Motion Prediction of Catamaran with a Semisubmersible Bow in Wave

Sun, Hanbing; Jing, Fengmei; Jiang, Yi; Zeng, Jin; Zhuang, Jian; Ma, Wenyong

doi:10.1515/pomr-2016-0006

Cited by 11 publications

(8 citation statements)

References 4 publications

(2 reference statements)

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“…The rigid motion approach causes difficulties for free surface refinement, especially in pitch, and deforming meshes may lead to cell quality problems. The authors of [23] showed that the overset grid method was more accurate in the prediction of the motion response of an SSB catamaran under regular wave conditions when heading in the wave. The overset region moves with the hull over a static background region.…”

Section: Fig 5 the Dimensions Of The Computational Domainmentioning

confidence: 99%

Numerical and Experimental Study on Seakeeping Performance of a High-Speed Trimaran with T-foil in Head Waves

2019

Polish Maritime Research

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The longitudinal motion characteristics of a slender trimaran equipped with and without a T-foil near the bow are investigated by experimental and numerical methods. Computational fluid dynamics ( CFD) method is used in this study. The seakeeping characteristics such as heave, pitch and vertical acceleration in head regular waves are analyzed in various wave conditions. Numerical simulations have been validated by comparisons with experimental tests. The influence of large wave amplitudes and size of T-foil on the longitudinal motion of trimaran are analyzed. The present systematic study demonstrates that the numerical results are in a reasonable agreement with the experimental data. The research implied that the longitudinal motion response values are greatly reduced with the use of T-foil.

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Section: Fig 5 the Dimensions Of The Computational Domainmentioning

confidence: 99%

Numerical and Experimental Study on Seakeeping Performance of a High-Speed Trimaran with T-foil in Head Waves

2019

Polish Maritime Research

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“…They pointed out that the RANS method gave higher accuracy compared other numerical calculations based on potential theory when accounting for the contribution of the stabilizing fins. Sun et al [17] calculated the seakeeping performance of a catamaran with a semi-submerged bow (SSB) in model scale adopting overset grid and motion region methods. Comparisons among available experimental data and numerical results illustrated that overset grid technology was more accurate than the motion region technology when calculating large ship motions.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on hydrodynamic coefficients and longitudinal motions of trimaran in head seas for various wave slopes

Zhang

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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In this study, numerical simulations for the prediction of hydrodynamic coefficients and longitudinal motions of a trimaran vehicle in regular head waves with varying wave slopes are presented for a wide range of wave conditions. Wave excitation and radiation terms in 2DOF equations of longitudinal motions of the ship in regular head seas are obtained, using an unsteady Reynolds averaged Navier-Stokes (URANS) solver based on finite volume method. A trimaran hull form is used for the calculations at a relative high Froude number of 0.628. Numerical simulations are performed for eight different regular wave conditions with varying wave slopes. Firstly, the verification study is performed to determine an optimal mesh system and time step for CFD simulations. Secondly, numerical simulations are carried out to predict hydrodynamic coefficients and longitudinal motion responses and the results are compared with those obtained from the fully URANS approach and experiments. Finally, the relationship between the hydrodynamic coefficients and longitudinal motions are investigated with varying wave slopes. Systematic studies of the numerical simulations demonstrate that the numerical results have a reasonable agreement with the experimental data. The nonlinearities effects of wave slopes on the hydrodynamic coefficients and vertical motion of the trimaran are studied and analyzed taking the viscous effect and free surface nonlinearities into consideration.

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“…Following the works of [12][13][14][15][16], the numerical methods are adopted to solve and analyze the fluid problem. The computational fluid dynamics (CFD) simulation are the best alternative with several advantages such as allow to simulate using actual and model geometry scale in extreme condition of the fluid flow and the CFD simulation also have a good agreement with experimental data [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Propeller Performance Using Computational Fluid Dynamics Approach

Adam

Fitriadhy

Kong

et al. 2019

EPI-IJE

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A reliable prediction approach to obtain a sufficient thrust and torque to propel the ship at desired forward speed is obviously required. To achieve this objective, the authors propose to predict the thrust coefficient (KT), torque coefficient (KQ) and efficiency (η) of the propeller in open-water model test condition using Computational Fluid Dynamics (CFD) simulation approach. The computational simulation presented in the various number of rotational speed (RPM) within the range of advance ratio J=0.1 up to 1.05. The higher value of J leads to a decrease in 10KQ and KT. While the η increased steadily at the lower value of J and decreased at the higher value of J. The results also showed that the propeller with 1048 rpm obtains a better efficiency at J=0.95 with η= 88.25%, 10KQ=0.1654 and KT= 0.0942. The computation result is very useful as preliminary data for propeller performance characteristics.

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Motion Prediction of Catamaran with a Semisubmersible Bow in Wave

Abstract: Compared with standard vessels, a slender catamaran with a semi-submerged bow (SSB

Cited by 11 publications

References 4 publications

Numerical and Experimental Study on Seakeeping Performance of a High-Speed Trimaran with T-foil in Head Waves

Numerical and Experimental Study on Seakeeping Performance of a High-Speed Trimaran with T-foil in Head Waves

Numerical study on hydrodynamic coefficients and longitudinal motions of trimaran in head seas for various wave slopes

Prediction of Propeller Performance Using Computational Fluid Dynamics Approach

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