This paper presents the results of a numerical performance analysis to demonstrate the worthiness of a recently patented new concept propulsor, the so-called thrust-balanced propeller (TBP). The main advantage of this unconventional propulsor ist it inherent ability to reduce the unsteady effect of blade forces and moments when it is operating in a non-uniform wake flow. The propulsor comprises a pair of diametrically opposed blades that are connected to one another and mounted so as to be rotatable together through a limited angle about their spindle axis. A quasi-hydrodynamic approach is described and applied to perform the numerical analysis using a state-of-the-art lifting surface procedure for conventional prropellers. Performance comparisons with a conventional fixed-pitch propeller are made for the blade forces and moments, efficiency, cavitation extents and fluctuating hull pressures. Bearing in mind the quasi-static nature of the analyses, the results present favourable performance characteristics for the thrust-balaced propeller and support worthiness of the concept. However the concept needs to be proved through physical model tests, which are planned to take in a cavitation tunnel.
Performance assessment of a concept propulsor: the thrust-balanced propeller
Leistungsbewertung des Konzeptes einer Propulsionsvorrichtung: Der Propeller mit Schubausgleich
Ocean Engineering ; 29 , 2 ; 129-149
2002
21 Seiten, 21 Bilder, 2 Tabellen, 12 Quellen
Aufsatz (Zeitschrift)
Englisch
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