High performance computing simulations for a subsonic projectile with jet

摘要

This paper describes a computational study undertaken to consider the aerodynamic effect of small tiny jets as a means to provide the control authority needed to maneuver a projectile at low subsonic speeds. Scalable Navier-Stokes computational technique has been used to obtain numerical solutions for the unsteady jet-interaction flow field for a projectile at subsonic speeds. Computed results have been obtained at a low subsonic speed at zero degree angle of attack. Qualitative flow field features show the interaction of the time-dependent jet with the free stream flow. Numerical results show the effect of the jet on the flow field and surface pressures and, hence, on the aerodynamic coefficients. Unsteady jet results have been obtained for a two-dimensional jet flow and compared with experimental data for validation. The same unsteady jet modeling technique has been applied to a subsonic projectile. These numerical results are being assessed to determine if small tiny jets can be used to provide the control authority needed for maneuvering munitions in lieu of canards and fins.