Influence of Rupture Size on Dispersion Characteristics of Propellant Particles During Ignition and Flame Spreading Processes for Modular Charges

Abstract During ignition and flame spreading processes, the difference in initial rupture size for end cover of cartridge may affect final accumulation form propellant particles. A 3D unsteady state gas -solid two-phase flow model was established based on phase-grain phase coupling method to simulate distribution particles chamber under different sizes cover. The simulation results showed that at fan-shaped perforation area modular cartridge, 6 simulated working conditions central angles 0, 30, 60, 90, 120 150 degrees, presented a combined gentle slope accumulation, horizontal steep from primer side pressure control diaphragm side. When angle corresponding increased 0 ° °, axial length 269 mm 331 mm, part average thickness 18.1 23.5 proportion decreased 70.3% 63.8%. larger cover, longer thicker grain lower