Experimental Studies of Ignition Phenomena in One-Dimensional Propelling Charges
Abstract
During the past decade, several unsteady, two-phase flow interior ballistic models have been developed which include treatment of ignition and flamespread through the propellant bed. While all such models were originally formulated under the simplifying assumption of one-dimensional flow, efforts are now underway to provide multi-dimensional representations, as well as to improve the descriptions of constitutive physical process. One important step, however, along the road to a phenomenologically complete model should be a critical assessment of available one-dimensional codes by means of comparison to 'one- dimensional' experiments. To that end, we describe herein a series of four, well-instrumented, 'one-dimensional,' test firings conducted in the Navy 5-inch fiberglass breech gun. Two rounds were fired using Navy NOSOL 318 propellant, a solventless-processed gun propellant offering excellent control over grain dimensions and physical and chemical homogeneity. The other two rounds were fired with M30A1 triple-based gun propellant, employed in the Army 155-mm, M203, Propelling Charge. Data recorded during these tests included flame propagation, breech and sidewall gas pressure profiles, and sidewall case strains. Comparisons of experimental results with simple theoretical simulations of these events using the NOVA two-phase flow interior ballistics code are presented both to suggest possible areas of future concern to model developers and to assess the adequacy of current experimental techniques.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1981
- Accession Number
- ADA100298
Entities
People
- Albert W. Horst
- Thomas C. Minor
Organizations
- Ballistic Research Laboratory