Search

Recently, more and more researchers have shown interest in studying the temperature gradient of unconventional shots, including shots with a travelling charge. The paper considers the possibility of taking into account the effect of the initial charge temperature, in particular, on the travelling charge from the pasty propellant, in the form of a linear relationship, through the use of a mathematical tool for qualitative analysis of experimental data. A study was made of taking into account the influence of the temperature coefficient in one or several parameters characterizing the propellant combustion on the ballistic characteristics of the shot. It is shown that for pasty propellants, taking into account the temperature coefficient in the travelling charge dispersion rate and the layer-by-layer burning rate of dispersed propellant particles, as well as the dependence of the transition pulse to the accelerated TC burning mode on the initial charge temperature, provides good agreement on the shapes of pressure variation curves in the loading chamber and velocity projectile in the barrel. [ABSTRACT FROM AUTHOR]

As it was shown earlier in the authors works, powder propellant charge modernization is possible by using paste-like propellants as an upper semi-charge, used as a travelling charge to push the projectile in the barrel. Advantages of this technology is to increase a loading density and a propellant charge mass, and, consequently, to increase propellant charge energy. The use of this technology leads to a redistribution of the energy of combustion products in the projection space. In this paper, there is carried out a theoretical parametric study of the muzzle bullet velocity increasing possibility while maintaining maximum pressure using model paste-like propellants, under conditions of a Mosin rifle shot. Theoretical results obtained and analyzed. A comparison is carried out on the ballistic shot parameters of a classical loading scheme and a scheme with a combined propelling charge using model pasty propellants. [ABSTRACT FROM AUTHOR]