An Algorithm for the Calculation of the Potential Flow about an Arbitrary Two Dimensional Aerofoil. G.U. Aero Report 8502

Abstract

A vortex panel method has been developed to calculate the potential flow about an arbitrary two dimensional aerofoil or axisymmetric shape at fixed incidence in a steady, uniform, irrotational, incompressible flow. The procedure replaces the contour by a suitably inscribed polygon, on which surface vorticity varies linearly and continuously along the panel and is piecewise continuous at the panel corners. The Neumann boundary condition is satisfied at control points situated at the midpoint of each panel and the classical Kutta condition is specified at the trailing edge by setting the net vorticity there equal to zero. This particular algorithm offers much flexibility in the treatment of a greater range of aerofoil geometries and at higher incidence than other surface singularity methods. Programme flow charts and FORTRAN code listings are given in the User Guide (1)

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