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
      Armor
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE