Full scale self-propulsion computations using discretized propeller for the KRISO container ship KCS

► Self-propulsion computations of a surface ship using discretized propeller in full scale are presented for the first time. ► Computations involve overset grids and autopilot to determine the self-propulsion point and are resource intensive. ►All propulsion factors are obtained numerically by compu...

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Vydané v:Computers & fluids Ročník 51; číslo 1; s. 35 - 47
Hlavní autori: Castro, Alejandro M., Carrica, Pablo M., Stern, Frederick
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Kidlington Elsevier Ltd 15.12.2011
Elsevier
Predmet:
Applied fluid mechanics
Applied sciences
CFD
Computation
Computational fluid dynamics
Computational methods in fluid dynamics
Computer simulation
Containers
Discretization
Exact sciences and technology
Fluid dynamics
Free surface flows
Full scale ship
Fundamental areas of phenomenology (including applications)
Ground, air and sea transportation, marine construction
Hydrodynamics, hydraulics, hydrostatics
Marine construction
Mathematical models
Overset grids
Physics
Propellers
Rotational
Self-propulsion
CFD
Overset grids
Propellers
Self-propulsion
Full scale ship
Free surface flows
Computational fluid dynamics
Container ship
Digital simulation
Thrusters
Free surface flow
Hydrodynamics
Modelling
Screw propeller
Mesh generation
ISSN:0045-7930, 1879-0747
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Popis
Shrnutí:► Self-propulsion computations of a surface ship using discretized propeller in full scale are presented for the first time. ► Computations involve overset grids and autopilot to determine the self-propulsion point and are resource intensive. ►All propulsion factors are obtained numerically by computing the propeller curve, the towed and the self-propelled ships. ► The propeller operates more efficiently in full scale than in model scale with a 12% smaller torque coefficient. ► Blade loads fluctuations are smaller in full scale, with axial force and bending moment amplitudes 13% and 25.9% smaller. Self-propulsion computations of the KCS containership are performed in full-scale with direct discretization of the propeller. A dynamic overset approach is used, which allows for arbitrary rotational speed of the propeller during the computation. The self-propulsion point is obtained using a controller to modify the propeller RPS until the target speed is reached. To obtain propulsion coefficients the open-water curves of the propeller and a towed, unpropelled case are also computed. Together, these computations provide for a complete CFD prediction of self-propulsion factors at full scale. The main differences with a similar model scale simulation following the ITTC procedures are identified and reported. The effect of these differences in the propeller operation point and performance are thoroughly studied and discussed. It is concluded that for this case the propeller operates more efficiently in full scale and is subject to smaller load fluctuations.
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ISSN:0045-7930
1879-0747
DOI:10.1016/j.compfluid.2011.07.005