CFD RANS simulation of 2D circulation control airfoil

Abstract

In the present work, the Circulation Control technology applied to an airfoil with a discontinuous not-rounded surface is explored. First a numerical model is constructed and compared against a physically-tested and well known Circulation Control airfoil. Then the model is modified to analyze the airfoil with discontinuous not-rounded surfaces. This last numerical model suggests that, if enough jet momentum is applied, the Coanda effect can be induced in the airfoil with discontinuous not-rounded surfaces. The model also suggests that when the Coanda effect is induced, a small vortex is generated at the geometric discontinuities and the flow acts as if the geometry was in fact rounded.