Effects of Geometry on the Steady Performance of Planing Hulls

M. K. Wagner, Poul Andersen

Research output: Contribution to journalJournal articleResearchpeer-review


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. Keywords: planing boat, vortex lattice, spray
Original languageEnglish
JournalShip Technology Research
Pages (from-to)91-100
Publication statusPublished - 2003

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