FLOW ABOUT A SLOTTED CYLINDER-AIRFOIL COMBINATION IN A WIND-TUNNEL

The flowfield around a gust generator device, an airfoil/rotating slot ted cylinder (RSC) system, is numerically simulated using the general- purpose finite element program FIDAP. The how is assumed to be quasist eady, turbulent, incompressible, and two dimensional, The turbulence i s modeled far from the walls by a high Reynolds number k-epsilon model . In the near-wall region, which includes the viscous sublayer, the mi xing length concept is used to model turbulence, The numerical analysi s treats the time-varying flow around the gust generator device as qua sisteady and solves the flow position by-position as the RSC rotates. The variation of lift and drag as a function of the rotation angle and as a function of the gap between the airfoil and the rotating slotted cylinder is calculated.