Abstract
We present the results from an experimental study into the dynamics involved in the formation and the unique features of ignition in shock gas suspensions of coal dust with a dispersion of<40 μm and a volatile content of 9, 26, and 55%. We have determined the ignition delays τig for coal dusts in air and in pure oxygen for a range of Mach numbers from 2.6 to 4.0 in an incident shock wave. We have established that the quantity τig as well as the nature of the function τig(1/T) are significantly affected by the kinetics of the volatile yield, in addition to the kinetics of volatile ignition. We have derived an approximation expression for τig as a function of the content of volatiles, the temperature of the medium, and the partial pressure of the oxygen.
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Novosibirsk. Translated from Fizika Goreniya i Vzryva, No. 2, pp. 101–111, March–April, 1991.
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Boiko, V.M., Papyrin, A.N. & Poplavskii, S.V. Effect of volatiles on ignition delay in coal dust gas suspensions within shock waves. Combust Explos Shock Waves 27, 223–231 (1991). https://doi.org/10.1007/BF00789405
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DOI: https://doi.org/10.1007/BF00789405