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Keywords: duct
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Proceedings Papers

Paper presented at the SNAME 13th Propeller and Shafting Symposium, September 11–12, 2012
Paper Number: SNAME-PSS-2012-005
... This paper presents the analysis of the performance for various ducted propellers using a hybrid numerical method, which couples a vortex lattice method (VLM) for the analysis of propellers and a Reynolds-Averaged Navier-Stokes solver for the prediction of the viscous fluid flow around the duct...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-02
... 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 Potential propulsors for current...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-13
... on the hydrodynamic aspects of the thruster design. A standard duct and section shape were modified to give bi-directionality, which does not give optimum performance. The second phase ofthe project is to optimise the hydrodynamic performance of the integrated thruster. The hydrodynamic analysis of the thruster...
Proceedings Papers

Paper presented at the SNAME 9th Propeller and Shafting Symposium, September 20–21, 2000
Paper Number: SNAME-PSS-2000-11
... of a VW were identified in the 24" water tunnel tests. The results indicate that a VW could have better-powering performance over a wider speed range as compared with either super cavitating or surface-piercing propellers. sigma 0 efficiency coefficient duct cavity ventilated waterjet torque...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-17
... boundaiy condition gap solution propeller propulsor propeller blade coefficient the foil potential flow solution circulation duct loading infinite wall blade tip gap model gap panel discharge coefficient clearance region clearance flow A special procedure is presented...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-02
... This paper describes a potential-based panel method formulated for the prediction of the steady performance of a waterjet propulsor. The method employs normal dipoles and sources distributed on the solid surfaces such as the impeller/stator blades, hub and duct, and normal dipoles in the shed...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-21
.... Since propellers are designed to operate in the circumferential mean inflow at the propeller plane, all flow field computations are currently done using axisymmetric viscous flow solvers. This methodology can be applied lo both axisymmetric and three-dimensional afterbodies. A ducted preswirl integmted...
Proceedings Papers

Paper presented at the SNAME 7th Propeller and Shafting Symposium, September 20–21, 1994
Paper Number: SNAME-PSS-1994-008
... Several computational approximations for the hydrodynamic design and analysis of ducted propellers are developed, with the objective of capturing the important flow physics of ducted units within computer codes suitable for preliminary design use. Applications to both steady and unsteady flow...
Proceedings Papers

Paper presented at the SNAME 7th Propeller and Shafting Symposium, September 20–21, 1994
Paper Number: SNAME-PSS-1994-007
... 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...
Proceedings Papers

Paper presented at the SNAME 6th Propeller and Shafting Symposium, September 17–18, 1991
Paper Number: SNAME-PSS-1991-16
...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. Energy Saving Device-A Research for Production of Rudder-Ball and Wake Equalizing Ducts Din...
Proceedings Papers

Paper presented at the SNAME 6th Propeller and Shafting Symposium, September 17–18, 1991
Paper Number: SNAME-PSS-1991-07
... A systematic procedure for the design of a class of marine propulsors is described. This class of propulsors includes traditional propellers, ducted propellers, contra-rotating propellers, vane-wheel propulsors, and propellers operating with pre-or post-swirl stators. The topic of optimum...
Proceedings Papers

Paper presented at the SNAME 6th Propeller and Shafting Symposium, September 17–18, 1991
Paper Number: SNAME-PSS-1991-15
...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. An Analysis Method for a Ducted Propeller with Pre-Swirl Stator Blades Michael J. Hughes...
Proceedings Papers

Paper presented at the SNAME 6th Propeller and Shafting Symposium, September 17–18, 1991
Paper Number: SNAME-PSS-1991-14
... The design of a ducted propeller operating behind a body of revolution is a complex problem which requires design iterations in order to achieve suitable self-propelled conditions. The interaction of stern and propulsor cannot be handled in a traditional way for the case of a very full afterbody...
Proceedings Papers

Paper presented at the SNAME Propellers '88 Symposium, September 20–21, 1988
Paper Number: SNAME-PSS-1988-01
... 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...
Proceedings Papers

Paper presented at the SNAME Propellers '78 Symposium, May 24–25, 1978
Paper Number: SNAME-PSS-1978-011
... The unsteady lifting surface theory has been utilized in the study of the hydrodynamic interaction of a propeller and enshrouding nozzle when both lifting surfaces are immersed in a non-uniform inf low field (hull wake). The actual geometry of propeller and enshrouding duct, including...
Proceedings Papers

Paper presented at the SNAME Propellers '78 Symposium, May 24–25, 1978
Paper Number: SNAME-PSS-1978-002
... The paper presents an outline of a new theoretical method for the calculation of the off-design performance characteristics of ducted propellers. The model for the duct performance calculation is an advanced non-linear model based on surface vorticity distribution techniques. The propeller model...

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