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On some conditions for detonation initiation downstream of a perforated plate

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Abstract

An experimental study is presented of the influence of detonation wave parameters and detonation product composition upstream of a perforated plate on the onset of detonation downstream. Experiments were performed in detonation tube 106 mm in diameter, separated into two sections by a perforated plate combined with a diaphragm. The tube was equipped with pressure sensors and a semi-cylindrical smoked foil. Hydrogen–air mixtures with different hydrogen concentrations were used upstream and downstream of the perforated plate. It is shown for mixtures containing 25 and 34 % of hydrogen in air that the onset of detonation downstream depends on detonation parameters upstream of the perforated plate. An increase in the initial pressure upstream of the plate leads to detonation initiation immediately downstream. The variation of mixture composition upstream of a perforated plate does not affect on detonation initiation downstream under the present experimental conditions.

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Acknowledgments

This work was supported by CNRS (France).

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Correspondence to S. V. Khomik.

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Communicated by S. Dorofeev.

This paper is based on work that was presented at the 23rd International Colloquium on the Dynamics of Explosions and Reactive Systems, Irvine, CA, USA, 24–29 July 2011.

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Khomik, S.V., Veyssiere, B., Medvedev, S.P. et al. On some conditions for detonation initiation downstream of a perforated plate. Shock Waves 23, 207–211 (2013). https://doi.org/10.1007/s00193-012-0409-4

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  • DOI: https://doi.org/10.1007/s00193-012-0409-4

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