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Conditions of self-ignition upon pulsed high-pressure injection of combustible gases into a bounded space

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Combustion, Explosion and Shock Waves Aims and scope

Abstract

The temperature of a fuel-air mixture in the vicinity of a contact discontinuity formed in the process of exhaustion of a combustible gas (hydrogen, methane, and propane) into air after the shock-tube membrane breakdown is quantitatively evaluated. It is shown that conditions necessary for self-ignition of such a mixture are reached only when the shock wave reflected from the tube bottom passes through the mixture. An increase in the initial pressure of air in the tube exerts a dramatic adverse effect on the probability of self-ignition of the mixture. In addition, the calculation shows that favorable conditions for self-ignition of a methane- and propane-air mixtures, even after the secondary compression of the mixture behind the reflected-wave front, are observed only for a comparatively high pressure of the combustible gas prior to its exhaustion into the tube and simultaneously for a low initial pressure of air in the tube. The calculation results are in good agreement with available experimental data for a hydrogen-air mixture.

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Authors and Affiliations

  1. Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, 630090, Novosibirsk

    V. K. Baev, A. A. Buzukov & V. V. Shumskii

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  1. V. K. Baev
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  2. A. A. Buzukov
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  3. V. V. Shumskii
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Translated fromFizika Goreniya i Vzryva, Vol. 36, No. 3, pp. 3–10, May–June, 2000.

This work was supported by the Russian Foundation for Fundamental Research (Grant No. 97-01-00506).

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Baev, V.K., Buzukov, A.A. & Shumskii, V.V. Conditions of self-ignition upon pulsed high-pressure injection of combustible gases into a bounded space. Combust Explos Shock Waves 36, 283–290 (2000). https://doi.org/10.1007/BF02699378

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  • DOI: https://doi.org/10.1007/BF02699378

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