Abstract
Experimental data on the interaction of detonation and shock waves with permeable barriers in cylindrical channels in hydrogen—air mixtures are presented. The method of soot tracks on semi-cylindrical smoked inserts made it possible to elucidate the mechanisms of initiation of the detonation downstream of the barriers. The possibility of initiating explosive processes, including detonation wave decay, is demonstrated. The numerical simulation of the detonation initiation behind the permeable barrier represented by a perforated screen is performed. Analysis of the experimental and calculation results demonstrated that in the near zone behind the barrier, detonation is initiated upon collision (focusing) of hemispherical shock waves emerging from separate holes. In the far zone, the initiation mechanism is similar to that observed on deflagration-to-detonation transition.
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Based on the materials of the XXV Conference “Modern Chemical Physics” (September 20–October 1, 2013, Tuapse).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1666–1676, August, 2014.
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Khomik, S.V., Medvedev, S.P., Veyssiere, B. et al. Initiation and suppression of explosive processes in hydrogen-containing mixtures by means of permeable barriers. Russ Chem Bull 63, 1666–1676 (2014). https://doi.org/10.1007/s11172-014-0652-1
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DOI: https://doi.org/10.1007/s11172-014-0652-1