Ignition Transients and Pressurization in Closed Chambers
Technical rept. 1 Dec 1973-30 Nov 1974
PRINCETON UNIV NJ
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Pressure versus time data obtained from igniting and burning propellants in highly loaded closed chambers loading densities between 0.1 and 0.3 gcc are being used to evaluate propellants in empirical quality and production control procedures. Interpretations obtained from such production control devices are hampered by uncertainties concerning ignition delays, dynamic burning, heat loss, propellant surface area versus distance burned, and real gas effects. In this study, attention is focused on devising a closed chamber experiment for measuring dynamic burning rates and on developing a comprehensive analytical model of the experiment. Features of the model include the energy equation, heat-up to ignition, generalized real gas effects, and dynamic burning. Calculated results lead to improved methods for analyzing and reporting closed chamber results so as to include information on the dynamic processes that dominate ignition and the early stages of pressurization.
- Ammunition and Explosives
- Combustion and Ignition