Comparative Study on Added Resistance and Seakeeping Performance of X-Bow and Wave-Piercing Monohull in Regular Head Waves

Shu-ling, Chen; Zou, Beilei; Han, Changzhi; Yan, Shiqiang

doi:10.3390/jmse10060813

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…Simanjuntak et al, [4] employed Ulstein axe-bow model on Pioneer ship 750 DWT and obtained the total ship's resistance decreased by 4.85% in the deep-water condition with h/t=19.3. Furthermore, Chen et al, [5] reported that the added ship's resistance in the waves condition with the axe-bow is smaller than the wave-piercing bow at the same forward speed. In particular, the investigation on predicting the total ship's resistance using the experimental model test for the validation purposes of numerical models is much recommended.…”

Section: Introductionmentioning

confidence: 99%

Computational Investigation into Predicting Total Resistance of Axe-Bow Ship’s in Calm Water

Ahmad Fitriadhy,

Rizuan Razali,

Atiqah Yaakup

et al. 2023

CFDL

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The axe-bow ship design has been primarily introduced to minimize ship's slamming condition during sailing, which inherently deals with sufficient of her total ship's resistance. The presence of nonlinear-hydrodynamic flow behaviours around the ship will forcefully impose pressure and viscous resistances on her hull. This complex phenomenon is so intricate that a reliable approach leading into more feasible prediction of her total ship’s resistance (RT) is necessarily required, while explaining the rationale behind the analysis results. This paper presents a computational investigation into prediction total ship's resistance of an axe-bow hull in the calm water condition. Here, the Computational Fluid Dynamic (CFD) software called Numeca Fine Marine was accordingly used. Several parameters such as various Froude numbers (Fr) and trim's angles, have been taken into account in the computational simulations. The results showed that the viscous ship’s resistance has more relatively significant influence on the axe-bow ship than the pressure ship’s resistance especially at Fr ≥ 0.568. It is noteworthy that this causes the pressure resistance coefficient (CP) decrease indicated with moderately diminished high-pressures acting on the axe-bow ship’s hull. The increase of the trim’s angle demonstrates that the existence of the higher turbulent viscosity extends over the entire submerged hull surfaces and causes reduction of the viscous coefficient (CV). In general, the subsequent increase of Froude number and the trim’s angle were proportionally to the total ship’s resistance. It can be concluded that the current computational results are useful as preliminary prediction of the total ship’s resistance towards determining the effective power.

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Section: Introductionmentioning

confidence: 99%

Computational Investigation into Predicting Total Resistance of Axe-Bow Ship’s in Calm Water

Ahmad Fitriadhy,

Rizuan Razali,

Atiqah Yaakup

et al. 2023

CFDL

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Influence of the main bulb’s parameters of bulbous bow vessels on heave and pitch motions for head sea

Ruiz-Capel,

Romero-Tello,

Gutiérrez-Romero

et al. 2024

IJSI

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PurposeThis paper addresses the influence of the main bulb’s parameters of a containership on heave and pitch RAO for head waves.Design/methodology/approachTo obtain the RAO curves, these parameters are scattered over the design space through latin hypercube sampling (LHS), where different bulb designs are obtained using the free form deformation (FFD) technique. Linear RAO curves are calculated based on numerical software, split into various frequency intervals and assessed according to six evaluation parameters.FindingsThe findings show that maximum, minimum and average values of the RAO curve are useful indicators to study the RAO of a ship. Average values of the curve are reduced more than 6% for heave and over 24% for pitch with respect to a vessel with a conventional bulbous bow. The best designs concentrate the volume around the mid-lower part of the bulb, whilst the worst designs concentrate the bulb volume towards the upper part of the bulb.Originality/valueIn the literature, we get an overview of the influence of different bows on seakeeping. However, the influence of the bulb or large variations of the bow in a parametric way have not been studied yet. Since most of these parameters are derived from the RAO curve and ship motions, this paper focuses on studying the RAO curve for heave and ship motions of a bulbous bow containership. The objective is to minimize the RAO values of the curves so that most derived parameters reduce their values as well.

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Experimental Study of the Heave and Pitch Motions of an Inverted Bow Hull

Khoob,

Sayar,

Vakilabadi

et al. 2023

JEMS

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Comparative Study on Added Resistance and Seakeeping Performance of X-Bow and Wave-Piercing Monohull in Regular Head Waves

Cited by 3 publications

References 9 publications

Computational Investigation into Predicting Total Resistance of Axe-Bow Ship’s in Calm Water

Computational Investigation into Predicting Total Resistance of Axe-Bow Ship’s in Calm Water

Influence of the main bulb’s parameters of bulbous bow vessels on heave and pitch motions for head sea

Experimental Study of the Heave and Pitch Motions of an Inverted Bow Hull

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