NDLI: Simplified modeling of blast waves from metalized heterogeneous explosives

Content Provider	Springer Nature Link
Author	Zarei, Z. Frost, D. L.
Copyright Year	2011
Abstract	The detonation of a metalized explosive generates a complex multiphase flow field. Modeling the subsequent propagation of the blast front requires a detailed knowledge of the metal particle dynamics and reaction rate. Given the uncertainties in modeling these phenomena, a much simpler, 1D compressible flow model is used to illustrate the general effects of secondary energy release due to particle reaction on the blast front properties. If the total energy release is held constant, the blast pressure and impulse are primarily dependent on the following parameters: the proportion of secondary energy released due to afterburning, the rate of energy release, the location the secondary energy release begins, and the range over which it occurs. Releasing the total energy over a longer time period in general reduces the peak blast overpressure at a given distance. However, secondary energy release reduces the rate of decay of the shock pressure, increases the local gas temperature and hence increases the velocity of the secondary shock front. As a result, for certain values of the above parameters, the peak blast impulse may be increased by a factor of about two in a region near the charge. The largest augmentation to the near-field peak impulse results when the secondary energy is released immediately behind the shock front rather than uniformly within the combustion products.
Starting Page	425
Ending Page	438
Page Count	14
File Format	PDF
ISSN	09381287
Journal	Shock Waves
Volume Number	21
Issue Number	5
e-ISSN	14322153
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-05-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Blast waves 1D modeling Afterburning Metalized explosive Unconfined explosions Blast impulse Engineering Thermodynamics, Heat and Mass Transfer Acoustics Fluid- and Aerodynamics Thermodynamics Condensed Matter Physics Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanical Engineering

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