Abstract
The technique of large-eddy simulation (LES) was used to study the influence and the resulting flow mechanisms of the active flow control applied to a two-dimensional vehicle geometry. Duplication of a previous experimental study performed with LES was used to verify the numerical approach. This was followed with an exploration of the influence of flow actuation on the near-wake flow and resulting aerodynamic forces. Not only was good agreement with the previous experimental study obtained, but new knowledge was gained in the form of complex interaction of the actuation with the coherent flow structures. The resulting time-averaged flow shows a strong influence of the extension of the actuation slits and the lateral solid walls on the near-wake flow structures and thereby on the resulting drag.
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