抄録
It is important in the flow around cascades, helicopter rotors, and flaps, to study the nonlinear interaction of forces on each foil and the wake patterns. In this paper, we construct a numerical method for the unteady imcompressible flow around two·dimensional oscillating multi-aerofoils by using both the discrete vortex approximation and the surface-singularity method. In this method, a simple Kutta condition is proposed and the flow around the airfoils is simulated by distributing vorticities linearly on the surface of the airfoils and point vortices in the wake. In this paper, the numerical calculation is done for a single foil. The numerical analysis has been developed for the wake configuration, forces and moments on airfoils.
