Abstract
Flow around an airfoil with a stationary or oscillating spoiler has been numerically simulated by solving the unsteady turbulent compressible two-dimensional, full Navier-Stokes equations. In the stationary spoiler case computations were carried out at three spoiler deflection angles, 15, 30, and 60 deg. The results were compared with the existing experimental data. To analyze the complex unsteady flow induced by the relative motion of two rigidly connected bodies, an overlapped-dynamic, grid-generation method has been developed and applied to the oscillating spoiler problem. The effects of the reduced frequency and the amplitude of the oscillating spoiler were investigated and the potential capability of the oscillating spoiler for the application of active control technology was demonstrated
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