... Model Test is a key part of the entire ship design process. The interaction between the propulsor and the hull in these tests is expressed in terms of standard coefficients and forms an important design aspect which affects the final performance of the vessel. Even though these coefficients give...

... noise impeller suction head propulsor crp propeller Forward-Skew-Bladed Ducted Propellers Neal A. Brown (M) ABSTRACT Propeller cavitation, with all its noise, vibration, erosion, etc. is largely the consequence of blade lift fluctuations when operating in non-uniform inflow. It is easily shown...

... angle strength hydrofoil front hydrofoil wake geometry prediction experiment boundary condition rotor stator interaction bem model propeller interaction propulsor fluent A Method for the Prediction of Rotor/Stator InteractionApplications to 2-D Hydrofoils and Propeller Lei He (SM)1...

... propulsors and the drag force on the pod and duct surfaces. The time averaged propeller force distributions are considered as source terms (body force) in the momentum equations of NS-3X and FLUENT. The effects of viscosity on the effective wake and on the performance of the propeller blade, as well...

... This paper presents the results of an experimental study on the effects of propeller hub angle and azimuth conditions on the propulsive characteristics of puller podded propulsors in open water conditions. The propulsive performance of two model puller-podded units with different propeller hub...

... and strut are assessed, and the results of the involved methods are validated with those measured in experiments. reservoir simulation upstream oil & gas marine transportation strut body force type podded propulsor convergence total velocity proceedings mpuf-3a boundary podded propulsor...

... Potential propulsors for current applications may vary in complexity from traditional open propellers to podded propulsors, multiple blade-row ducted units, and waterjets. In the past, the lifting-line theory has been an effective tool in establishing the principal characteristics of an optimum...

... strut strength propeller wake calculation velocity component rudder prediction pressure distribution proceedings coefficient velocity field algorithm arrangement integral equation propeller propulsor modified trailing edge Numerical Analysis of Podded and Steering Systems Using...

... solver ducted propeller inflow propeller interaction propulsor gbflow Modeling of Contra-Rotating and Ducted Propellers via Coupling of a Vortex-Lattice with a Finite Volume Method Hua Gu (SM) and Spyros A. Kinnas (M) Ocean Engineering Group, The University of Texas at Austin ABSTRACT This paper...

... This paper presents a thorough analysis of the optimal ideal propulsor (OJP) theory. A significantly improved solution is obtained for the classical problem formulated by W.J.M Rankine. For instance, the uniform distribution of the axial induced velocity in the far propulsor wake is shown...

... A technique for the analysis of propulsor-induced maneuvering forces on the surface and underwater vehicles has been developed. The method is capable of modeling general propulsors but is especially suited to complex integrated propulsors and their highly contracting stern flows. Integrated...

... the blade surfaces under most operating conditions. A VW can be used for high-speed vessels where traditional propulsors fail to perform due to cavitation limitations. It also can address some of the shortcomings typical of super cavitating or partially submerged propellers. The 24" water tunnel...

... The ring propulsor concept employs a permanent magnet motor located in a nozzle, and a ring fastened to the propeller tips. Blades are driven by the rotating ring which plays role of the electric motor rotor. This kind of shaftless propulsor, sometimes called Ring Propeller or Integrated Motor...

... This paper presents the hydrodynamic design procedure for multi-stage blade-row marine propulsors using the original authors' model of the vortex wake. The special attention is paid to optimization algorithms that solve the problems about optimum spanwise circulation distribution and optimum...

... Contemporary propulsors in tubes (waterjets, nozzles, side thrusters) are relatively cumbersome and definitely stem from simpler unshrouded installations. For shrouded installations, tip-driving is almost a natural solution. Although a novel concept, Mechanical Tip-Driven Propulsor (MTDP...

... An integrated propulsor has a strong interaction with the flow over the stem and prevents that flow from separating as it would in the absence of the propulsor. Traditional propulsor design procedures based upon interaction coefficients are inadequate for this type of application. A logical...

... A special procedure is presented to account for the influence of the flow through the tip gap of a ducted propulsor when the analysis of the ducted propulsor is performed using a boundary element method. Boundary element methods or panel methods have achieved a high /eve/ of refinement over...

... A navel postswirl propulsor designed for a small vehicle is addressed The major benefit of this design is the simplicity of the machinery arrangement. The challenge of this design is the low value of Reynolds number which may cause flow separation on the propulsor blade surfaces. Open-water...

... A method is presented for the three-dimensional inverse design of single or multi-blade row ducted propulsor blades for a specified blade circulation in axisymmetric inlet shear flow conditions. The method computes the flow through the duct and the propulsor blades simultaneously...

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