The Experts below are selected from a list of 189 Experts worldwide ranked by ideXlab platform
L Luznik - One of the best experts on this subject based on the ideXlab platform.
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UNCERTAINTY ANALYSIS IN PROPELLER Open Water TestS
International shipbuilding progress, 1996Co-Authors: Neil Bose, L LuznikAbstract:An uncertainty analysis for a propeller Open Water Test is described. The method used follows that of the American National Standards Institute (ANSI) and American Society of Mechanical Engineers (ASME) standard on Measurement uncertainty, adopted by these two bodies in 1985 and 1986 respectively, and the approach described by Coleman and Steele in their 1989 book Experimentation and uncertainty analysis for engineers. The uncertainty analysis was done to identify which sources of error had the most influence on the total uncertainty in the measurements as well as to ascertain the overall level of uncertainty in the measurements during these Tests. The aim was to use the results to reduce future uncertainty levels in doing these Tests and to provide a starting point or guide for uncertainty analysis in similar Tests at other Testing facilities.
Shaobo Kang - One of the best experts on this subject based on the ideXlab platform.
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Simulation and analysis of ship electrical propulsion system in waves
2011 IEEE International Conference on Mechatronics and Automation, 2011Co-Authors: Yaohua Luo, Jiang You, Shaobo KangAbstract:For safe and cost effective operations, high performance vessel electrical propulsion systems are needed. However, limited attention has earlier been given to the effects of the propulsion system dynamics in waves. A propeller Open Water Test has been finished to study the propeller characteristic in waves. A model of ship motion considered regular waves is introduced and the inverter-motor-drive system based on rotor magnetic field vector control is studied. Simulation results show the interaction between ship, inverter-motor-drive system and the propeller. The model presented can predict load variations of vessel electrical propulsion systems in waves.
Neil Bose - One of the best experts on this subject based on the ideXlab platform.
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Reliability assessment of ship powering performance extrapolations using Monte Carlo methods
2013Co-Authors: Im Kamal, Binns, Neil Bose, Giles ThomasAbstract:This paper describes the application of a practical method for uncertainty analysis, in which the uncertainties in all error sources are considered individually and simultaneously in the extrapolation of ship powering prediction. Such uncertainty has been investigated by utilising the JTTCl 978 performance prediction method and an application of Monte Carlo simulations. The error sources are: the torque, thrust, towing force, propeller revolution from the self-propulsion Test; the resistance force and the model speed from the resistance Test; and the torque and thrust coefficient from the Open Water Test. A case study was conducted using available sea trials and towing tank experimental data of the RTV Bluefin, a research and training vessel owned and operated by the Australian Maritime College (AMC), see Table 1 for main particulars. The levels of uncertainty in ship powering were obtained by choosing a random sample from the error sources and repeating the calculation a large number of times. Then the distributions of the simulation results were used to determine the uncertainty in the total result.
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UNCERTAINTY ANALYSIS IN PROPELLER Open Water TestS
International shipbuilding progress, 1996Co-Authors: Neil Bose, L LuznikAbstract:An uncertainty analysis for a propeller Open Water Test is described. The method used follows that of the American National Standards Institute (ANSI) and American Society of Mechanical Engineers (ASME) standard on Measurement uncertainty, adopted by these two bodies in 1985 and 1986 respectively, and the approach described by Coleman and Steele in their 1989 book Experimentation and uncertainty analysis for engineers. The uncertainty analysis was done to identify which sources of error had the most influence on the total uncertainty in the measurements as well as to ascertain the overall level of uncertainty in the measurements during these Tests. The aim was to use the results to reduce future uncertainty levels in doing these Tests and to provide a starting point or guide for uncertainty analysis in similar Tests at other Testing facilities.
Moustafa Abdelmaksoud - One of the best experts on this subject based on the ideXlab platform.
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numerical analysis of ducted propeller performance under Open Water Test condition
Journal of Marine Science and Technology, 2013Co-Authors: Martin Greve, Markus Druckenbrod, Moustafa AbdelmaksoudAbstract:This paper investigates the Open Water performance of the Ka-series propellers at various pitch and expanded area ratios in combination with the 19A duct by employing the panel method panMARE and the RANSE code ANSYS-CFX. An efficient method, Caly, is developed in order to generate the 3D-geometry and the surface numerical grid of the ducted propellers. Caly can be coupled with ANSYS-TurboGrid to automatically produce 3D-grids for the RANSE solver. The numerical results are compared with published experimental data and the flow details are concluded and compared. The influences that the grid resolution, the panel arrangements of duct and blade, and the flow in gap between inside wall of the duct and blade tip on the numerical results are studied. Grids verification, turbulence model dependency analysis and Reynolds number scantling are also discussed.
Yaohua Luo - One of the best experts on this subject based on the ideXlab platform.
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Simulation and analysis of ship electrical propulsion system in waves
2011 IEEE International Conference on Mechatronics and Automation, 2011Co-Authors: Yaohua Luo, Jiang You, Shaobo KangAbstract:For safe and cost effective operations, high performance vessel electrical propulsion systems are needed. However, limited attention has earlier been given to the effects of the propulsion system dynamics in waves. A propeller Open Water Test has been finished to study the propeller characteristic in waves. A model of ship motion considered regular waves is introduced and the inverter-motor-drive system based on rotor magnetic field vector control is studied. Simulation results show the interaction between ship, inverter-motor-drive system and the propeller. The model presented can predict load variations of vessel electrical propulsion systems in waves.
