Development of CFD tool for evaluating of seakeeping performance of a ship in waves using Eulerian scheme with Lagrangian particle

秀実, 陸田; 健治, 栗原; 剛幸, 黒川; Baso, Suandar; 康明, 土井; 建剛, 施

doi:10.2534/jjasnaoe.11.7

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…In this section, the numerical method which combines Eulerian scheme and Lagrangian particles by coupling SPH method and CIP method with particles are described concisely. More detail explanations were stated in our previous work 17) . Figure 1 shows the illustration of the Eulerian scheme with Lagrangian particles we have developed in our previous works 14) -17) .…”

Section: Methodsmentioning

confidence: 98%

Numerical Study on Propulsion and Seakeeping Performance of a Ship Using Eulerian Scheme with Lagrangian Particles

2011

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SummaryThe power required must be determined appropriately to tow a ship, and ship performance must be predicted realistically with respect to a ship safety in the sea. Consequently, developed CFD design tools and techniques for predicting a performance are necessary in ship design stage.In our previous researches, we have developed a numerical method, i.e. Eulerian scheme with Lagrangian particles, for computing a strongly nonlinear interaction between ship and wave with breaking. Firstly, in this study, the developed model is applied to evaluate propulsion performance of a fishing boat. We also applied the model to investigate seakeeping performance of a high-speed ferry. The resistance and motions, e.g. heave and pitch, were in good agreement with experimental results and the strip theory, In addition, we also discussed pressure distribution, velocity field and free surface motions around the fishing boat and high-speed ferry in waves with breaking. We showed that the Eulerian scheme with Lagrangian particles would provide a highly accurate solution and also would be usefulness and effectiveness as a ship design tool.

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Section: Methodsmentioning

confidence: 98%

Numerical Study on Propulsion and Seakeeping Performance of a Ship Using Eulerian Scheme with Lagrangian Particles

2011

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An innovative EFD using FBG pressure sensors for ship seakeeping

Suzuki,

Iwashita,

Kashiwagi

et al. 2024

J Mar Sci Technol

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This paper examines the acquisition of the measurement data of the spatial distribution of unsteady pressure on a ship advancing in waves. The purpose of the study is to investigate the reliability of the pressure data obtained by the unprecedented experiment and to provide experimental data of unsteady pressure which can be used for validation of arbitrary computation methods. The optical fiber sensing technology, so-called FBG (fiber Bragg gratings) sensing, is employed as the pressure sensors. In the experiment, 379 FBG pressure sensors (version 7; the latest version) in total are attached to the port side surface of ship model and also ordinary strain-type pressure sensors are embedded in the starboard side for validating reliability of FBG pressure sensors by comparing both results. In addition to the pressure distribution, measurement is made for unsteady hydrodynamic forces such as added mass, damping coefficients, and wave exciting forces, and also for ship motions and added resistance. Most of the measurement is repeated at least five times for each condition, and results of measured pressures are evaluated with mean value and standard deviation. Regarding the added resistance, the distribution for estimating added resistance is also extracted from obtained pressure distribution and its pressure contour is illustrated to show visually which hull region affects the added resistance significantly. Validation of the measured pressure with FBG pressure sensors is carried out also by integrating measured pressures over the ship model surface and comparing it with forces directly measured with load cells. The measured pressure distribution is compared with typical calculation results with the Rankine panel method in frequency domain to demonstrate usefulness of the spatial pressure data for validating the calculation method. Through these studies, it is confirmed that the measured unsteady pressures with FBG pressure sensors are accurate enough and valuable as the validation data for any calculation method.

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Development of CFD tool for evaluating of seakeeping performance of a ship in waves using Eulerian scheme with Lagrangian particle

Abstract: Development of CFD tool for evaluating of seakeeping performance of a ship in waves using Eulerian scheme with Lagrangian particle

Cited by 2 publications

References 12 publications

Numerical Study on Propulsion and Seakeeping Performance of a Ship Using Eulerian Scheme with Lagrangian Particles

Numerical Study on Propulsion and Seakeeping Performance of a Ship Using Eulerian Scheme with Lagrangian Particles

An innovative EFD using FBG pressure sensors for ship seakeeping

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