Cellular and Heterogeneous Filtration Combustion Modes of Titanium \\in the Gravitational Force Field
P. M. Krishenik, S. V. Kostin
Institute of Structural Macrokinetics and Materials Sciences, Chernogolovka, 142432 Russia
Keywords: самораспространяющийся высокотемпературный синтез, ячеистые режимы, фингер, фильтрационное горение, устойчивость фронта, естественная конвекция, self-propagating high-temperature synthesis, cellular modes, finger, filtration combustion, front stability, natural convection
Abstract
The paper describes the formation of the combustion zone structure of a titanium powder layer in inclined rectangular air channels with natural gas filtration. It is shown that heterogeneous combustion near the critical conditions of its existence with limited supply of gaseous reagent in the reaction zone and under the effect of gravitational forces is accompanied by rearrangement of the plane homogeneous front into more complex wave structures: cellular, cross-cellular, and heterogeneous. The features of the process under study is the presence of gaseous impurities affecting the gas exchange in the reaction zone, the destabilization of the plane front, and the formation and propagation of heterogeneous and cellular wave structures.
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