Accession Number:

ADA128034

Title:

Experimental Studies of Multidimensional Two-Phase Flow Processes in Interior Ballistics

Descriptive Note:

Memorandum rept. Oct 1980-Sep 1981

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1983-04-01

Pagination or Media Count:

42.0

Abstract:

This paper presents work conducted in the 155-mm interior ballistic simulator at the Ballistic Research Laboratory to produce such data. The simulator employed disposable chambers of plastic and fiberglass that permitted direct visualization, through high-speed photography, of gas- and solid-phase flow during the early portion of the interior ballistic cycle. Solid-phase dynamics were further monitored via flash radiography. In addition to breech and wall pressure measurements along the length of the chamber, data were obtained for some firings with the chamber and the propellant bed for gas pressure and propellant heating using thermocouples mounted on grain surfaces. This investigation into multidimensional flow structure was carried out through examination of the ignition portion of the cycle of several charge types stick and granular charges of M30A1 propellant loaded in a one- dimensional configuration, to investigate the pressurization and flamespread in each multiple-increment charges with varying chamber atmosphere and igniter, to study gas-phase combustion and an M203-type charge, to investigate internal charge pressurization and heat transfer to the propellant.

Subject Categories:

  • Ammunition and Explosives
  • Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE