... rotating blade row plus a stator; a rotating blade set consisting ofmain blades and splitter blades, plus a stator; and two co-rotating blade rows (an inducer and a kicker) plus a stator. In the second step of the design process, the single rotor/stator concept was optimized to maximize the efficiency...

... Eckhard Praefke, Associate Member No. 21 ABSTRACr The subject of this paper is the design of contra-rotating propellers and a stator-rotor canbinatian for a fictitious application. The load distributions have not always been selected opthnurn due to different reasons which are explained. Four different...

... Procedures for the design, analysis, and model tests of a preswirl stator-propeller system for a 300,000 DWT VLCC are described Five stators were designed and tested using the existing propeller for a 300,000 DWT VLCC in order to verify the effectiveness of the stator-propeller system. Maximum...

... applications. In order to realize some of the advantages of CR propellers, without the mechanical complexity, a novel postswirl (PS) propulsor was designed for a small vehicle in the current study. A PS propulsor consists of a forward rotor and aft stator vanes. PS propulsors exihibit many advantages in terms...

...THE SOCIETY OF NAVAL ARCHITECTS AND MARINE ENGINEERS 601 PAVONIA AVENUE, JERSEY CITY, NJ 07306 Paper lo be presented al !he PropellerS/Shaft,ng ·91 Symposium Virginia Beach, Virginia. September 17-18. 1991 . Pre-swirl Stator and Propeller/Stator Efficiency M.M. Gaafary, Associate Member and M.M...

... A systematic procedure for the design of a class of marine propulsors is described. This class of propulsors includes traditional propellers, ducted propellers, contra-rotating propellers, vane-wheel propulsors, and propellers operating with pre-or post-swirl stators. The topic of optimum...

...THE SOCIETY OF NAVAL ARCHITECTS AND MARINE ENGINEERS 601 PAVONIA AVENUE, JERSEY CITY, NJ 07306 Paper to be presented at the Propellers/Shafting '91 Symposium Virginia Beach, Virginia, September 17-18, 1991. An Analysis Method for a Ducted Propeller with Pre-Swirl Stator Blades Michael J. Hughes...

... of the counterrotating machinery. The favorable effect of tangential velocity cancellation achieved by a counterrotating propeller system can be realized without counterrotating machinery by placing upstream of a propeller a stator that generates tangential velocities which are exactly canceled out by the propeller...

... A theoretical method for determining optimum circulation distributions for propeller/stator combinations and determining the circumferential variation in circulation for non-axisymmetric stators is presented. Comparisons of theoretical predictions and water tunnel measurements are given...