Scaling of wetted-transom resistance for improved full-scale ship performance predictions

Korkmaz, Kadir Burak; Werner, Sofia; Bensow, Rickard

doi:10.1016/j.oceaneng.2022.112590

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…In addition, the ship analysed in this work has a bulbous bow and stern, which may affect the applicability of Prohaska's method. These factors increase the uncertainties associated with low-speed drag measurements and low Reynolds number flow phenomena [21,22].…”

Section: Experimental Form Factor Determinationmentioning

confidence: 99%

Investigating Fishing Vessel Hydrodynamics by Using EFD and CFD Tools, with Focus on Total Ship Resistance and Its Components

Oyuela,

Ojeda,

Arribas

et al. 2024

JMSE

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The aim of this work is to gain a better understanding of the hydrodynamics of a typical Argentinian fishing vessel in calm water. It is focused on the evaluation of total ship resistance and its components for different draughts. The 1978 ITTC Power Prediction method is used to predict total ship resistance from experiments carried out at the University of Buenos Aires towing tank. To conduct a more detailed evaluation of the flow around this hull, numerical studies at model scale are carried out with the open-source code OpenFOAM V10 and validated against experimental results. The Reynolds-Averaged Navier–Stokes (RANS) method together with Volume of Fluid (VOF) are used for the numerical procedure. The validated CFD model not only can provide more detailed information about the ship’s hydrodynamics than the EFD results but also allows for the exploration of the improvement in ship power prediction by using combined CFD-EFD methodologies. This work numerically calculates the form factor by using a double-body configuration and discusses the possibility of combining EFD results with this CFD form factor in order to improve total force prediction for this kind of ships.

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Section: Experimental Form Factor Determinationmentioning

confidence: 99%

Investigating Fishing Vessel Hydrodynamics by Using EFD and CFD Tools, with Focus on Total Ship Resistance and Its Components

Oyuela,

Ojeda,

Arribas

et al. 2024

JMSE

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show abstract

“…Every vessel is optimized for a number of conditions (even keel at full load and design speed, ballast condition, etc. ), but the actual operating conditions usually differ from the expected ones [21]. It was confirmed in [22] that trim can affect the total resistance of a ship for various service speeds and the optimum trim for every speed is different.…”

Section: Introductionmentioning

confidence: 99%

CFD-Powered Ship Trim Optimization: Integrating ANN for User-Friendly Software Tool Development

Vasilev,

Kalajdžić,

Ivković

2024

Preprint

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This study presents a comprehensive approach to trim optimization as a energy efficiency improvement measure, focusing on reducing fuel consumption for one RO-RO car carrier. Utilizing Computational Fluid Dynamics (CFD) software, the methodology incorporates Artificial Neural Networks (ANN) to develop a mathematical model for estimating key parameters such as brake power, daily fuel oil consumption (DFOC) and propeller speed. The complex ANN model is then integrated into a user-friendly software tool for practical engineering applications. The research outlines a seven-phase trim optimization process and discusses its potential extension to other types of ships, aiming to establish a universal methodology for CFD-based engineering analyses. Based on trim optimization results, the biggest DFOC goes up to 10.5% at 7.5m draft and up to 8% for higher drafts. Generally, in every considered case, it is recommended to sail with the trim towards the bow, meaning that the ship’s weight (ballast) should be adjusted to tilt slightly forward.

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Drag decomposition and realistic prediction of transom-stern monohull ships

Ma,

Guang,

et al. 2023

Ocean Engineering

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Scaling of wetted-transom resistance for improved full-scale ship performance predictions

Cited by 6 publications

References 22 publications

Investigating Fishing Vessel Hydrodynamics by Using EFD and CFD Tools, with Focus on Total Ship Resistance and Its Components

Investigating Fishing Vessel Hydrodynamics by Using EFD and CFD Tools, with Focus on Total Ship Resistance and Its Components

CFD-Powered Ship Trim Optimization: Integrating ANN for User-Friendly Software Tool Development

Drag decomposition and realistic prediction of transom-stern monohull ships

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