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Parametric study of double cellular detonation structure

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Abstract

A parametric numerical study is performed of a detonation cellular structure in a model gaseous explosive mixture whose decomposition occurs in two successive exothermic reaction steps with markedly different characteristic times. Kinetic and energetic parameters of both reactions are varied in a wide range in the case of one-dimensional steady and two-dimensional (2D) quasi-steady self-supported detonations. The range of governing parameters of both exothermic steps is defined where a “marked” double cellular structure exists. It is shown that the two-level cellular structure is completely governed by the kinetic parameters and the local overdrive ratio of the detonation front propagating inside large cells. Furthermore, since it is quite cumbersome to use detailed chemical kinetics in unsteady 2D case, the proposed work should help to identify the mixtures and the domain of their equivalence ratio where double detonation structure could be observed.

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Authors and Affiliations

  1. Departement Fluides, Thermique, Combustion, Institut PPRIME UPR 3346 CNRS, E.N.S.M.A., 1 Avenue Clément Ader, BP 40109, 86961, Futuroscope-Chasseneuil cedex, France

    B. Khasainov, F. Virot, H.-N. Presles & D. Desbordes

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  1. B. Khasainov
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  2. F. Virot
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  3. H.-N. Presles
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  4. D. Desbordes
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Correspondence to B. Khasainov.

Additional information

Communicated by L. Bauwens and E. Timofeev.

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

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Khasainov, B., Virot, F., Presles, HN. et al. Parametric study of double cellular detonation structure. Shock Waves 23, 213–220 (2013). https://doi.org/10.1007/s00193-012-0419-2

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  • DOI: https://doi.org/10.1007/s00193-012-0419-2

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