An elementary model for fast detonations in tubular charges. Issue 4 (4th July 2019)

• Record Type: Journal Article
• Authors: Brailovsky, Irina; Kagan, Leonid; Gordon, Peter; Sivashinsky, Gregory
• Is Part Of: Combustion theory and modelling. Volume 23:Issue 4(2019)
• Page Start: 573
• Page End: 591
• Publication Date: 2019-07-04
• Subjects: tubular charges -- cavitated charges -- layered charges -- channel effect -- gas-permeable explosives -- two-phase detonations -- weak detonations; Combustion -- Mathematical models -- Periodicals; 541.361
• DOI: 10.1080/13647830.2019.1566573
• Languages: English
• ISSNs: 1364-7830

Abstract

Abstract : The paper is concerned with the experimentally known phenomenon that the detonation velocity of a tubular charge may markedly exceed that of a homogeneous charge of the same explosive. It is shown that the effect may be successfully reproduced using a simple quasi-one-dimensional two-layer model assuming the gas–solid system to be isothermal and the volumetric fraction of the solid phase to be small. In view of a considerable drop of the burned gas pressure/density, compared to the Chapman–Jouguet case, fast detonation may be perceived as a variety of weak (undercompressed) detonation.