A contribution to the turbulence of interior ballistics flow.

The compressible, viscous, turbulent gas expansion flow behind an accelerating projectile moving in a gun tube is investigated. Turbulence is described by two algebraic models, viz. the models by Cebeci-Smith- Mosinskis and Baldwin-Lomax, as well as by a one-equation model for the turbulent kinetic energy. Computational results obtained by application of these models are compared to experimental data obtained with two low pressure gun simulators. Also numerical predictions are reported for the flow behind a projectile under more realistic interior ballistic conditions.