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MODELING AND NUMERICAL SIMULATION OF PHYSICOCHEMICAL PROCESSES OCCURRING IN THE TWO-PHASE FOAM LAYER OF BURNING RDX
Mechanical Engineering Department, The Pennsylvania State University, University Park, PA 16802
Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
The two-phase phenomena in the surface region of RDX could have significant effects on low-pressure burning rate and ignition behavior of RDX-based propellants. A model describing the physicochemical processes occurring in the two-phase foam layer of burning RDX was developed. An analysis based upon Lagrangian formulation, incorporating vaporization, heat transfer, and gas-phase chemical reactions was applied to a single bubble in the two-phase region. A multi-bubble analysis was also developed using a statistical treatment of families of single bubbles. The results of the single bubble simulation indicate pronounced vaporization of RDX in the foam layer, however, very little decomposition of RDX occurs in the gas bubbles even though the growth of the bubbles is significant, and the gas bubble temperature is largely governed by the surrounding liquid temperature.
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