FACTORS DETERMINING NATURE OF DYNAMIC VIVACITY CURVE DURING CLOSED VESSEL INVESTIGATIONS

摘要

It is assumed that the mechanism of gun propellant gases production is dependent on the knowledge ofpropellant grains geometry and adoption of a geometric model of propellant grains burning. In the paper,the authors analyse the influence of arrangement of propellant grains in a combustion chamber on thechanges of dynamic vivacity. The grains of the propellant charge have been piled up spontaneously atthe bottom of a combustion chamber or have been spaced separately, systematically on the whole circuitof a combustion chamber. The investigations were carried out with application of black powder ignitionand gas ignition for the same loading density. The results of closed vessel investigations showed that thecharacter of dynamic vivacity is determined not only by geometry of propellant grains but also by theconditions of heat transport between hot ignition gases and available burning surface of propellantgrains.