Modeling the Wake as a Continuous Vortex Sheet in a Potential-Flow Solution Using Vortex Panels

Abstract : An investigation was made to determine the advantages of modeling the wake as a continuous vortex sheet in an unsteady potential-flow computer model. The existing program modeled the body as a continuous vortex sheet, and modeled the wake as discrete vortex cores employing principles of vortex lattice methods. A method is developed to approximate the wake with triangular vortex panels. The method accounts for redistributing vortex strength as the panels expand and deform. Comparisons are made with results of the original program for a rectangular wing at varying angles of attack. Limited results suggest the method is valid, and areas for further study are recommended. Keywords: Aerodynamic characteristics; Vortices; Vortex shedding; Trailing vorticies; Fluid dynamics; Theses.