Two-phase Flow Simulation For
Interior Ballistics
Author(s)
H. Miura & A. Matsuo
Abstract
A two-dimensional axisymmetric simulation in the interior ballistic system was
carried out using a two-phase CFD code by an Eulerian/Eulerian approach. The
interior ballistics predict the phenomena in gun firings by means of the
simulation of solid propellant combustion and gas generation. The inviscid
equations for mass, momentum and energy of the gas phase and equations of the
solid phase contain the terms for interphase properties such as mass of gas
generated by solid decomposition, drag between gas and solid phases, and
combustion heat. The calculation is started with the igniting of solid propellants,
and the end of the calculation is the time when a projectile reaches the gun
muzzle. For solid propellants charged in a gun chamber, smokeless gunpowder
was used. The simulated pressure profiles in the chamber and the muzzle
velocity of the projectile quantitatively agree with the experimental data. The
simulation of the gun chamber shows the chain of igniting solid propellants, the
propagation of the pressure wave and the movement of the solid phase.
Keywords: interior ballistics CFD, solid propellant, two-phase flow.
1 Introduction
Gun system, which is one of propulsion unit, has remarkable capacity to
accelerate projectile by supersonic velocity instantaneously. In gun systems, a
projectile is propelled by pressurization of the chamber caused by combustion of
solid propellant. For this analysis, the interior ballistics has been used. The
interior ballistics predicts the phenomena in gun firings by means of simulations
of solid propellant combustion and gas generation [1]. The calculation is started
with igniting solid propellants, and the end of calculation is the time when a
projectile reaches the gun muzzle. These phenomena in gun systems are should
Keywords
interior ballistics CFD, solid propellant, two-phase flow.
Related Book
Other papers in this volume
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