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03986aam a2200745Ia 4500 001 B2CD7AAEFE5F11E2B6A414D3DAD10320 003 SILO 005 20130806010419 006 m d f 007 cr mn||||||||| 008 080513s2006 dcua sb f000 0 eng d 035 $a (OCoLC)227899876 040 $a DTICE $c DTICE $d GPO $d MvI $d SILO 074 $a 0324-A-01 (online) 086 0 $a D 101.133:3860 100 1 $a Schmidt, John R. 245 10 $a Progress in the development of a multiphase turbulent model of the gas/particle flow in a small-caliber ammunition primer $h [electronic resource] / $c John R. Schmidt and Michael J. Nusca. 260 $a Aberdeen Proving Ground, MD : $b U.S. Army Research Laboratory, $c [2006] 300 $a 1 online resource (vi, 36 p.) : $b ill. 490 1 $a ARL-TR ; $v 3860 500 $a Title from title screen (viewed April 2, 2010). 513 $a Final; $b January 2005-December 2005. 500 $a "August 2006." 506 $a Approved for Public Release. 520 $a There is significant experimental evidence that burning particles of various chemical compositions and sizes are ejected from gun primers and that these particles interact with the propellant grains during main charge ignition. This explicit ignition phenomenon is thought to be incompatible with the implicit treatment of primer function in conventional interior ballistics codes and models. Generally, the primer efflux is treated as a hot gas that evolves from a specified region in the model's representation of the gun chamber (usually along the chamber centerline and near the breech). What amounts to an igniter table is arrived at by experimental means and by careful calibration of the interior ballistics simulation using gun firing data. With the advent of multidimensional, multiphase interior ballistics codes which employ coupled Eulerian-Lagrangian schemes to explicitly treat both the gas and solid phase, the time is ripe for a primer model that is commensurate with the availability of such an interior ballistics model. Progress in the development of a primer model that is compatible with the ARL-NGEN3 interior ballistics code and small-caliber weapons is described herein. The model is based on the One Dimensional Turbulence modeling approach that has recently emerged as a powerful tool in multiphase simulations. Initial results are shown for the model run as a stand-alone code and are compared to recent experiments with small-caliber primers. 504 $a Includes bibliographical references (p. 24-27). 536 $f 622618H8000 650 0 $a Ballistics, Interior 650 0 $a Propellants 650 0 $a Ordnance 650 0 $a Projectiles 650 17 $a Firearms $2 scgdst 650 27 $a Ballistics $2 scgdst 650 27 $a Fluid mechanics $2 scgdst 650 17 $a Turbulence $2 dtict 650 17 $a Gas flow $2 dtict 650 17 $a Gun chambers. $2 dtict 650 17 $a Ballistics, Interior $2 dtict 650 27 $a Functions $2 dtict 650 27 $a Simulation. $2 dtict 650 27 $a Chemical composition. $2 dtict 650 27 $a Coding. $2 dtict 650 27 $a Particles $2 dtict 650 27 $a Ammunition $2 dtict 650 27 $a Ignition. $2 dtict 650 27 $a Calibration $2 dtict 650 27 $a Propellant grains. $2 dtict 650 27 $a Solid phases. $2 dtict 650 27 $a Igniters. $2 dtict 650 27 $a Gunfire. $2 dtict 650 27 $a Firearms $2 dtict 650 27 $a Hot gases. $2 dtict 650 27 $a Tables(data) $2 dtict 650 27 $a Self contained. $2 dtict 650 27 $a Combustion $2 dtict 650 27 $a Readers (Primary) $2 dtict 650 27 $a Phase. $2 dtict 650 27 $a Models. $2 dtict 700 1 $a Nusca, Michael J. 710 2 $a U.S. Army Research Laboratory 830 0 $a ARL-TR (Aberdeen Proving Ground, Md.) $v 3860. 856 40 $u http://purl.access.gpo.gov/GPO/LPS121239 941 $a 1 952 $l USUX851 $d 20160825060100.0 956 $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=B2CD7AAEFE5F11E2B6A414D3DAD10320Initiate Another SILO Locator Search