.... A ducted propeller usually overcome by introducing RANS solvers. However, a consists of a rotating propeller and a non-rotating full-scale RANS modeling of both the propeller and the nozzle/duct. The presence of the duct accelerates the duct is not only computationally expensive for inflow velocity...

... cavitation inflow Design and Testing of a Hybrid Shaft-Pod Propulsor for a High Speed Sealift Ship Scott D. Black (AM) and Dominic S. Cusanelli (M) ABSTRACT The hybrid shaft-pod contra-rotating propulsor configuration has been demonstrated to offer increased efficiency and maneuvering performance over...

... production control blade geometry iteration solver propeller blade row reservoir surveillance tangential velocity waterjet inflow control point Improved Algorithms for the Design/Analysis ofMultiComponent Complex Propulsors Justin E. Kerwin, (FL) Professor of Naval Architecture, Emeritus, MIT...

... by subtracting from the total inflow (determined in GBFLOW-3D) the velocities induced by the same propeller ( determined in MPUF-3A). Several iterations between GBFLOW-3D and MPUF-3A are performed until convergence is reached. The three-way interaction among the pod/strut and the two propellers is fully...

... ship hull coefficient boundary layer propeller calculation ran mpuf3a calculation cavitation chen interaction mpuf3a calculation scale case full scale case aft propeller inflow torque coefficient effective wake ship research mau propeller fore propeller propeller disk...

... 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...

... A fully three-dimensional unsteady Euler solver, based on a finite volume approach and the pressure-correction method, is developed and applied to the prediction of the effective wake for propellers subject to non-axisymmetric inflows. The method is coupled with an existing vortex lattice method...

...PROPELLER WAKE ALIGNMENT MODELS IN UNIFORM AND INCLINED INFLOW Spyros A. Kinnas; (AM) and Sangwoo Pyo~ (SM) ABSTRACT Various wake alignment techniques which have been developed in the past for the analysis of non-cavitating propellers in uniform inflows are reviewed and some of them are extended...

... and ducted marine propulsors. The analysis technique includes a treatment of contracted streamtube geometries and blade thickness-load corrections. This analysis procedure was developed to function either with an input effective inflow or coupled with an axisymmetric viscous flow solver. Sample analysis...

.... Pressure on the hydrofoil. Velocity induced by the tunnel. Flux though the tunnel. Distance between field point and source point. Propeller radius. Inflow boundary. Outflow boundary. Hydrofoil surface. Propeller boundary and trailing wake surface. Tunnel boundary surface, ST = Swall + S,n + Bout Solid...

... a primed global coordinate system (x' ,y' ,z') attached to and moving with the ship. This is the standard coordinate system used in previous MIT-developed computer codes, which are used in the work described in Sections 3 and 7. The propulsor inflow velocities are i UP 8' position of key blade fP angular...

.... effective inflow iteration boundary layer inflow ran calculation boundary condition velocity field body force model propeller circulation flow field computation turbulence model propeller model upstream oil & gas calculation coefficient ran code grid equation THE SOCIETY OF NAVAL...

... field pressure Ap(xo,ro) - pressure jump across stator blade rh - hub radius R Descartes distance s = stator blade span U(r) - ship speed or free stream velocity U,V,W - induced axial, tangential and radial velocity com- ponents (V(rl \. - wake complex amplitude components of order ~ w - inflow...

.... united states government stator geometry circulation efficiency coefficient propeller vortex inflow loading vortice strength non-axisymmetric stator architect and marine enginee 601 plane propulsor cavitation procedure hub vortex experiment THE SOCIETY OF NA~AL ARCHITECTS AND MARINE...