Numerical modelling of structure responses for high-speed planing craft in waves

Rosén, Anders; Garme, Karl; Razola, Mikael; Begović, Ermina

doi:10.1016/j.oceaneng.2020.107897

Cited by 8 publications

(5 citation statements)

References 23 publications

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“…Future work from the experimental side will face a wide range of wave frequencies to validate the LincoSim platform. The overall conclusions for these very first steps are that the results are very promising, as the observed differences between numerical and experimental data for heave and pitch are within a few percents, aligned with the results of [14,32,33]. More importantly, the simulation monitored output for the accelerations can spot the presence of multiple frequencies instead of just the one related to the regular encounter wave signal, thus confirming the ability of CFD simulation to account for relevant nonlinear responses of the ship while planing.…”

Section: Measured Vs Calculated Results In Regular Wavessupporting

confidence: 62%

“…For the seakeeping behavior of planing hulls, as characterized by the strong nonlinear phenomena, the simplest approach of comparing the RAO of the first harmonic of response and wave is not optimal. In [14,31,32] authors used the spectral analysis and showed not only the RAO as the first harmonic but also the super-harmonics of pitch and accelerations.…”

Section: Measured Vs Calculated Results In Regular Wavesmentioning

confidence: 99%

“…Seakeeping of the planing hull in designer practice is often limited to the calculation of the vertical accelerations at the center of gravity and bow, as they are the input for structure scantling and added resistance in waves, according to the regression formula developed by [11,12]. Even though mathematical models developed according to [13][14][15] have proven validity for the prediction of prismatic hulls, their use is still limited to the research groups, not to the designer communities. The experimental results of the recent systematic series [16][17][18] are available, but they are often limited to their ranges and provide as the final result the statistical distribution for accelerations.…”

Section: Introductionmentioning

confidence: 99%

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Planing Hull Hydrodynamic Performance Prediction Using LincoSim Virtual Towing Tank

Begovic,

Bertorello,

Ponzini

et al. 2024

JMSE

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This work shows the performance of LincoSim, a web-based virtual towing tank enabling automated and standardized calm water computational fluid dynamics (CFD) data sampling, extending previous published applications to the case of a high-speed hull. The calculations are performed for a 1:10 scale model of a 43 ft powerboat hull form in the Froude number range from 0.3 to 2.0. The counterpart physical model is the experimental fluid dynamics (EFD) campaign performed at the University of Naples Federico II, where the resistance, sinkage and trim data have been measured. The EFD/CFD data comparison is performed and shown with a discussion of the spotted differences. The average percentage differences between the EFD and CFD data for the whole speed range are 1.84, 6.87 and 6.94 for the resistance, dynamic trim, and sinkage, respectively. These results confirm the maturity of the standardized and automated CFD modeling for calm water hydrodynamic analysis included in LincoSim, even at very high Froude numbers. The wetted length of the keel and chine and the wetted surface are calculated from numerical data using the advanced post-processing. Finally, as a work in progress, we test a first comparison for the same hull of the EFD and CFD data, considering two seakeeping conditions for head waves at a given wavelength for two velocity conditions. Also, this kind of analysis confirms the tight correlation between the measured and computed outcomes. This synergic interplay of EFD and CFD can link the advantages of both methods to support hull design but also requires experiment planning and final data analysis to obtain physical parameters not easily measurable in laboratory, such as the wetted surface, wetted lengths, proper viscous contribution, and pressure distribution both in calm water and in waves.

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Section: Measured Vs Calculated Results In Regular Wavessupporting

confidence: 62%

Section: Measured Vs Calculated Results In Regular Wavesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Planing Hull Hydrodynamic Performance Prediction Using LincoSim Virtual Towing Tank

Begovic,

Bertorello,

Ponzini

et al. 2024

JMSE

Self Cite

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“…So, the hull stability analysis must be employed to evaluate and simulate the stability of the airboat which will determine the transverse and longitudinal location of the vessels Centre of gravity and displacement in loaded and unloaded conditions and to verify its intact stability. Furthermore, the Hydrostatics and hydrodynamics parameters, Wave and frictional drag, Curve of areas and the wetted lengths were considered by several authors [12], [13], [14], [15] Several works have been done on the hydrodynamic analysis for a planning craft, but much work have not been done on the seakeeping analysis and motion response system of the airboat. The computation of the steady wave patterns generated by a planning hull moving at a constant forward speed is a matter of high interest for naval architects and marine and ocean engineers this is because it plays a vital role in the stability and safety of the boat [16], [17], [18], [19].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the air-water interface effects of an airboat

Samson Nitonye,

Tamunodukobipi Daniel,

Douglas Ibiba

2024

Global J. Eng. Technol. Adv.

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This paper describes the Air-Water Interface (AWI) occurrence effects of the airboat at various speed, draught, and trim angle. This evaluates the dynamics of AWI with focus on the mechanisms involved in air displacement, the formation of air cushion, boundary layer turbulence, surface tension and wave generation. The analysis involves the change in speed, draught, and trim (0, 1, 1.5 and 2 degrees). The speed of 1.01 and 3.35m/s for displacement and planning regions of the airboat operation were examined. At the AWI, the thin layer of water molecules is affected by the airboat movement at the said trim, it is observed that the layer at the boundary will experience turbulence due to passing air over the layer and the interaction between the air and water at the interface causes mixing and creates waves or ripples at that trim. The wave generated at various trim angles will also create unique wave even at the same speed and draught with a change in trim. The difference in wave formation is seen not to be the same with the change in trim and these changes are observed at the bow and the aft of the vessel. This is also connected to the volume displacement of the boat, the resistance of the vessels, the angle of trim of the airboat and the hull form of the boat. This shows that displacement, resistance, angle of trim and hull form of the boat play critical and crucial roles in wave formation especially for the airboat.

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“…Several papers discuss this topic, for instance, Volpi et al, (2017) [20]. An overview of the different approaches in the fluid-structure interaction application for the high-speed craft is available in a recent paper of Rosen et al, (2020) [21].…”

mentioning

confidence: 99%

Performance Assessment of a Planing Hull Using the Smoothed Particle Hydrodynamics Method

Tagliafierro

Mancini

Ropero-Giralda

et al. 2021

JMSE

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Computational Fluid Dynamics simulations of planing hulls are generally considered less reliable than simulations of displacement hulls. This is due to the flow complexity around planing hulls, especially in the bow region, where the sprays are formed. The recent and constant increasing of computational capabilities allows simulating planing hull features, with more accurate turbulence models and advanced meshing procedures. However, mesh-based approaches based on the finite volume methods have shown to be limited in capturing all the phenomena around a planing hull. As such, the focus of this study is on evaluating the ability of the Smoothed Particle Hydrodynamics mesh-less method to numerically solve the 3-D flow around a planing hull and simulate more accurately the spray structures, which is a rather challenging task to be performed with mesh-based tools. A novel application of the DualSPHysics code for simulating a planing hull resistance test has been proposed and applied to the parent hull of the Naples warped planing hull Systematic Series. The drag and the running attitudes (heave and dynamic trim angle) are computed for a wide range of Froude’s numbers and discussed concerning experimental values.

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Numerical modelling of structure responses for high-speed planing craft in waves

Cited by 8 publications

References 23 publications

Planing Hull Hydrodynamic Performance Prediction Using LincoSim Virtual Towing Tank

Planing Hull Hydrodynamic Performance Prediction Using LincoSim Virtual Towing Tank

Numerical simulation of the air-water interface effects of an airboat

Performance Assessment of a Planing Hull Using the Smoothed Particle Hydrodynamics Method

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