Boundary integral method for the computation of the potential flow about ship configurations with lift and free surface effects

Report (1985)
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Published Date

31-12-1985

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NLR-TR 85142 U

Abstract

A boundary integral or "panel" method is described for computing the threedimensional, steady state, potential flow about ship configurations with or without lifting surfaces in the presence of a free surface in an initially undisturbed sea. The low order method is characterized by a special modelling of the free surface boundary condition, by an iterative procedure for solving the resulting system of equations and by the possibility to perform calculations about configurations with lifting elements (rudders, hydrofoils, keels, stabilizing foils). A description of the method is given and results are presented of a limited convergence study which gives directives for the required extension of the free surface grid and for panel distributions on the configuration as well as the free surface. Several examples of application are shown, including both simple hull forms and complex (sailing) boat configurations. Division: Fluid