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LEADER 04340nam a2200853Ia 4500

001 ocn227899876;

003 OCoLC;

005 20141212051649.0;

006 m d f ;

007 cr mn|||||||||;

008 080513s2006 dcua sb f000 0 eng d;

027 a| ARL-TR-3860;

029 0 a| DTICEb| ADA454890;

035 a| (Sirsi) o227899876;

035 a| (OCoLC)227899876;

040 a| DTICEc| DTICEd| GPOd| UtOrBLW;

049 a| ERE#;

074 a| 0324-A-01 (online);

086 0 a| D 101.133:3860;

100 1 a| Schmidt, John R.=| ^A1007430;

245 10 a| Progress in the development of a multiphase turbulent model of the gas/particle flow in a small-caliber ammunition primer /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 pages) :b| illustrations.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| ARL-TR ;v| 3860;

500 a| Title from title screen (viewed April 2, 2010).;

500 a| "August 2006.";

504 a| Includes bibliographical references (p. 24-27).;

506 a| Approved for Public Release.;

513 a| Final;b| January 2005-December 2005.;

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.;

536 f| 622618H8000;

650 0 a| Ballistics, Interior.=| ^A321350;

650 0 a| Propellants.=| ^A169356;

650 0 a| Ordnance.=| ^A80096;

650 0 a| Projectiles.=| ^A173497;

650 17 a| Guns.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| Interior ballistics.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| Guns.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| Primers.2| dtict;

650 27 a| Phase.2| dtict;

650 27 a| Models.2| dtict;

700 1 a| Nusca, Michael J.=| ^A1018497;

710 2 a| U.S. Army Research Laboratory.=| ^A367731;

830 0 a| ARL-TR (Aberdeen Proving Ground, Md.) ; 3860.?| UNAUTHORIZED;

856 40 u| https://purl.fdlp.gov/GPO/LPS121239;

949 a| Click on web addressw| ASISh| JOYNER94;

998 a| 2276606;

998 a| u2276606;

596 a| 1;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 2276606-1001l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 5/18/2010x| EDOCUMENTz| JERESOURCE;

Progress in the development of a multiphase turbulent model of the gas/particle flow in a small-caliber ammunition primer / John R. Schmidt and Michael J. Nusca.

Author/creator	Schmidt, John R.
Other author	Nusca, Michael J.
Other author	U.S. Army Research Laboratory.
Format	Electronic
Publication Info	Aberdeen Proving Ground, MD : U.S. Army Research Laboratory, [2006]
Description	1 online resource (vi, 36 pages) : illustrations.
Supplemental Content	https://purl.fdlp.gov/GPO/LPS121239
Subjects	Ballistics, Interior. Propellants. Ordnance. Projectiles.

Series	ARL-TR ; 3860 ARL-TR (Aberdeen Proving Ground, Md.) ; 3860. UNAUTHORIZED
Abstract	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.
General note	Title from title screen (viewed April 2, 2010).
General note	"August 2006."
Bibliography note	Includes bibliographical references (p. 24-27).
Access restriction	Approved for Public Release.
Report note	Final; January 2005-December 2005.
Funding information	622618H8000
Technical rpt#	ARL-TR-3860
GPO item number	0324-A-01 (online)
Govt. docs number	D 101.133:3860

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Progress in the development of a multiphase turbulent model of the gas/particle flow in a small-caliber ammunition primer / John R. Schmidt and Michael J. Nusca.

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