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Specifics of the combustion of aluminum-water mixtures

  • Combustion, Explosion, and Shock Waves
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Abstract

Experimental studies of the combustion of mixtures of micron-sized flaky aluminum powder with unthickened water in different conditions at atmospheric and high pressure in nitrogen and argon are performed. The density and composition of the mixture are varied. The regularities of the combustion have been established. A filtration wave of hot hydrogen ahead of the combustion front in samples with high porosity has been revealed. For the combustion under a nitrogen atmosphere, the pressure exponent in the burning rate law is close to 0.47 in a wide range of pressures. For the combustion under an argon atmosphere at pressures above 50 atm, the pressure exponent becomes zero or negative. Aluminum powder is demonstrated to be able to burn under conditions of a separated charge, where the fuel (aluminum) and oxidizer (water) are separated by a thin partition or brought in direct contact. The fast convective burning of aluminum-water mixtures in a semiclosed volume is discovered.

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Authors and Affiliations

  1. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia

    V. M. Shmelev & S. V. Finyakov

Authors
  1. V. M. Shmelev
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  2. S. V. Finyakov
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Correspondence to V. M. Shmelev.

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Original Russian Text © V.M. Shmelev, S.V. Finyakov, 2013, published in Khimicheskaya Fizika, 2013, Vol. 32, No. 7, pp. 53–64.

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Shmelev, V.M., Finyakov, S.V. Specifics of the combustion of aluminum-water mixtures. Russ. J. Phys. Chem. B 7, 437–447 (2013). https://doi.org/10.1134/S1990793113040106

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  • DOI: https://doi.org/10.1134/S1990793113040106

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