MODEL OF INTERIOR BALLISTIC OF MORTAR BASED ON THERMODYNAMIC THEORY

Abstract

This paper presents a new approach to establishing the interior ballistic
algorithm for mortar systems based on thermodynamic theory. Contrary to
previous studies, the processes that occurred in the ignition charges and the gas
mixture properties in the barrel were considered in this study. The numerical
integration method has been used to solve the problem with high accuracy.
Numerical calculation applied on 100mm mortar. The calculation result is the
law of pressure in the combustion chamber and the law of movement of the
projectile in the barrel. These results are compared with the manufacturer's data
to evaluate the reliability of the mathematical model as well as the solution
method. According to the comparison between the simulation and the
manufacturer's data, the maximum errors of velocity of 3.27%. The results
obtained from this study are an important scientific basis for improving and
optimizing the design of mortar systems and weapons with similar structures.