This paper develops a 2D steady flow hydrodynamic analysis model for dual foils via potential theory-coupled boundary element method. Each foil embeds a vortex sheet to achieve required circulations, with the total potential split into incoming flow potential, source-induced disturbed potential, and vortex sheet-driven disturbed potential. In conjunction with two auxiliary equations obtained from the Kutta condition at each foil's trailing edge, the boundary integral equation is incorporated into a unified numerical matrix; these equations are solved simultaneously to determine both the potential distribution on the foils and the vortex strengths. Comprehensive convergence analyses have been carried out, while the interaction effects between the two foils are discussed in detail. Additionally, the hydrodynamic performances of foils equipped with slats or flaps are also presented.
Huang et al. (Sun,) studied this question.