Precursors in two-phase detonation: Occurrence of a contact discontinuity

Irina Brailovsky, Gregory Sivashinsky*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This paper is concerned with detonation-propelled shocks (precursors) occurring in gas-permeable charges. It is shown that the basic aspects of the event may successfully be reproduced within a one-dimensional two-phase picture widely employed in the modelling of porous energetic materials. Precursor shocks are sustained by intense gasification of the solid phase, provided the ignition pressure (Pign) exceeds a certain critical level. At high enough Pign, the post-shock flow is found to acquire a contact discontinuity. Although this pattern is compatible with the associated self-similar solution, the question of the mechanism governing its formation remains open.

Original languageEnglish
Pages (from-to)833-855
Number of pages23
JournalCombustion Theory and Modelling
Volume19
Issue number6
DOIs
StatePublished - 2 Nov 2015

Keywords

  • channel effect
  • contact discontinuities in gas flows
  • detonation in tubular charges
  • gas-permeable explosives
  • precursors in two-phase detonation

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