Author(s)

J. D'Elia, M. Storti & S. Idelsohn

Abstract

A CVBEM formulation for multiple profiles and cascades J. D'EKa, M. Storti, S. Idelsohn Gr^po (fe Tec^oZogm Mecamm &Z f^TEC, CCW7CET - Universidad National del Literal, Guemes 3450, 3000- Santa Fe, Argentina ABSTRACT A numerical algorithm based on the CVBEM (from Complex Variable Boundary Element Method) for plane incompressible potential flow around aerofoils and cascades is described. The method is based on the representation of the complex disturbance velocity by means of a Cauchy-type integral around the foil. The Cauchy density function is approximated piecewise linearly and a linear system on the nodal values is obtained by collocation at the nodes. The Kutta condition is imposed via a Lagrange multiplier, in contrast with the least-squares formulation used in a previous work[3]. For cascades, the problem is conformally mapped by a simple hyperbolic function (exponential or hyperbolic tangent) to a related problem with only one profile and one or two

Keywords