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Keywords: cavitation
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Proceedings Papers

Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-004
... Major sources of noise radiated by a ship to the oceans are briefly reviewed, focusing on the underwater noise radiated by the propeller caused by cavitating and non cavitating phenomena. Sheet cavitation and especially tip vortex cavitation are the most frequently first types of cavitation...
Proceedings Papers

Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-006
... The performance of a representative 2D propeller section was investigated in rectilinear flow to determine the impact of small in-tolerance leading-edge defects on cavitation. A DTMB Mod NACA-66 blade section with 4% thickness and 1.4% camber was taken as representative of a blade section where...
Proceedings Papers

Paper presented at the SNAME 15th Propeller and Shafting Symposium, September 25–26, 2018
Paper Number: SNAME-PSS-2018-03
... and optimization approach to vessel machinery design. constraint efficiency machinery installation cavitation tradeoff optimization problem side cavitation manual design requirement propeller artificial intelligence pressure side cavitation equipment selection propeller design operational...
Proceedings Papers

Paper presented at the SNAME 13th Propeller and Shafting Symposium, September 11–12, 2012
Paper Number: SNAME-PSS-2012-006
... A commercial URANS solver is used to analyze the cavitating flow field around a rectangular, cantilevered hydrofoil with a small gap between the free end and the wall of a cavitation tunnel. A transport-equation based cavitation model is used along with an artificial compressibility correction...
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-2009-04
... Propeller cavitation, with all its noise, vibration, erosion, etc. is largely the consequence of blade lift fluctuations when operating in non-uniform inflow. It is easily shown, on the basis of simple low-aspect-ratio approximations, that forward-skew reduces the lift/incidence slope...
Proceedings Papers

Paper presented at the SNAME 12th Propeller and Shafting Symposium, September 15–16, 2009
Paper Number: SNAME-PSS-2009-02
.... The objective function can include not only global characteristics such as efficiency and thrust, but also sheet cavitation extension and volume. The prediction of the propeller hydrodynamic characteristics is made by a panel method developed by the authors and validated in several occasions, applicable to open...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-07
... Warfare Center, Carderock Division (NSWCCD). marine transportation prediction nswccd kinna element method marine engineer cavitation naval architect propeller artificial intelligence propeller blade proceedings propeller 5479 lin frequency blade deformation abaqus hydroelastic...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-10
... sections that have the efficiency characteristics of conventional submerged sub-cavitating propellers at low and inte1mediate speeds but can transition to the super-cavitating mode for highspeed operation without encountering thrust breakdown. pressure surface knot condition pressure distribution...
Proceedings Papers

Paper presented at the SNAME 11th Propeller and Shafting Symposium, September 12–13, 2006
Paper Number: SNAME-PSS-2006-02
... In the present study an experimental analysis of the propeller-rudder interaction has been performed in a cavitation tunnel. The experiments simulated the condition of a rudder operation aft of a propeller but without the influence of the hull. The activity has been performed through...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-05
... Various computational methods that have been developed in the past are combined in this paper to predict: (a) the performance of podded propulsors, and (b) the sheet cavitation on a rudder which is subject to the flow of an upstream propeller. An 3-D Euler-based finite volume method (GBFLOW-3D...
Proceedings Papers

Paper presented at the SNAME 10th Propeller and Shafting Symposium, September 17–18, 2003
Paper Number: SNAME-PSS-2003-15
... environment. These methods include a Reynolds-Averaged Navier-Stokes (RANS) code for ship turbulent flow calculations and a Vortex-Lattice Method (VLM) basedprogram MPUF3Afor sheet cavitating propellerflow analyses. The combination of these methods provides a new level of realism for modeling the flow field...
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-2000-01
... In modern ship design problems related to cavitation can be solved successfully by properly designing the surfaces of propeller blades, rudders, shaft struts, etc. When the cavitation is of a limited nature, optimization of the geometry with respect to the inception of cavitation can lead...
Proceedings Papers

Paper presented at the SNAME 9th Propeller and Shafting Symposium, September 20–21, 2000
Paper Number: SNAME-PSS-2000-13
... is propelled by a single propeller operating in the wake of a skeg. The radiated noise goal required the propeller to be capable of operating cavitation free at a speed of at least 11 knots. The propeller was also required to meet ABS ice class CO. Afive-bladed, frxed-pitch propeller was designed to meet...
Proceedings Papers

Paper presented at the SNAME 9th Propeller and Shafting Symposium, September 20–21, 2000
Paper Number: SNAME-PSS-2000-12
... in the accommodation areas), propeller design considerations, and test results (powering performance, cavitation performance, and vibration excitation) with three different model propellers. The authors also present the full-scale sea trial results as far as they are available. propeller self propulsion test...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-27
... Two parameters can be fixed during the cavitation experiments: cavitation number and Strauhal number. However, scale effects should be taken into account for marine propeller blades in the wake of a ship's hull. Flexural vibration of the blades in an unsteady flow cause changes in the pressure...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-14
... in industry, as well as a new performance model that can be used in propeller calculations. curvature propeller manufacturer dawson propeller deformation small propeller cup effective pitch diameter cavitation geometric pitch proposed geometry standard cupped propeller macpherson...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-11
... A fixed pitch propeller design was developed for a high speed patrol boat. The primary design goals were to maintain speed at increased displacement, reduce cavitation thrust breakdown, reduce cavitation noise, and eliminate cavitation erosion. Special attention was paid to the suppression...
Proceedings Papers

Paper presented at the SNAME 8th Propeller and Shafting Symposium, September 23–24, 1997
Paper Number: SNAME-PSS-1997-24
... This report contains the description of a propeller design procedure incorporating the design of new blade profile sections. The aim was to optimize the propeller's cavitation behavior and to lower the propeller-induced vibration excitation in the ship's aftbody without sacrificing...

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