A vortex-lattice method is applied to planing hull forms. The geometry of the jet surfaces next to the wetted hull is estimated on the basis of the hull geometry while its sidewise extent has been found numerically applying a non-linear free-surface pressure condition in the jet region. The method is applied to practical hull forms with chines spray rails and with varying deadrise over the length of the boat. The deadrise variation has a large influence on lift and drag. For a design situation, where the total lift and centre of effort is given, the influence on the total drag is less due to change of the trim. Calculated results and experiments for resistance and trim agree well for high velocities.
Effects of geometry on the steady performance of planning hulls
Einfluß der geometrischen Form auf den dynamischen Auftrieb von Knickspant-Bootskörpern
Ship Technology Research / Schiffstechnik ; 50 , 2 ; 91-100
2003
10 Seiten, 14 Bilder, 2 Tabellen, 15 Quellen
Article (Journal)
English
Effects of Geometry on the Steady Performance of Planing Hulls
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