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Wave regimes of dust combustion

Abstract

Experimental studies were performed to investigate the dependence of the laminar flame velocity in dust clouds of Al, Mg, Zr, Fe, and B particles on the physicochemical parameters (fuel concentration and composition, particle size distribution) and hydrodynamic conditions of the combustion process (semi-open tubes, free clouds of particle-air mixtures). Heat conduction was found to make a predominant contribution to the overall heat transfer in the combustion wave. The main causes of instability of laminar flames (acoustic disturbances, interfacial exchange, forced and natural convections), transient phenomena, and vibrational and turbulent combustion of dust were studied experimentally.

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Correspondence to V. G. Shevchuk.

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Original Russian Text © V.G. Shevchuk, E.N. Kondrats’ev, A.N. Zolotko, A.E. Sidorov, A.S. Oparin.

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Translated from Fizika Goreniya i Vzryva, Vol. 50, No. 1, pp. 90–96, January–February, 2014.

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Shevchuk, V.G., Kondrat’ev, E.N., Zolotko, A.N. et al. Wave regimes of dust combustion. Combust Explos Shock Waves 50, 80–86 (2014). https://doi.org/10.1134/S0010508214010109

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  • DOI: https://doi.org/10.1134/S0010508214010109

Keywords

  • dust
  • flame spread
  • laminar
  • turbulent
  • oscillatory regime
  • instability