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 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.
- 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. https://doi.org/10.1017/jfm.2018.81
Bdzil, John Bohdan. Thu .
"Anatomy of a diffracting detonation in a circular arc of explosive". United States. https://doi.org/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 = {Thu Feb 08 00:00:00 EST 2018},
month = {Thu Feb 08 00:00:00 EST 2018}
}
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Cited by: 2 works
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Figures / Tables:
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:
Steady detonation propagation in a circular arc: a Detonation Shock Dynamics model
journal, October 2016
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Detonation propagation in a circular arc: reactive burn modelling
journal, November 2017
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journal, September 2007
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Stable detonation wave propagation in rectangular-cross-section curved channels
journal, February 2012
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- Combustion and Flame, Vol. 159, Issue 2
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.