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Study on turbulence in interior ballistics flows.

Studie zur Turbulenz in innenballistischen Strömungen
: Heiser, R.; Garloff, J.


Journal of propulsion and power 8 (1992), Nr.1, S.59-65
ISSN: 0748-4658
Fraunhofer EMI ()
algebraic model; algebraisches Modell; Eingleichungsmodell; experiment; Innenballistik; interior ballistics; Navier-Stokes equation; Navier-Stokes-Gleichung; one-equation model; turbulence; Turbulenz

The compressible, viscous, turbulent gas expansion flow behind an accelerating projectile moving in a gun tube is investigated by solving the Navier-Stokes equations. For future theoretical investigations of the heat transfer from the hot gases to the walls, a reliable modeling of the turbulence is needed. Turbulence is described by two algebraic models, namely, the models by Cebeci-Smigh-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.