... The performance of a representative 2D propeller section was investigated in rectilinear flow to determine the impact of small in-tolerance leading-edge defects on cavitation. A DTMB Mod NACA-66 blade section with 4% thickness and 1.4% camber was taken as representative of a blade section where...

.... upstream oil & gas resolution revolution propeller wake information flow field turbulence level plane angular resolution investigation procedure velocity field free stream velocity measurement plane symposium non uniform inflow propeller propeller wake analysis uniform inflow angular...

... objectives: 1) To find out if the inception of tip vortex cavitation could be delayed by applying leading-edge roughness or a bulb. 2)To explore the influence of Reynolds' number and gas content of the water on the inception of propeller tip vortex cavitation. Particularly when investigating the first...

.... The comparison of SIPUP’s at sea data and design predictions shows good agreement in both propulsive coefficient and vehicle speed. united states government propeller propulsor coefficient vehicle sisup requirement calculation stator ratio knot swirl inducing taor upstream investigation rpm...

.... propeller europe government calculation polynomial procedure coefficient cavitation efficiency accuracy cpdsy optimum propeller diameter comparison consideration evaluation cavitating screw propeller investigation result THE SOCIETY OF NAVAL ARCHITECTS AND MARINE ENGINEERS 601 Pavonia...

... In an experimental investigation in a cavitation tunnel blade force measurements, cavitation observations, and measurements of hull pressure fluctuations have been performed in 4 systematically-varied wake fields. The primary difference in the wake fields lies in the velocity gradients...

... supporting the use of this basic theoretical method for prediction and design guidance purposes related to unsteady cavitating propeller excitation problems. propeller cavitation information calculation amplitude procedure experiment centerline agreement fin investigation ratio phase hull...

... During more than 10 years propellers have been investigated by model tests in the SSPA large cavitation tunnel in which complete ship models can be mounted. This equipment made it possible to measure the pressure pulses on the hull induced by the cavitating propellers at correct geometric...

..., cavitation and noise aspects were investigated. Then a full scale optimization program was planned and carried out in order to ascertain the expected differences between model and full scale propellers behaviour. As a final step, the optimum full scale propeller was developed and submitted to a complete...

... hydrodynamics. A structural model of the blade is then used to perform the strength analysis. propeller metals & mining alloy alcunic 8 bronze loading investigation aluminum bronze information manganese specimen nickel aluminum bronze calculation naval architect type 5 strength world...

... ref ship propeller blade transaction investigation reference strength thickness vibration stress procedure frequency bradshaw loading engineering THE SOCIETY OF NAVAL ARCHITECTS AND MARINE ENGINEERS 74 Trinity Place, New York, N.Y. 10006 Pap er to b e presented at Propellers 75...

... Propeller strength analysis and prediction methods were investigated. The primary tool was the finite element technique. More specifically, the thins hell approximation was adopted and modeled by a commercially available (MARCCDC) program. To verify that the program was performing correctly...