Jet penetration of high explosive

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It is found that a transition between two flow patterns takes place in thick HE targets. In this case, the jet will initially propagate into the HE at the same rate as into an inert material of the same density. The part of the jet that has stagnated and is flowing nearly co-axially with the incoming jet (but at a much lower speed) is being forced toward the surface of the incoming jet by the pressure of the reaction products but has not as yet made contact. After it makes contact, both axial and perpendicular momentum transfer takes place between ... continued below

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237 Kilobytes pages

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Poulsen, P. August 11, 1999.

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Description

It is found that a transition between two flow patterns takes place in thick HE targets. In this case, the jet will initially propagate into the HE at the same rate as into an inert material of the same density. The part of the jet that has stagnated and is flowing nearly co-axially with the incoming jet (but at a much lower speed) is being forced toward the surface of the incoming jet by the pressure of the reaction products but has not as yet made contact. After it makes contact, both axial and perpendicular momentum transfer takes place between the two jet components. After this transition, a new steady state will develop for the propagating jet, with the unperturbed front of the jet propagating at a slower rate than previously. The perturbed front of the jet is still propagating at or near the original rate, having had relatively little axial momentum exchange. However, it has acquired radial momentum and is spreading out as it is propagating; it is therefore becoming less capable of penetrating downstream targets. It is the unperturbed part of the jet that is capable of penetrating downstream targets. A calculational method for predicting this case is presented in this report.

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237 Kilobytes pages

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  • 18th International Symposium and Exhibition on Ballistics, San Antonio, TX (US), 11/15/1999--11/19/1999

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  • Report No.: UCRL-JC-135335
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 15176
  • Archival Resource Key: ark:/67531/metadc622477

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 11, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 1:31 p.m.

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Poulsen, P. Jet penetration of high explosive, article, August 11, 1999; California. (digital.library.unt.edu/ark:/67531/metadc622477/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.