Simulator Diagnostics of the Early Phase Ignition Phenomena in a 105-mm Tank Gun Chamber

摘要

The early phase ignition phenomena in a 105-mm Tank gun chamber were investigated via diagnostics in a simulator. The study included the functioning of the ignition system, permeability of propellant bed to igniter gases, propellant bed compaction pressure wave formation, and flamespreading. Also examined were effects of the primer body configuration on ignition. The transitions found in the pressure rise and the flamespreading have been correlated with the flow change of the hot gases through the vent holes of the primer. Effects of high flow resistance in the propellant bed of small grains were seen in the recorded data. Compaction of the propellant bed could start in the very early stage of the ignition process. The addition of a vented tip to the M83 standard primer improved the uniformity of pressure distribution and flamespreading along the chamber length. The results obtained can serve as guidance for the development and assessment of new primers and interior ballistic cycle of the gun system.