Part 2: Simulation methodology and numerical uncertainty for RANS-CFD for the hydrodynamics of wind-assisted ships operating at leeway angles

Kolk, N.J. van der; Akkerman, I.; Keuning, J A; Huijsmans, R.H.M.

doi:10.1016/j.oceaneng.2020.107024

Cited by 9 publications

(2 citation statements)

References 12 publications

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“…For this purpose, a closed-loop gain-shaping algorithm was adopted to solve the long delay time problem of large ship movement. In summary, the common methods for predicting the turning circle of a ship are the free self-sailing model testing method [24], computer numerical simulation method [25], and semi-empirical estimation method. Along with the development of computer technology, more and more numerical simulation methods have been extensively implemented in ship-turning-ability forecasting.…”

Section: Introductionmentioning

confidence: 99%

Refinement of Norrbin Model via Correlations between Dimensionless Cross-Flow Coefficient and Hydrodynamic Derivatives

Li,

Chen,

Yan

et al. 2024

JMSE

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To develop a simplified and highly accurate ship motion model, this study thoroughly investigated the relationship between the dimensionless cross-flow coefficient and the four hydrodynamic derivatives of the Norrbin model. Eight different types of ships were simulated to explore the impact of dimensionless cross-flow coefficients and individual hydrodynamic derivatives on the ship’s turning circle. A set of precise formulas is proposed to depict the interplay between these variables. The simulation outcomes indicate that the average deviation in the agreement between the turning circles produced by adjusting the dimensionless cross-flow coefficient and those predicted by modifying the four hydrodynamic derivatives was only 2.70%. Furthermore, the similarities between the two circles and the sea trail were significantly higher at 91.45% and 92.87% compared with the original Norrbin model’s accuracy of 78.12%. Adjusting the dimensionless cross-flow coefficients enabled the rapid identification of a curve that closely mirrored the sea trail. This research aimed to improve the accuracy of the Norrbin model and resolve issues related to determining the magnification of the hydrodynamic derivatives, laying a robust foundation for subsequent studies and applications in relevant domains.

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Section: Introductionmentioning

confidence: 99%

Refinement of Norrbin Model via Correlations between Dimensionless Cross-Flow Coefficient and Hydrodynamic Derivatives

Li,

Chen,

Yan

et al. 2024

JMSE

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“…In order to realise the utilisation of wind energy in ships, scholars have studied a variety of devices to capture wind energy. The mature wind energy utilisation devices mainly include: traditional sails, airfoil sails, kite sails and Flettner rotors [8][9][10]. The Flettner rotor is an effective device for capturing wind energy on ships [11,12].…”

Section: Introductionmentioning

confidence: 99%

Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect

Lin

Zhang

et al. 2022

Polish Maritime Research

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The purpose of this study is to explore the potentiality of wind propulsion on semi-submersible ships. A new type of Flettner rotor (two rotating cylinders) system installed on a semi-submersible ship is proposed. The structure and installation of two cylinders with a height of 20 m and a diameter of 14 m are introduced. The numerical simulation of the cylinder is carried out in Fluent software. The influence of apparent wind angle and spin ratio on the two cylinders are analysed, when the distance between two cylinders is 3D-13D (D is cylinder diameter). When the distance between two cylinders is 3D, the performance of the system increases with an increase in spin ratio. Moreover, the apparent wind angle also has an effect on the system performance. Specifically, the thrust contribution of the system at the apparent wind angle of 120° is the largest at the spin ratio of 3.0. The maximum thrust reaches 500 kN. When the spin ratio is 2.5 and the apparent wind angle is 120°, the maximum effective power of the system is 1734 kW. In addition, the influence of the two cylinders distance on system performance cannot be ignored. When the distance between the two cylinders is 7D and the spin ratio is 2.5, the effective power of the system reaches a maximum, which is 1932 kW.

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Characteristics of outdoor pollutants intrusion and ventilation control in sentry buildings with normal openings

et al. 2022

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Part 2: Simulation methodology and numerical uncertainty for RANS-CFD for the hydrodynamics of wind-assisted ships operating at leeway angles

Cited by 9 publications

References 12 publications

Refinement of Norrbin Model via Correlations between Dimensionless Cross-Flow Coefficient and Hydrodynamic Derivatives

Refinement of Norrbin Model via Correlations between Dimensionless Cross-Flow Coefficient and Hydrodynamic Derivatives

Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect

Characteristics of outdoor pollutants intrusion and ventilation control in sentry buildings with normal openings

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