Numerical Computation of Two Phase Flow in Gun Barrels

摘要

There are three or four imdependent variables and seventeen or more independent ones involved in the computer simulation of gun-barrel phenomena which is recognized as transient compressible, two-phase flow in a moving cordinate system. Two cmputer programs for predicting the distributions of velocities, pressures, and temperatures are reviewed. The major obstacle to making realistic predictions is ignorance of the precise laws governing interphase transport, turbulent mixing, particle-particle and particle-wall impacts, and chemical kinetics. It is argued that numerical modeling conducted at the particle-scale level, can be helpful. Numerical computations on grids of subparticle size confirm friction, heat transfer, and mass transfer laws. Hypotheses are needed for turbulence and particle impact.