Computations of self-propulsion free to sink and trim and of motions in head waves of the KRISO Container Ship (KCS) model

Carrica, Pablo M.; Fu, Haohuan; Stern, Frederick

doi:10.1016/j.apor.2011.07.003

Cited by 56 publications

(20 citation statements)

References 7 publications

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“…Case 6, according to the work by Carrica et al (2011), exhibits a very linear behaviour since the wavelength is very large. It can hence be regarded as the most linear condition amongst all of the cases.…”

Section: Ship Geometry and Conditionsmentioning

confidence: 96%

“…In addition, during this literature review, it was seen that when using the KCS model, although resistance predictions have been conducted for a range of Froude numbers (for example Banks et al, 2010 andEnger et al, 2010), seakeeping analyses have only been performed at forward speeds corresponding to a Froude number of 0.26 or higher (for example Simonsen et al, 2013 andCarrica et al, 2011). This study therefore may be useful to understand the seakeeping behaviour and performance of the KCS model at a slow steaming speed.…”

Section: Introductionmentioning

confidence: 98%

“…Following this, Carrica et al (2011) presented two computations of KCS in model scale, utilising CFDShip-Iowa, which is a general-purpose CFD simulation software developed at the University of Iowa. They performed self-propulsion free to sink and trim simulations in calm water, followed by pitch and heave simulations in regular head waves, covering three conditions at two different Froude numbers (Fn ¼0.26 and 0.33).…”

Section: Introductionmentioning

confidence: 99%

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Full-scale unsteady RANS CFD simulations of ship behaviour and performance in head seas due to slow steaming

et al. 2015

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It is critical to be able to estimate a ship׳s response to waves, since the resulting added resistance and loss of speed may cause delays or course alterations, with consequent financial repercussions. Slow steaming has recently become a popular approach for commercial vessels, as a way of reducing fuel consumption, and therefore operating costs, in the current economic and regulatory climate. Traditional methods for the study of ship motions are based on potential flow theory and cannot incorporate viscous effects. Fortunately, unsteady Reynolds-Averaged Navier–Stokes computations are capable of incorporating both viscous and rotational effects in the flow and free surface waves. The key objective of this study is to perform a fully nonlinear unsteady RANS simulation to predict the ship motions and added resistance of a full scale KRISO Container Ship model, and to estimate the increase in effective power and fuel consumption due to its operation in waves. The analyses are performed at design and slow steaming speeds, covering a range of regular head waves, using a commercial RANS solver. The results are validated against available experimental data and are found to be in good agreement with the experiments. Also, the results are compared to those from potential theory

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Section: Ship Geometry and Conditionsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Full-scale unsteady RANS CFD simulations of ship behaviour and performance in head seas due to slow steaming

et al. 2015

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“…In the case of predicting ship wave loads with interface-capturing methods, several previous studies have contributed to this task, e.g. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Even if such studies already exist, it is difficult to reach general conclusions on the validity of these methods.…”

Section: Introductionmentioning

confidence: 99%

Computational and experimental study on local ship loads in short and steep waves

2013

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Currently, little information exists on the validity of interface-capturing methods in predicting local ship wave loads in short and steep waves. This study compares computational and experimental results in such a case (kA = 0.24, L wave /L ship = 0.16). The results allow the variation of wave loading between ten locations in the bow area of the ship to be observed. The computations were performed with an unstructured RANS solver that models free-surface flows with a volume-of-fluid method. In the model tests, the wave loads were measured with pressure sensors. The analysis of the results focuses on the wave conditions and on the pressure histories of the local wave loads. The computational and experimental results are in good qualitative agreement and encourage the further use of the computational results.

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“…A mismatching hub can decrease the propulsive efficiency and cavitation performance significantly. In recent years, computational fluid dynamics (CFD) techniques have been employed more and more extensively for analyzing the performance of hydrodynamic systems (Carlton, Radosavljevic, & Whitworth, 2009;Carrica, Fu, & Stern, 2011;Dubbioso, Muscari, & Mascio, 2014;Lam, Hamill, & Robinson, 2013;Lam, Robinson, Hamill, & Johnston, 2012;Shamsi, Ghassemi, Molyneux, & Liu, 2014), designing propeller ESDs (Çelik, 2007;Lee, Bae, Kim, & Hoshino, 2014;Park, Jung, & Kim, 2005) and simulating the cavitation (Rafael et al, 2015;Singhal, Athavale, Li, & Jiang, 2002;Watanabe, Kawamura, Yoshihisa, Maeda, & Rhee, 2003;Zhu & Fang, 2012). The International Towing Tank Conference (ITTC) discussed applications of the CFD method to calculating the hydrodynamic performance of propellers and believed that it could be used to obtain the open-water performance and pressure distribution of a propeller accurately (Salvatore, Streckwal, & Terwisga, 2009).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analyses of the hydrodynamic performance of propeller boss cap fins in a propeller-rudder system

Sun

Wang³

et al. 2016

Engineering Applications of Computational Fluid Mechanics

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This paper presents the simulated and experimental results of propeller-rudder systems with propeller boss cap fins (PBCFs) and analyzes the hydrodynamic performance of PBCFs in propellerrudder systems. The purpose is to study the impact of PBCFs on the hydrodynamic performance of rudders. Hydrodynamic experiments were carried out on propeller-rudder systems with PBCFs in a cavitation tunnel. The experimental energy-saving effect of the PBCF without a rudder was 1.47% at the design advance coefficient J = 0.8. The numerical simulation was based on the Navier-Stokes equations solved with a sliding mesh and the SST (Shear Stress Transfer) k-ω turbulence model. After the grid independence analysis, the flow fields of an open-water propeller with and without a PBCF were compared, then the efficiencies of the propulsion systems including different rudders and the thrust coefficient K r of rudders were analyzed. The results indicate that the installation of a PBCF increases the resistance of the rudder, which results in a reduction in the energy-saving effect of the PBCF. At the design advance coefficient, the energy-saving effect of the PBCF with an ordinary rudder and a twisted rudder decreases from 1.47% to 1.08% and 1.16%, respectively; thus, it is important to factor in the rudder of a propulsion system when evaluating the energy-saving effects of PBCFs . ARTICLE HISTORY

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Computations of self-propulsion free to sink and trim and of motions in head waves of the KRISO Container Ship (KCS) model

Cited by 56 publications

References 7 publications

Full-scale unsteady RANS CFD simulations of ship behaviour and performance in head seas due to slow steaming

Full-scale unsteady RANS CFD simulations of ship behaviour and performance in head seas due to slow steaming

Computational and experimental study on local ship loads in short and steep waves

Experimental and numerical analyses of the hydrodynamic performance of propeller boss cap fins in a propeller-rudder system

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