Partial cavitation is a highly effective drag reduction technique that has been successfully applied to shipbuilding for three decades. Partial cavities, however, are sensitive to variations in ship speed and perturbations from the incoming flow. Because of this, a successful design requires profound hydrodynamic knowledge and preliminary mathematical analysis.It is necessary to design some hydrodynamic locks to stabilize the cavity under perturbations. The traditional path has been to put the cavities into specially designed niches, but this passive flow control technique does not make it possible to achieve maximum drag reduction and cannot be optimal for all ship hull shapes. Active flow control can give more flexibility to the hydrodynamic locks. As a result, it will be possible to obtain greater drag reduction and have no losses for cavitation-free motion of the ships. The mathematical fundamentals of active flow control for cavitating bodies/hydrofoil are described in this paper. The detailed development of the numerical technique on the basis of these fundamentals must be fitted to the actual projects.
Partial cavitation as drag reduction technique and problem of active flow control
Partielle Kavitation als Methode der Widerstandsverringerung und das Problem der aktiven Strömungssteuerung
Marine Technology and Sname News ; 40 , 3 ; 181-188
2003
8 Seiten, 17 Bilder, 1 Tabelle, 28 Quellen
Aufsatz (Zeitschrift)
Englisch
Partial Cavitation as Drag Reduction Technique and Problem of Active Flow Control
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