UNSTEADY AERODYNAMIC SIMULATIONS OF A CANARD-CONTROLLED PROJECTILE AT LOW TRANSONIC SPEEDS

This paper describes a computational study undertaken to compute the unsteady freeflight aerodynamics of an asymmetric canard-controlled finned projectile. Numerical simulations have been performed for this projectile without and with canard maneuver using an advanced coupled computational fluid dynamics (CFD)/rigid body dynamics (RBD) technique. The canard control is provided using canard deflections that are synchronous with the spin of the projectile so that the maximum canard deflections are achieved with the canards in horizontal position and are zero when the canards are vertical. Computed results have been obtained using coupled CFD/RBD virtual fly-out simulations and are presented for this canard-controlled projectile showing actual time-dependent response of the flight vehicle and the resulting unsteady aerodynamics with canard-control.

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