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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Imprimir: 2150-766X
ISSN En Línea: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2016014230
pages 197-213

ACTIVE BORON DISPERSION AND IGNITION IN GEL DROPLET

Yair Solomon
Faculty of Aerospace Engineering, Technion − Israel Institute of Technology, Haifa 32000, Israel
Dan Grinstein
Technion, Israel Institute of Technology, Faculty of Aerospace Engineering, Haifa, Israel
Benveniste Natan
Faculty of Aerospace Engineering, Technion − Israel Institute of Technology, Haifa 320003, Israel

SINOPSIS

This study addresses the combustion behavior of micro-pyrotechnic clusters of boron suspended in kerosene-based gel fuels. Boron particles are combined in a low-oxidizer pyrotechnic mixture forming clusters of about 100 µm that are dispersed in the gel droplet. During the combustion of the gel droplet, the organic phase evaporates from the droplet surface, forming a porous layer of dry particles. The pyrotechnic clusters are designed to ignite in the "dry window" after the end of the kerosene evaporation and before boron oxidation bringing the boron particle to combustion temperature. The boron pyrotechnic mixture at the outer side is activated, dispersing hot boron particles while the droplet is still surrounded by the flame of the organic phase, which continues to evaporate beneath the layer. Operation in this timeframe can allow the pyrotechnic reaction to heat and disperse the boron particles, solving some of the problems that prevent the use of boron as an efficient fuel.

PALABRAS CLAVE: combustion, ignition, propulsion, gel, boron

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