This paper presents the results of hydrofoil simulations at varying depths below the free surface, in surface piercing conditions, and integrated with ship hulls. It focuses on the influence of the free surface on the hydrodynamic loads, susceptibility to cavitation, and resulting surface wave patterns. A fast, high-order, NURBS (Non Uniform Rational B-Spline) based boundary element method has been developed that includes both free surface boundary conditions and steady and unsteady iterative pressure Kutta conditions for simulating lift. Results from this method will be compared to published experimental results, analytical solutions based on linear potential theory, and numerical results from viscous simulations obtained using the commercial CFD solver, ANSYS CFX.

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