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Role of the Structure of Heterogeneous Condensed Mixtures in the Formation of Agglomerates

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Combustion, Explosion and Shock Waves Aims and scope

Abstract

Mathematical simulation of the structure of metallized heterogeneous condensed mixtures is performed. Evolution of a system of aluminum particles is studied in the case a heat wave passes over the mixture. It is shown that rapid heating of a heterogeneous condensed mixture forms a system of “clusters” of contacting aluminum particles, which may sinter to form a porous system that melts and disperses into individual droplets with further heating under the action of surface-tension forces. After coalescence, these droplets form agglomerates. The structure of “clusters” of contacting particles is studied, and the mean-mass size of metal particles is determined as a function of dispersion of the components and their concentration in the heterogeneous condensed mixture. It is shown that contacting aluminum particles in the heterogeneous condensed mixture form fractal-like structures, which may play a significant role in the course of combustion of the mixture. Key words: agglomeration of aluminum, combustion of composite rocket propellants, propellant structure, ammonium perchlorate, binder.

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  1. Moscow Institute of Thermal Engineering, Moscow, 127276

    S. A. Rashkovskii

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Rashkovskii, S.A. Role of the Structure of Heterogeneous Condensed Mixtures in the Formation of Agglomerates. Combustion, Explosion, and Shock Waves 38, 435–445 (2002). https://doi.org/10.1023/A:1016211215981

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