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Title: The Blast Parameters Spanning the Fireball from Large Hemispherical Detonations of C-4

Abstract

In this study, large (~45.4 kg) hemispheres of C-4, detonated on the ground, were instrumented to measure blast parameters at scaled distances between 0.53 to 1.78 m kg-1/3. The results from free-field and reflected pressure gauge measurements made inside and just outside the maximum extent of the fireball are presented. They show that the predictions from a particular table for scaled TNT charges are broadly consistent with the time-of-arrival, initial peak pressure, positive duration and positive impulse measurements. However, this agreement is poorer through the location of the primary and secondary (delayed) fireball (0.71–1.48 m kg-1/3), but better closer in and further away. Additionally, for individual detonations with closely located gauges, significant variations between peak pressures and times-of-arrival are measured. Lastly, this suggests a strong effect from the interface instabilities present in the near-field.

Authors:
ORCiD logo [1];  [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:
1469550
Report Number(s):
LA-UR-18-21835
Journal ID: ISSN 0721-3115
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Propellants, Explosives, Pyrotechnics
Additional Journal Information:
Journal Volume: 43; Journal Issue: 7; Journal ID: ISSN 0721-3115
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; Explosion, Blast, Air-Shock

Citation Formats

Rae, Philip John, and Mcafee, John Michael. The Blast Parameters Spanning the Fireball from Large Hemispherical Detonations of C-4. United States: N. p., 2018. Web. https://doi.org/10.1002/prep.201800071.
Rae, Philip John, & Mcafee, John Michael. The Blast Parameters Spanning the Fireball from Large Hemispherical Detonations of C-4. United States. https://doi.org/10.1002/prep.201800071
Rae, Philip John, and Mcafee, John Michael. Mon . "The Blast Parameters Spanning the Fireball from Large Hemispherical Detonations of C-4". United States. https://doi.org/10.1002/prep.201800071. https://www.osti.gov/servlets/purl/1469550.
@article{osti_1469550,
title = {The Blast Parameters Spanning the Fireball from Large Hemispherical Detonations of C-4},
author = {Rae, Philip John and Mcafee, John Michael},
abstractNote = {In this study, large (~45.4 kg) hemispheres of C-4, detonated on the ground, were instrumented to measure blast parameters at scaled distances between 0.53 to 1.78 m kg-1/3. The results from free-field and reflected pressure gauge measurements made inside and just outside the maximum extent of the fireball are presented. They show that the predictions from a particular table for scaled TNT charges are broadly consistent with the time-of-arrival, initial peak pressure, positive duration and positive impulse measurements. However, this agreement is poorer through the location of the primary and secondary (delayed) fireball (0.71–1.48 m kg-1/3), but better closer in and further away. Additionally, for individual detonations with closely located gauges, significant variations between peak pressures and times-of-arrival are measured. Lastly, this suggests a strong effect from the interface instabilities present in the near-field.},
doi = {10.1002/prep.201800071},
journal = {Propellants, Explosives, Pyrotechnics},
number = 7,
volume = 43,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: A cross-section of the C-4 charge used.

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