Viscous, free-oscillation simulations with the Overflow solver are used to predict the aerodynamic behavior of non-lifting capsule shapes in the supersonic speed regime. Computations using hybrid Reynolds-averaged Navier-Stokes turbulence models are examined for two novel atmospheric-entry capsule configurations: an idealized inflatable decelerator concept, and the Orion Crew Module. The simulation results are validated against nonlinear aerodynamic models determined from free-flight ballistic-range data analysis. For the Orion Crew Module, two separate methods of reducing identical range data, along with common models tested in separate range facilities, are induded. The compu-tations demonstrate the efficiency and accuracy of dynamic simulations for developing a nonlinear aerodynamic performance database. Analysis indicates that the typical nonlinear, bluff-body behav-ior is characterized by a rate-dependent dynamic response, which is not currently accounted for in common aerodynamic models.
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