Accession Number:

ADA207728

Title:

Flamespreading Measurements and Mechanisms in Perforated LOVA Gun Propellants

Descriptive Note:

Final rept. Mar 1985-Sep 1986

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1989-03-01

Pagination or Media Count:

22.0

Abstract:

Flamespreading rates in simple linear arrays of individual grains have been measured for two lots of LOVA gun propellant. Differences were sought which might explain the pressure behavior exhibited in ballistic tests. Although no significant differences were found, an abrupt pressure threshold for rapid flamespreading involving convective burning in the perforations was found. Further experiments with parallel solid strands separated by a variable gap width revealed a second mode for rapid flamespreading. Both modes are likely to be important during the ignition transient in guns and may present opportunities for control over ignition delays and reliability through grain geometry design. Keywords Flamespreading, LOVA propellant, Burning rates, Solid propellants.

Subject Categories:

  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE