Generic Extruded Propellant Grain Surface and Volume Calculations

Report No. ARL-TR-3288
Authors: Ronald D. Anderson
Date/Pages: August 2004; 98 pages
Abstract: Experimental propelling charges that have non-standard extruded granular shapes require calculations of available burning surface area in order to be simulated by interior ballistic (IB) modeling applications. Formerly, extensive hand calculations or development of a one-of-a-kind form function was necessary in order to analyze the changes in surface area whenever nonstandard grain geometries were to be used in experimental gun propelling charges. A quick, easy-to-use computer program has been developed to calculate surface and volume of propellant grains versus depth burning by an analysis of propellant slivers; the results are then added to create a full-grain form function. The resultant data can be used in IB programs to estimate maximum pressures and projectile velocities from experimental propelling charges and gun systems.
Distribution: Approved for public release
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Last Update / Reviewed: August 1, 2004