Modelling of Classical and ETC Manometric Closed Vessel Tests
Résumé
In the scheme of the French ETC Programme, we study Ihe modelling of ignition and combustion of propelling charges and offheir effects. In this paper, we evocate the evolution of the research performed. We analyse 460 cm3 manometric closed vessel test results to estimate combustion rates of several single base gun propellants, energy losses to the bomb wall and their possible models. The state of the theoretical background for models is presented. The experimental results are obtained with classic hot wire ignition and 20, 30 and 40 kJ plasma ignition. The analysis of these results shows less significant enhancement of apparent combustion rate than for double base propellant results we presented at 19fh ISB. We are developing an elementary global code which simulates these manometric closed vessel tests. This model takes into account the total volume itself and not yet the plasma torch and the vessel. The models tested for energetic flux arc based on simple physical principles as presented and applied to one classical single base propellant shot where the best fit with the experimental data is sought.