... critical in Push-Pull CRP and hold a significant impact on the loading of the pair of propellers. The choice of direction of rotation of propellers is also quite important to ensure a favourable inflow condition to the strut and the load distribution on propellers. The impact of both these aspects...

... and cladding metal, reducing the potential for corrosion pits to initiate fatigue cracks and dramatically slowing crack growth rates. At a heavy loading of 110% of the 23284A steel yield stress and with 0.020 inch deep pits, laser peening increased fatigue life of the steel by 1370% and by 350...

... propeller thrust marine transportation efficiency available power loading rpm boat thickness rudder consideration blade area nozzle open propeller modification diameter manufacturer blade tip Practical Considerations for Optimization of Propulsion Efficiency in Commercial Vessels Cliff...

... design features, as well as test results, are presented. seal assembly labyrinth seal procedure gearbox lip seal upstream oil & gas hydroload seal application seal ring loading completion installation and operations oil leakage clearance device circumferential seal shaft...

... in opposite directions, can be designed so that the total swirl downstream is cancelled. CRPs are also torque balanced, which is important for vessels which need accurate positioning. In the case of ducted propellers the advantages are attributed to the presence of the duct. For heavy loaded propellers...

... model is hosed on the classic moderately loaded propeller lifting line model. This model is modified in order to take into account new boundary conditions for the radial circulation distribution and nozzle surface effect on the induction factors. The lifting surface model also includes new features...

..., the methods are tentative as they form proposals for standards. The proposals include both steady and unsteady loading components arising from ice and hydrodynamic loads and the structural response in the form of direct stresses, fatigue loadings and existing residual stresses. Exceptional loads arising from...

... between the -propeller blade tip and the surface of the duct. This allows the loading to be carried up to the tip of the blade rather tlian falling to zero, by restricting the flow from going around the blade tip from the pressure side to the suction side as would occur on an open propeller. The flow near...

... procedure cavitation side cavitation prediction cavitation inception reduction propeller calculation pressure distribution camber distribution loading bladed propeller variation geometry camber erosion PROPELLER DESIGN AND EVALUATION FOR A HIGH SPEED PATROL BOAT INCORPORATING ITERATIVE...

... are presented. variation duct influence function propeller circulation computational band rotation angle inflow maneuvering force strength vortice loading coordinate system ducted propulsor propulsor artificial intelligence rotor geometry ducted propeller blade tip THE SOCIETY...

... is accounted/or through modifying their inflow velocity field. strength wake sheet incidence loading reservoir characterization rudder lifting surface geometry information rudder incidence upstream oil & gas vector panel method propeller coordinate system prediction coefficient...

... and is therefore capable of modelling the strong interactions between the blades and the duct. vorticity flow field duct ducted propulsor design method blade surface variation plane propeller equation thickness pressure distribution loading blade row blade shape boundary condition geometry...

... An efficient and user-friendly analysis package (approach) has been developed to assess commercial skewed propeller loading and blade stresses and deflections during steady backing and crashback operations. Predictions of backing and crashback pressure distributions on blade surfaces...

... The paper describes, with examples, the use of lifting surface analysis and finite element stressing procedures to investigate the deflections of propeller blades under load and the influence of these deflections on the performance of the propeller. propeller calculation equality...

... for a given propeller operating behind an axisymmetric and a non-axismmetric stator. Theoretical comparisons are made between a hypothetical propeller designed to operate without a stator, and optimum propeller/stator design. This comparison includes predictions of efficiency, unsteady loading and cavitation...

... sspa publication efficiency ducted propeller europe government camber influence goteborg 1967 duct thrust coefficient astern application reduction coefficient loading bollard gilbert dyne THE SOCIET6Y01OPPFaapeNVvriortAgoinnVbiiaeAaBpLreAeasvAcehneR,tenVidCrugaHietn!iI,ahTe...

..., and it includes faster and more accurate methods of computing the mutual interactions between the forward and aft propeller. The addition, the theory has been extended to allow for finite loading at the blade roots and takes into account the effect of the hub boundary. The paper provides numerical predictions...

... and maneuvering in heavy in second year and multi-year ice, from August 27, 1986 to September 13, 1986. The successful execution of the project resulted in a detail measurement of the forces on the intermediate shaft bearings and the stern tube bearings due to dynamic ice loads generated at the propeller...

..., this leads to behavior which is difficult to interpret and with unknown consequences for the detailed lift contribution. calculation operation loading interpretation skew propeller propeller revolution requirement camber yamasaki coefficient torque astern operation strength calculation...

... supporting the use of this basic theoretical method for prediction and design guidance purposes related to unsteady cavitating propeller excitation problems. information experiment investigation loading cavity cavitation procedure fin hull naval architect propeller amplitude agreement...