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Keywords: propeller
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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
..., UAV propulsion, industrial and agricultural pumping, and medical devices. Prototypes and testing have been pursued at MARIN, Netherlands, and Swedish laboratories. reservoir surveillance application propeller momentum united states government production monitoring propulsion dijana basta...
Proceedings Papers
Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-012
... tests and full-scale Computational Fluid Dynamics (CFD) simulations, are compared for a bulk carrier with an open Controllable Pitch Propeller (CPP) and a general cargo vessel with a ducted CPP. Both approaches are compared to ballast sea trial data and it is shown that the two methods can lead...
Proceedings Papers
Paper presented at the SNAME Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-013
... important insight for the designers about the overall performance of the propulsor, however, it still lacks detailed information on the sources of these coefficients. The paper studies two design aspects namely the direction of rotation of propellers and the asymmetric strut of a Push-Pull CRP. The study...
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-2023-005
... When considering the propulsion performance of a ship, one of the most important factors is the propeller design. Generally, it has been known that propulsion efficiency is greater if a propeller has a larger diameter and low propeller shaft speed. However, it is equally important to maintain...
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 Propeller and Shafting Symposium, September 12–13, 2023
Paper Number: SNAME-PSS-2023-002
... This paper examines the effect of dynamic propeller loads on the axial location of the knuckle point in a double sloped aft sterntube bearing (ASTB), as found in a typical marine slow-speed direct drive diesel engine powertrain. The so-called double sloped geometry is formed inside a bearing...
Proceedings Papers
Paper presented at the SNAME 15th Propeller and Shafting Symposium, September 25–26, 2018
Paper Number: SNAME-PSS-2018-03
... Propeller and Propulsion System Optimization Tobias Huuva, Emil Cerdier, Simon Törnros, Olof Klerebrant Klasson1 1. Caterpillar Marine ABSTRACT Designing and optimizing a propulsion system is twofold. The first step is to choose the main components, such as engine ratings, engine types, propeller...
Proceedings Papers
Paper presented at the SNAME 15th Propeller and Shafting Symposium, September 25–26, 2018
Paper Number: SNAME-PSS-2018-07
... on ship owner’s experience. The time-dependent ship performance is an essential topic for ship owners because if they realize their current ship performance, they can implement something such as hull or propeller cleaning for their economical operation. This study is focused on the usage of noon report...
Proceedings Papers
Paper presented at the SNAME 15th Propeller and Shafting Symposium, September 25–26, 2018
Paper Number: SNAME-PSS-2018-11
... In the preliminary design of a propulsion unit the selection of propeller diameter is most commonly based on open water tests of systematic propeller series. The optimum diameter obtained from the propeller series data is however not considered to be representative for the operating conditions...
Proceedings Papers
Paper presented at the SNAME 14th Propeller and Shafting Symposium, September 15–16, 2015
Paper Number: SNAME-PSS-2015-002
... vibration calculation case-3 propeller propulsion calculation case-1 diagram stiffness knowledge management rotor whirling vibration vibration analysis equation whirling vibration analysis vibration whirling vibration calculation shaft matrix bearing resonance Since 1869...
Proceedings Papers
Paper presented at the SNAME 14th Propeller and Shafting Symposium, September 15–16, 2015
Paper Number: SNAME-PSS-2015-005
...Developed Blade Propeller Drawing for Raked Propellers Paul Rodgers Assistant Professor, UP Diliman, QC, Philippines A method is proposed for generating the developed blade drawing for raked propellers. Unlike Holst s Method1, which is valid only for propellers without rake, this method discusses...
Proceedings Papers
Paper presented at the SNAME 14th Propeller and Shafting Symposium, September 15–16, 2015
Paper Number: SNAME-PSS-2015-012
... Stern tube lubricants; used to lubricate the bearings that support the vessel propeller shaft in the stern tube, are continuously lost to the marine environment while the ship is moving under power. Although the specific amount of lubricant lost in a stern tube application is dependent...
Proceedings Papers
Paper presented at the SNAME 14th Propeller and Shafting Symposium, September 15–16, 2015
Paper Number: SNAME-PSS-2015-011
...INTRODUCTION Figure 1 - An example of a casting mold, with the propeller pattern sitting inside the mold cavity. The manufacturing of large marine propellers is a highly specialized trade that incorporates many different disciplines of In the production of a typical propeller, the starting point...
Proceedings Papers
Paper presented at the SNAME 14th Propeller and Shafting Symposium, September 15–16, 2015
Paper Number: SNAME-PSS-2015-004
... With the aid of detailed numerical flow simulations it has become possible to determine the isolated propeller blade load during a revolution. The load fluctuation on a single propeller blade can be clearly related to the inflow velocity field. Once the time dependent load, and consequently...
Proceedings Papers
Paper presented at the SNAME 14th Propeller and Shafting Symposium, September 15–16, 2015
Paper Number: SNAME-PSS-2015-001
... to capture dynamic loads on the propeller shaft of azimuthing propulsors, in order to support the industry in studying various phenomena and understanding the physics. These measuring systems are designed so carefully that the hydrodynamic loads can be measured reliably and accurately to a high frequency...
Proceedings Papers
Paper presented at the SNAME 13th Propeller and Shafting Symposium, September 11–12, 2012
Paper Number: SNAME-PSS-2012-007
... and appropriateness in the various vessel missions. The main focus, because most of the authors’ experience has been in design and manufacture of commercial marine propellers and nozzles, will be on propeller driven vessels. The paper will address, somewhat, various vessel design features and specific details which...
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-2012-009
... In recent years, a number of propeller designs have been developed that aim to reduce the resistive characteristics of sailboat propellers when not in use. One of the more common of these designs is the feathering-blade propeller. Feathering propellers accomplish this decrease in resistance...
Proceedings Papers
A Method for the Prediction of Rotor/Stator Interaction Applications to 2-D Hydrofoils and Propeller
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...
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