... Inlet Velocity Chord Renolds Number ( ) Flow Velocity Normal to Chord-Line (Fig 1) Boundary-Layer Thickness Local Reynolds Number ( ) Circulation Laminar Dynamic Viscosity Geometric Variables Turbulent Eddy Viscosity Chord (Fig 1) Specific Dissipation Rate Gap Size (Fig 1) Volume Fraction Span (Fig 1...

... representation of the total flow field initially developed in the Marine Hydrodynamics Laboratory at MIT starting in the early 1990's. production monitoring ka-455 rotor pbd-14 axisymmetric solver tangential component circulation radial distribution normal velocity grid ocean engineering...

.... efficiency prediction pitch change propeller blade deflection cavitation performance rigid propeller uniform flow circulation distribution circulation wake screen mean load flexible propeller geometry propeller geometry flow field deflection composite propeller no-load geometry Design...

... of propulsor performance. efficiency swirl field quantity radial distribution coefficient lifting line circumferential mean circulation thrust coefficient quantity grid circulation distribution solver propeller blade row contour duct streamtube propulsor The Preliminary Design...

... the unknown doublet strength. This Modified Trailing Edge (MTE) is also used as a tool for the approximate accounting for viscous and related effects on circulation. The integrated propulsive/steering system is simulated within the potential frameworks using the velocity field iterations method and quasi...

... 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...

... inception inception speed circulation efficiency coefficient propeller design propeller frv-40 cavitation inception speed tip vortex cavitation requirement reynolds number calculation vortex cavitation geometry cavitation thrust Quiet Propeller Design for a Fisheries Research Vessel Thad...

..., including ducted propulsors. These methods have difficulty, however, directly representing the flow through the gap region between the tip ofthe propeller and the duct, which can significantly affect the prediction ofthe overall circulation andforces on both the duct and propeller. The method presented...

... of the blade-rows. The important results of a given Body control points \. Ufting.[lnestages - CC00-0X"-Oio - ~i.l.o.o.o.lJ. t:. IJ. t. A A r. A l>. ad A .ti t:.ArC.l>.Al4llDucl . . . '' \: Ody 60tlfC8 rings . i · . design with this tool are the duct shape and orien· Bow tation, the distribution of circulation...

... thrust coefficient = T / ( p/8 .- R' V g non-dimensional vortex sheet strength, 2 1r VJ G non-dimensional circulation, r/(2 ,r R V,> g, axial vortex sheet strength g, circumferential vortex sheet strength Ko KT prop torque coefficient = Q / ( p n' D') prop thrust coefficient = T / ( p n' D') K,. nozzle...

.... 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...

... frequency x,r, y cylindrical coordinates of field poi nt xo,ro. ifo - cy l indrical coordinates of loading point z - number of stator or pro- peller blades ~ (rl angle of attack ,.B (rl r <r) - hydrodynamic pitch angle - circulation density of Scxi blade section Dirac delta function of argument x tr71...

... sheet naval architect transient maneuvering process circulation time step velocity field control point ship speed pavonia avenue jersey city coefficient propeller vortex segment vorticity propeller characteristic maneuvering process equation THE SOCIETY OF NAVAL ARCHITECTS AND MARINE...

... A theoretical method for determining optimum circulation distributions for propeller/stator combinations and determining the circumferential variation in circulation for non-axisymmetric stators is presented. Comparisons of theoretical predictions and water tunnel measurements are given...

... This paper sets forth recent developments in the design theory for contrarotating propellers. The analysis includes a more accurate solution for the optimum circulation distribution than has been previously formulated, it includes prediction of slipstream contraction for the first time...

... A numerical approach to determine the optimum circulation distribution of a propeller inside a given duct 18 presented. The propeller blades are modelled by lifting lines. The duct is represented in non-linear theory by using a potential based panel method. The propeller lifting lines...

... induced velocity ci ut = tangential induced velocity v UA+un ) 2+(oor-ut ) 2 ) 112 w(r)= wake fraction ci blade element angle of incidence angle of advance hydrodynamic angle of advance circulation R u111iTJ U jc1-w(r)) dT/P (propeller efficiency) ~dCT/dCP(sectional efficiency) ·S hydr~dynamic advance...

...-dimensional circulation per blade advance coefficient= vJ!(nD) thrust coefficient= T/(sn2n4) torque coefficient= Qn2n5 ) length of ship camber ratio n speed of rotation pitch ratio, pressure cavitation pressure effective power delivered power torque r non-dimensional radius non-dimensional hub radius...