Modeling of hard-chine hulls in transitional and early planing regimes by hydrodynamic point sources

Article type: Research Article

Authors: Matveev, Konstantin I. | Ockfen, Alex E.

Affiliations: School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, USA

Note: [] Corresponding author: Konstantin I. Matveev, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA. Tel.: +1 509 335 1327; Fax: +1 509 335 4662; E-mail: [email protected].

Abstract: A linear potential-flow method based on hydrodynamic point sources is developed for modeling steady hydrodynamics of hard-chine hulls. Source singularities are distributed on the wetted hull surface and on the free water surface. The wetted hull area is not known in advance and is found iteratively. The outcome of the model is the pressure distribution on the hull and the water surface elevations. Validation studies with two- and three-dimensional hull forms demonstrate good agreement for the lift coefficient and center of pressure in transitional and early planing regimes. The near-field wake wash reasonably agree with empirical data for wave profiles behind a planing plate and for the trough position behind a submerged hydrofoil. The flexibility of the current method allows modeling of a variety of hull forms and systems with hydrodynamically interacting elements.

Keywords: Planing hull, hydrofoil, CFD, hydrodynamic lift, wake wash

DOI: 10.3233/ISP-2009-0052

Journal: International Shipbuilding Progress, vol. 56, no. 1-2, pp. 1-13, 2009