Modeling of Hybrid Detonation in a Heterogeneous Gas Suspension of Aluminum Particles
A. A. Afanasenkov, T. A. Khmel
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: hybrid detonation, hydrogen-air mixture, aluminum particles, mathematical modeling, numerical calculations
Abstract
The results of numerical modeling of cellular detonation propagation in inhomogeneous gas suspensions of aluminum particles in a hydrogen-air mixture are presented. A physical and mathematical model of hybrid detonation is used, describing chemical reactions within the framework of the given kinetics. The model takes into account homogeneous and heterogeneous reactions with the formation of suboxides or solid aluminum oxide particles, as well as phase transitions (evaporation and decomposition of the oxide) in the reaction products. The model is consistent with known experimental data and the results of thermodynamic calculations of detonation parameters and mixture composition at equilibrium. Flows in channels with transverse gradients and discontinuities in particle concentrations are considered. Various patterns of cellular structures are obtained, allowing us to consider the spatial distribution of particles as a controlling factor in detonation processes.
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