence ratios are obtained. The model predicts the existence of the flame anchoring phenomena when the combustion wave is stabilized spatially for a range of filtration velocities. The experimental setup which is suitable for estimation of combustion wave velocity is presented. Dependencies of combustion wave velocity on filtration velocity are obtained experimentally. Our numerical and experimental results are in qualitative agreement.
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