This article is cited in 24 papers

Role of the structure of heterogeneous condensed mixtures in the formation of agglomerates

S. A. Rashkovskiy

Moscow Institute of Thermal Engineering, Moscow, 127276

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.

Keywords: agglomeration of aluminum, combustion of composite rocket propellants, propellant structure, ammonium perchlorate, binder.

UDC: 536.46

Received: 03.08.2001

 English version: Combustion, Explosion and Shock Waves, 2002, 38:4, 435–445

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