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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.142 SNIP: 0.16 CiteScore™: 0.29

ISSN 印刷: 2150-766X
ISSN オンライン: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v7.i6.10
pages 453-474

MULTIPHASE SIMULATION OF SINGLE ALUMINUM PARTICLE EVAPORATION AND COMBUSTION IN CONVECTIVE ENVIRONMENTS

Ryan W. Houim
The Pennsylvania State University, University Park, PA 16802, USA
Kenneth K. Kuo
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802, USA

要約

Aluminum particles of different shapes have broad applications as a solid fuel ingredient in propellants and explosives. The objective of this paper is to develop a comprehensive model of aluminum particle ignition and combustion processes. A new model of aluminum droplet combustion was formulated using the volume of fluid (VOF) multiphase approach. The VOF approach can naturally handle phase interactions such as surface tension, evaporation, heterogeneous reactions, oxide condensation, and oxide recession. Similar to experimentally observed phenomena in a parallel study, calculated results demonstrated the importance of particle spin rates on the morphology of the molten Al flake. At high spin rates, a disk shaped aluminum flake can break apart into multiple fragments as found in recovered samples. This phenomenon is important in the combustion of energetic particles since the exposed surface area can change by the dynamic interaction between the surrounding fluid with the particle. Numerical results obtained from this generalized multiphase combustion model have also demonstrated the flame development around the Al particle. The time evolution of molten aluminium particles into various shapes was also demonstrated as a strong function of their initial geometric configurations.

参考

  1. Tanguy, S. and Berlemont, A., Application of a Level Set Method for Simulation of Droplet Collisions.


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