Large-scale vortex-lattice model for the locally separated flow overwings

The flowfield over wings with controlled separation was studied by applying a modified vortex-lattice model. Viscous effects were accounted for by vortex-ring modeling of the cellular shapes observed above separated, unswept leading-edge wings. The separation line location for the considered cases was known from experiments; this determined the location of the separated vortex rings and enabled the prediction of wing loading by means of potential theory. Presented calculated results are in agreement with experimental wind tunnel data.