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Received July 30, 2001
Accepted October 29, 2001
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Observations on Combustion Front Propagation in Self-Propagating High-Temperature Synthesis Process Producing Refractory Ceramics
Department of Chemical Engineering, Kyunghee University, 1 Seochun-ri, Kiheung-eup, Yongin 449-701, Korea 1Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Kwangjin-ku, Seoul 143-701, Korea
sanghkim@konkuk.ac.kr
Korean Journal of Chemical Engineering, May 2002, 19(3), 400-405(6), 10.1007/BF02697146
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Abstract
High-temperature refractory ceramics can be produced in the combustion regime by using self-propagating, high-temperature synthesis (SHS) processes. The numerical simulation of the SHS process in a simplified diffusionreaction system is investigated. The SHS process is simplified by the one- and two-dimensional pseudo-homogeneous environment. The stiff equations of the SHS process are solved by using finite difference methods on twodimensional_x000D_
adaptive meshes. Travelling waves with constant patterns are observed for adiabatic and nonadiabatic systems. For higher values of heat of reaction and activation energy, the combustion front starts to oscillate. Single and complex oscillating waves are detected. In oscillating combustion fronts, the temperature can overshoot the adiabatic temperature to result in the complete conversion of solid reactants. In two dimensional systems, travelling, fingering,_x000D_
and rotating waves are detected in the combustion synthesis process.
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References
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