An implicit numerical analysis for two-dimensional, two-phase turbulent interior ballistic flows

A two-dimensional implicit interior ballistics computer code has been developed to solve the turbulent two-phase flow in a gun tube using two-fluid model equations obtained by a formal averaging approach. This study addresses the detailed prediction of flow properties in a gun barrel during firing beginning with primer discharge and ending with the projectile exiting the tube. Calculations are presented for two-dimensional, two-phase nonreacting flow in a model gun tube with adiabatic wall conditions utilizing 3-micron and 100-micron diameter particles. These results demonstrate the need for a particle-wall interaction model. The present effort represents a rigorous time-dependent solution of the multidimensional governing equations for the viscous two-phase flow in a gun tube, and provides the framework for further evaluation and development of interphase correlations and two-phase flow turbulence models.