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Title: Anatomy of a diffracting detonation in a circular arc of explosive

Abstract

Using high-resolution numerical simulation, study diffraction of a detonation as it traverses a 270° finite-thickness condensed-phase explosive arc. This geometry admits a steady solution in a frame rotating with angular speed ω 0, which thereby facilitates a detailed analysis of how the loss of energy from the detonation reaction zone due to the diffraction process slows the propagation of the detonation. There exists a region of subsonic flow, between the detonation shock and the curve of sonic flow (labelled the DDZ), which is responsible for setting ω 0. Although the DDZ spans the entire thickness for thin arcs, it is localized to a region near the inside surface as the arc is thickened. Furthermore the explosive energy release near this inside surface plays a disproportionate role in the diffraction process.

Authors:
ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1434432
Report Number(s):
LA-UR-17-31328
Journal ID: ISSN 0022-1120; applab
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Fluid Mechanics
Additional Journal Information:
Journal Volume: 840; Journal ID: ISSN 0022-1120
Publisher:
Cambridge University Press
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; compressible flows; detonation waves

Citation Formats

Bdzil, John Bohdan. Anatomy of a diffracting detonation in a circular arc of explosive. United States: N. p., 2018. Web. doi:10.1017/jfm.2018.81.
Bdzil, John Bohdan. Anatomy of a diffracting detonation in a circular arc of explosive. United States. doi:10.1017/jfm.2018.81.
Bdzil, John Bohdan. Thu . "Anatomy of a diffracting detonation in a circular arc of explosive". United States. doi:10.1017/jfm.2018.81. https://www.osti.gov/servlets/purl/1434432.
@article{osti_1434432,
title = {Anatomy of a diffracting detonation in a circular arc of explosive},
author = {Bdzil, John Bohdan},
abstractNote = {Using high-resolution numerical simulation, study diffraction of a detonation as it traverses a 270° finite-thickness condensed-phase explosive arc. This geometry admits a steady solution in a frame rotating with angular speed ω0, which thereby facilitates a detailed analysis of how the loss of energy from the detonation reaction zone due to the diffraction process slows the propagation of the detonation. There exists a region of subsonic flow, between the detonation shock and the curve of sonic flow (labelled the DDZ), which is responsible for setting ω0. Although the DDZ spans the entire thickness for thin arcs, it is localized to a region near the inside surface as the arc is thickened. Furthermore the explosive energy release near this inside surface plays a disproportionate role in the diffraction process.},
doi = {10.1017/jfm.2018.81},
journal = {Journal of Fluid Mechanics},
number = ,
volume = 840,
place = {United States},
year = {2018},
month = {2}
}

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Free Publicly Available Full Text
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Cited by: 1 work
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Figures / Tables:

Figure 1 Figure 1: A sketch of the main features for inert shock diffraction (subfigure a) compared with the solution of detonation diffraction for an idealized, CJ explosive (subfigure b).

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Works referenced in this record:

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journal, October 2016

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Stable detonation wave propagation in rectangular-cross-section curved channels
journal, February 2012


    Figures / Tables found in this record:

      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.