Medium-speed catamarans are under development as a new class of vessels to meet requirements for highly efficient sea transportation with low environmental impact. Reduced service speed and increased deadweight will increase transport efficiency. Compared to current high-speed catamarans, these new vessels will operate in a transitional speed range between high-speed craft and conventional displacement ships. In this paper, design guidelines to choose appropriate main dimensions for medium speed catamarans with minimum resistance were derived and a preliminary design was made. These vessels will operate at Froude numbers of about 0 .35 and have a relatively low prismatic coefficient of about 0 .5 in conjunction with a small transom immersion. Different methods are discussed to correctly predict the calm water resistance, with RANSE (Reynolds-averaged Navier-Stokes equations)-based flow simulations being the most promising. It is shown that they are capable of predicting the hydrodynamic characteristics of medium-speed catamarans, such as drag force, trim and sinkage with acceptable accuracy.
A practical design approach including resistance predictions for medium-speed catamarans
Ein praktisches, die Widerstandprognose einschließendes, Entwurfsverfahren für mittelschnelle Katamarane
Ship Technology Research / Schiffstechnik ; 60 , 1 ; 4-12
2013
9 Seiten, 10 Bilder, 2 Tabellen
Aufsatz (Zeitschrift)
Englisch
Katamaran , Entwurfsverfahren , Schiffsentwurf , hydrodynamische Eigenschaft , Widerstandsrechnung , Schiffswiderstand , Reynolds-Gleichung , Navier-Stokes-Gleichung , numerische Strömungssimulation , Trimm , Froude-Zahl , Abmessung (Auslegung) , umweltfreundliche Konstruktion , Umweltverträglichkeit
A Practical Design Approach including Resistance Predictions for Medium-speed Catamarans
Online Contents | 2013
|A Practical Design Approach including Resistance Predictions for Medium-speed Catamarans
Taylor & Francis Verlag | 2013
|Calm Water Powering Predictions for High-Speed Catamarans
British Library Conference Proceedings | 1997
|Database Design for High Speed Catamarans
British Library Conference Proceedings | 1995
|Online Contents | 1995