... 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...

... adsorption of the power at a range of speeds and usually even reverse. With a fixed PROPULSOR OPTIONS: pitch propeller, the target loading speed is usually set Choices of propulsors which may be appropriate according to the worst loading condition of the vessel in its usual service, considering heaviest...

... 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...

... upstream oil & gas mpuf-3a aft propeller euler solver interaction circulation kinna fore propeller inflow gbflow euler equation symposium solver propeller effective wake coefficient loading ducted propeller propulsor Modeling of Contra-Rotating and Ducted Propellers via...

... 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...

... can be obtained with about 10% of the computational work of a completely rigorous theory. Fig. 1 Completely Rigorous Panel Model Used by Kerwin et al [l] it prevents the flow going around the blade tip from the pressure side of the blade to the suction side of the blade. This allows the loading...

... 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...

...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. Propeller Hydrodynamic Loads and Blade Stresses and Deflections During Backing and Crashback...

... 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...

... to main deck, DH Draft, design full load (mean), Draft Draft Trim, bdtaerlsiliaaglsnt(fm(uemlaelna)nl,o)a,TmdTm(down by Tm stern) Trim, trial full load (down by bow) Trim, ballast (down by stern) Displacement, design full load, A(SW) Displacement, trial full load, A(SW) Displacement, ballast, A(SW) Block...

...THE SOCIETY OF NAVAL ARCHITECTS AND MARINE ENGINEERS One World Trade Center; Suite 1369, New York, N.Y. 10048 Paper to bl!I preoorrled at !he Propeliara '81 Symposium, Vlr!llnle. Beach, Virginia, Mey 26--27, 1981 'Periodi Blade Loads on Propellers in . Tangential and Longitudinal Wake$ No. 11...