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Cellular detonation diffraction in gas–particle mixtures

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Abstract

Diffraction of cellular heterogeneous detonation out of a channel into open half-space in a mixture of aluminum particles and oxygen is investigated numerically. The flow is found to be very similar to gas detonation diffraction. The detonation weakening behind the step results in combustion front deceleration and decoupling from the leading shock wave. Subsequent re-initiation takes place in a transverse wave. New transverse waves are generated along the expanding front. The computations that were performed show that the critical number of cells is several times less than that for gases. This is confirmed by theoretical estimates based upon the Mitrofanov–Soloukhin approach.

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Authors and Affiliations

  1. Khristianovich Institute of Theoretical and Applied Mechanics, SB RAS, Institutskaya 4/1, 630090, Novosibirsk, Russia

    A. V. Fedorov, T. A. Khmel & Y. V. Kratova

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  1. A. V. Fedorov
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  2. T. A. Khmel
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  3. Y. V. Kratova
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Correspondence to T. A. Khmel.

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Communicated by L. Bauwens.

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Fedorov, A.V., Khmel, T.A. & Kratova, Y.V. Cellular detonation diffraction in gas–particle mixtures. Shock Waves 20, 509–519 (2010). https://doi.org/10.1007/s00193-010-0290-y

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  • DOI: https://doi.org/10.1007/s00193-010-0290-y

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