Solid Rocket Motor Internal Ballistics Simulation Using Eulerian Multiphase Models

Solid rocket motors, fuelled by aluminum, are characterized by a two-phase flow that plays an essential role in several aspects of the motor behavior. In the present work, the dispersed phase is considered via an advanced Eulerian model that exploits a pseudo-pressure term deprived of any calibration need in order to overcome the intrinsic limitations of the basic Eulerian monokinetic closure. Numerical simulations performed on different geometries and setups show promising results, ensuring the possibility to investigate solid rocket motors flowfield with relatively low computational costs.