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Keywords: efficiency
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Proceedings Papers

Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-007
... Recent research in the possible applications of the vortex propulsor – Vor-Prop - have included open cylinder model, a shafted coaming contained compact model and a double counter rotational internal turbine model. CFD analysis indicates efficiencies in applications including ship propulsion...
Proceedings Papers

Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-013
... on the design of propellers cannot always be determined by propulsive coefficients measured at model tests and needs a detailed CFD analysis. united states government simulation option influence push-pull contra-rotating propulsor marine transportation propulsor rotation efficiency ran solver...
Proceedings Papers

Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-004
... in propeller design. cavitation requirement variation circulation propeller cavitation inception diagram notation propulsion united states government marine transportation noise vortex cavitation noise propeller camber wakefield thickness efficiency Propeller and Shafting Symposium...
Proceedings Papers

Paper presented at the SNAME 15th Propeller and Shafting Symposium, September 25–26, 2018
Paper Number: SNAME-PSS-2018-10
... a more fuel-efficient ship operation at lower cost. In addition, since the start of the EEDI regulations, the shipyard has begun to focus on the further development of high performance ships. In such a background, many ship designers and manufacturers developed a variety of products such as the propeller...
Proceedings Papers

Paper presented at the SNAME 15th Propeller and Shafting Symposium, September 25–26, 2018
Paper Number: SNAME-PSS-2018-03
... efficient low-fidelity tool, based on speed are examples of this. For today s common the Boundary Element Method (BEM). After the vessel types, it is found that this design criterion often optimization, the propellers of interest are analyzed defines the entire equipment selection and at the same using...
Proceedings Papers

Paper presented at the SNAME 15th Propeller and Shafting Symposium, September 25–26, 2018
Paper Number: SNAME-PSS-2018-07
..., propeller revolution and fuel oil consumption, ship sea trial data and propeller performance, can be evaluated ship performance during ship in service. The analyzed output data can be produced as increasing of ship resistance (delta Rw) versus ship performance efficiency, fuel oil consumption (ton per day...
Proceedings Papers

Paper presented at the SNAME 14th Propeller and Shafting Symposium, September 15–16, 2015
Paper Number: SNAME-PSS-2015-004
... geometry revolution efficiency ship condition load fluctuation fluid dynamics calculation model scale wake field propeller full scale reservoir simulation fluctuation blade load fluctuation water performance transient blade load determination Transient blade load determination in behind...
Proceedings Papers

Paper presented at the SNAME 13th Propeller and Shafting Symposium, September 11–12, 2012
Paper Number: SNAME-PSS-2012-007
... In this paper the focus is not regarding any one particular type of vessel, but is to call attention to the various vessel and propulsor features which affect the propulsive efficiency of most any vessel. There is also some consideration of the various propulsor types and their effectiveness...
Proceedings Papers

Paper presented at the SNAME 13th Propeller and Shafting Symposium, September 11–12, 2012
Paper Number: SNAME-PSS-2012-009
.... For this paper, performance comparisons were carried out between a two-blade, 12-inch diameter feathering propeller and standard Wageningen B-Series propeller data in an effort to quantify the difference in propulsive efficiency. These tests included a series of open-water propeller tests conducted in Webb...
Proceedings Papers

Paper presented at the SNAME 12th Propeller and Shafting Symposium, September 15–16, 2009
Paper Number: SNAME-PSS-2009-17
.... Pod propulsion offers benefits like increased efficiency, better performance, nimble handling, and low noise levels while allowing more people to successfully operate their vessel due to a friendly operator interface. Features of these commercial pod systems that also benefit builders include ease...
Proceedings Papers

Paper presented at the SNAME 12th Propeller and Shafting Symposium, September 15–16, 2009
Paper Number: SNAME-PSS-2009-05
... were made for each pair of propellers tested to determine the level of manufacturing consistency as well as the effects of cupping. Test data for peak open-water efficiency and four-quadrant performance were compared to B-Series propeller data to determine whether the B-Series can be used confidently...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-10
... As surface ships are required to achieve higher speeds to meet their mission requirements, many still have intermediate speed endurance requirements that necessitate higher efficiency than some high-speed propulsor options con provide. This effort looks into developing propellers with blade...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-06
... accurately be assessed by model tests. production control open propeller experiment application propeller production monitoring efficiency model experiment actuator disk nozzle scale effect ducted propeller system coefficient oosterveld reynolds number thrust reservoir surveillance...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-09
... efficiency azimuth condition different azimuth condition hub angle Study of Puller Podded Propulsors with Tapered Hub Propellers in Straight Course and Azimuthing Conditions Mohammed Fakhrul Islam Faculty of Engineering and Applied Science, Memorial University ofNewfoundland St. John's, NL, AIB 3X5...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-08
.... 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...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-11
.... As a result, the upper boundary of efficiency is estimated for the isolated propulsor with a non-expansible wake. The obtained estimation is used for a number of practical examples, where the more complicated mathematical models are employed. Theoretical Estimation of the Upper Efficiency Boundary...
Proceedings Papers

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

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-20
... efficiency and hull-propeller interaction, is not the best assessment of non-traditionalpropulsion systems. A new proposed measure of merit ca/led the Hydrodynamic system coefficient is presented It is the ratio ofthe "bare hull" effective power to the final deliveredpower. Bare hull in this case refers...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-07
... rotating blade row plus a stator; a rotating blade set consisting ofmain blades and splitter blades, plus a stator; and two co-rotating blade rows (an inducer and a kicker) plus a stator. In the second step of the design process, the single rotor/stator concept was optimized to maximize the efficiency...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-18
... coefficient. ¢ = V, IU, And jet velocity ratio JVR0 = V7 IV,. Here V, is the average axial velocity at the pump inlet, U, is the tip tangential speed, and V7 is the average velocity in the discharge jet. Results from the design point performance program showed that the best efficiency would be achieved at JVR...

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