ON VORTEX SHEET INTENSITY COMPUTATION FOR AIRFOILS WITH ANGLE POINT IN VORTEX METHODS

Two-dimensional problem of numerical flow simulation around an airfoil is considered. The flow is assumed to be incompressible, so meshless lagrangian vortex method can be used to simulate the flow. The aim of this research is to investigate the accuracy of two different approaches to boundary conditions satisfaction, namely Nscheme and T-scheme, in case of flow simulation around airfoils with angle points. The asymptotic behavior of the solution, which is singular in the neighborhood of the angle point, is known. Different algorithms of the airfoil discretization into panels are implemented, and the accuracy of the considered numerical schemes is estimated. The obtained results show that the T-scheme provides more accurate solution in all considered cases in comparison to the N-scheme, especially at non-uniform airfoil discretization.