Outgoing of a Heterogeneous Detonation Wave into a Channel with Linear Expansion. I. Propagation Modes
A. V. Fedorov, T. A. Khmel', S. A. Lavruk
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
Keywords: газовзвеси алюминия, детонация, расширяющийся канал, численное моделирование, gas suspension of aluminum particles, detonation, expanding channel, numerical simulation
Abstract
Propagation of a plane detonation wave in a stoichiometric mixture of a gas and aluminum particles in a plane channel with a linear expansion section is studied by methods of numerical simulation. The slope of the wall is varied from 15 to 60o. The basic modes of detonation propagation are analyzed: supercritical (without failure), critical (with partial failure and re-initiation), and subcritical (with complete separation of the shock front and combustion front and with detonation failure). The detonation configuration formed in the expanding section can be a cellular structure with large differences in cell sizes at large angles of expansion or a close-to-uniform structure at the wall angle of 15o.
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