Numerical Simulation of Heterogeneous Combustion of Axisymmetric Porous Objects under Forced Filtration and Natural Convection
K. G. Borovik1,2, N. A. Lutsenko1,2
1Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690041 Russia
2Far Eastern Federal University, Vladivostok, 690922 Russia
Keywords: porous media, gas filtration, heterogeneous combustion, numerical simulation, finite difference method
Abstract
A numerical model for heterogeneous combustion of axisymmetric porous objects has been proposed that allows one to simulate processes under both forced filtration natural convection. The influence of the location of the ignition zone on combustion in a cylindrical porous reactor has been investigated. It has been shown that under forced filtering, the process similar to plane case: the combustion wave moves upward and sideways from the ignition source, completely burning out the solid fuel, while the gas tends to bypass hot zones and flow through colder regions. Under natural convection conditions, as in the plane case, the oxidizer flow into the reaction zone is significantly affected by vortex gas flows that arise in the vicinity of the combustion center at the initial time. In this case, the direction propagation of combustion waves in the axisymmetric case can significantly differ from thatin the plane case.
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