Accession Number : ADA184770
Title : Erosive Burning Study of Stick Propellants.
Descriptive Note : Interim rept.,
Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MECHANICAL ENGINEERING
Personal Author(s) : Hsieh,W H ; Char,J M ; Zanotti,C ; Kuo,K K
PDF Url : ADA184770
Report Date : 06 Aug 1987
Pagination or Media Count : 11
Abstract : A theoretical model was solved numerically for simulating erosive-burning processes occurring inside the center perforation of an unslotted NOSOL-363 stick propellant. Results show that the erosive-burning phenomenon is caused by the enhanced heat feedback from the gas phase to solid phase resulting from the combined effect of increased turbulent mixing and reduction in flame stand-off distance from the burning surface. The real-time X-ray radiography system was demonstrated to be a powerful and reliable tool for nonintrusive measurements of instantaneous burning rates. A model was validated by experimental data in terms of time variation of internal diameter distributions. Thermal wave structures of NOSOL-363 stick propellants under erosive- and strand-burning conditions were measured by fine-wire thermocouples.
Descriptors : *GUN PROPELLANTS, *EROSIVE BURNING, PROPELLANT GRAINS, BURNING RATE, TURBULENCE, RADIOGRAPHY, COMBUSTORS
Subject Categories : Ammunition and Explosives
Combustion and Ignition
Distribution Statement : APPROVED FOR PUBLIC RELEASE