Wake effects on the prediction of transonic viscous flows around airfoils with an Euler/Boundary layer interaction approach

A semi-inverse viscous/inviscid coupling technique for the calculation of compressible flows is presented. Euler equations in integral form are solved in the inviscid part and integral compressible boundary layer equations in inverse form are sotvea tn the viscous one. Wake computation has been included for both displacement and curvature effects. Interaction is realized using the equivalent sources method. The technique has been applied to the calculation of the aerodynamic characteristics of airfoils both in subsonic and transonic regimes. The importance of body displacement, wake displacement and wake curvature viscous contributions has been evaluated and discussed. Different ways of computing the equivalent sources fluxes in the wake and the influence of the fixed wake dividing streamline shape have been investigated.