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Keywords: prediction
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Proceedings Papers

Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-012
... In the design process of a new vessel, ship speed-power predictions provide designers valuable insight regarding the expected performance of the vessel with respect to the contractual speed requirements. In this study, two different methods for acquiring this speed-power prediction, being model...
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 13th Propeller and Shafting Symposium, September 11–12, 2012
Paper Number: SNAME-PSS-2012-004
.... Finally, the predictions of the hydrodynamic performance for the water-jet pump and the inducer from the present method are validated against existing experimental data or numerical results from RANS solvers. reservoir surveillance simulation performance prediction production monitoring water...
Proceedings Papers

Paper presented at the SNAME 12th Propeller and Shafting Symposium, September 15–16, 2009
Paper Number: SNAME-PSS-2009-07
... This paper presents computational techniques to predict the fully unsteady interaction of two hydrofoils (rotor and stator) and to calculate the unsteady trailing wake geometry in the case of a propeller. A boundary element method is developed to simulate the unsteady performance of moving...
Proceedings Papers

Paper presented at the SNAME 12th Propeller and Shafting Symposium, September 15–16, 2009
Paper Number: SNAME-PSS-2009-03
.... The design process used a number of design and analysis tools to develop a propulsor intended to operate at 39 knots while avoiding thrust breakdown. The propulsor geometry was manufactured and tested in open water at two different scales and used in powering and cavitation tests. Software predictions...
Proceedings Papers

Paper presented at the SNAME 12th Propeller and Shafting Symposium, September 15–16, 2009
Paper Number: SNAME-PSS-2009-01
...A Hybrid Viscous/Potential Flow Method for the Prediction of the Performance of Podded and Ducted Propellers Spyros A. Kinnas (M), Shu-Hao Chang, Yi-Hsiang Yu, Lei He (SM) Ocean Engineering Group, Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin...
Proceedings Papers

Paper presented at the SNAME 12th Propeller and Shafting Symposium, September 15–16, 2009
Paper Number: SNAME-PSS-2009-06
... Measurements of Controllable Pitch Propeller Blade Loads in Turns Stuart D. Jessup (FL), Martin Donnelly (V), David Fry (V), Ali Etebari (V), Josh Burton (V), Jessica Jacobson (V) ABSTRACT To improve the prediction of the alternating blade loading under ship turning conditions, a test...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-07
... characteristics of composites can also be exploited to improve the hydrodynamic performance by automatically adjusting the shape of the blade. The objective of this work is to develop a numerical tool to predict the hydroelastic response of composite marine propellers. This is achieved by coupling a 3-D boundary...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-03
... dependence of cavity solution, propeller forces and hull pressure fluctuations are performed in the case of single propellers. The effects of the presence of tunnel wall or free surface on the predicted pressure fluctuations on the hull are also investigated. The method is then extended to the case of twin...
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-2003-12
... upstream oil & gas propeller wake prediction velocity field circulation calculation pressure distribution algorithm reservoir simulation strength rudder coefficient propulsor integral equation strut propeller velocity component proceedings arrangement modified trailing...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-04
...Numerical Analysis of Surface-Piercing Propellers Yin Lu Young1 and Spyros A. Kinnas2 ABSTRACT A 3-D low-order boundary element method, PROPCAV, has been extended to predict unsteady hydrodynamic forces and ventilation patterns on a surface-piercing propeller. The negative image method is used...
Proceedings Papers

Paper presented at the SNAME 9th Propeller and Shafting Symposium, September 20–21, 2000
Paper Number: SNAME-PSS-2000-07
... A 9-D low-order boundary element method, PROPCAV, has been developed in the past for the prediction of unsteady sheet cavitation on fully submerged propellers subjected to non axisymmetric inflows. The objective of this research is to extend PROPCAV to predict the performance of surface-piercing...
Proceedings Papers

Paper presented at the SNAME 9th Propeller and Shafting Symposium, September 20–21, 2000
Paper Number: SNAME-PSS-2000-12
... prediction model propeller propeller freight & logistics services pressure pulse design draft cavitation propeller-induced hull pressure pulse marine transportation efficiency vibration level ship model vibration excitation revolution hull pressure pulse propeller design sea margin...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-12
... correlation data variation coefficient propeller pitch roughness model test data procedure us government correlation allowance prediction ship trial ship data spot delta ca pitch propeller propeller rpm The US. Navy is in the process of reexamining the ship model powering...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-11
... procedure cavitation side cavitation prediction cavitation inception reduction propeller calculation pressure distribution camber distribution loading bladed propeller variation geometry camber erosion PROPELLER DESIGN AND EVALUATION FOR A HIGH SPEED PATROL BOAT INCORPORATING ITERATIVE...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-01
... power: up to 16000 BKW In this presentation some operational experience will be discussed. Due to the relative short time available it will be concentrated to the following items: accuracy of power predictions, achieved efficiencies, vibration levels and harbour manouevering. POWER PREDICTIONS .To make...
Proceedings Papers

Paper presented at the SNAME 7th Propeller and Shafting Symposium, September 20–21, 1994
Paper Number: SNAME-PSS-1994-011
.... A statistical fit of the parameters determining the wake behind the propeller was made to be able to predict the performance of fixed- and controllable pitch propellers, both in design and off-design condition (including pitch deflection) within an acceptable level. With this lifting surface tool it is not only...
Proceedings Papers

Paper presented at the SNAME 7th Propeller and Shafting Symposium, September 20–21, 1994
Paper Number: SNAME-PSS-1994-005
... This paper is presented as a precursor of a SNAME, M20 Ship Machinery Vibration Guideline for predicting the lateral shaft vibration amplitudes and forces on single and multiple screw ships. Comments from the attendees of the Symposium are sought to take this as useful as possible...
Proceedings Papers

Paper presented at the SNAME 7th Propeller and Shafting Symposium, September 20–21, 1994
Paper Number: SNAME-PSS-1994-001
... and self-propulsion experimental results show that the performance predictions agree well with the measurements. ps propulsor design rotor postswirl propulsor stator circulation distribution interaction coefficient propulsor design torque small vehicle reynolds number efficiency diameter...

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