This article is cited in 13 papers

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 of the Russian Academy of Sciences, Novosibirsk, 630090, Russia

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 60$^\circ$. 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 15$^\circ$.

Keywords: gas suspension of aluminum particles, detonation, expanding channel, numerical simulation.

UDC: 532.529+541.126

Received: 01.02.2017

DOI: 10.15372/FGV20170513

 English version: Combustion, Explosion and Shock Waves, 2017, 53:5, 585–595

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