Full-field peak pressure prediction of shock waves from underwater explosion of cylindrical charges

Lei Liu, Rui Guo, Ke Gao, Ming Chao Zeng

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
1 Downloads (Pure)

Abstract

Cylindrical charge is a main form in most application of explosives. By employing numerical calculation and an indirect mapping method, the relation between peak pressures from underwater explosion of cylindrical and spherical charges is investigated, and further a model to predict full-field peak pressures by the former one is developed and then verified by experiments. Besides, a method to intuitively sketch the corresponding orientational performance is proposed and discussed. The results indicate the following: when R/R0 ranges from 12 to 100, the mapping relation is nearly dominated by the amplitude similarity constant Kp, and an approximate shifted sine relation between Kp/K0 and action angle exists; in cases that L/d is over 1.5, the prediction model shows a good agreement with experimental data, with most errors below 10% and it is also universally applicable for different explosives; the directivity of peak pressure distribution in underwater explosion is continuously improved along the increasing L/d but no significant influence appears after L/d becomes over 5.

Original languageEnglish
Pages (from-to)912-920
Number of pages9
JournalPropellants, Explosives, Pyrotechnics
Volume42
Issue number8
DOIs
Publication statusPublished - 1 Aug 2017

Keywords

  • cylindrical charge
  • mapping relation
  • orientational performance
  • peak pressure
  • underwater explosion

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