Hydrodynamic Design Study on Ship Bow and Stern Hull Form Synchronous Optimization Covering Whole Speeds Range

Lu, Yu; Chang, Xin; Yin, Xunbin; Li, Ziying

doi:10.1155/2019/2356369

Cited by 10 publications

(4 citation statements)

References 24 publications

(18 reference statements)

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“…The choice of the shape of the top side stern section should be decided on the basis of Froude number. The design hull form of a ship taking into account proper speed have been studied such as Lu et al [7] proposed an innovative methodology of synchronous local optimization of ship bow and stern hull form considering the whole ship speed range. Ghasemi and Zakerdoost [8] proposed design methodology that represents a comprehensive approach to optimize the hull-propeller system simultaneously wherein the well-known evolutionary algorithm based on NSGA-II was employed to handle the multi-objective problems, where the main propeller and hull coefficients are the unknown and are considered as design variables.…”

Section: Stapersma and Woudmentioning

confidence: 99%

Investigating the Performance of a Ship by Matching the Stern Hull Form to Propeller and Engine Power

Anggriani

Baso

2021

EPI-IJE

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Designing the form of the ship stern hull could have some impacts on the efficiency of ship propeller and the requirement of the ship speed. Therefore, stern hull form of a ship matched to its propeller and engine power is important consideration in preliminary ship design stage. The main objective of this study is to investigate ship performance by matching the stern hull shape to the propeller diameter and engine power toward high speed. This study was conducted by free running model test and Maxsurf Resistance application. The stern forms were employed U-shape and V-shape. In addition, the fixed pitch propeller (FPP) with three blades was used and the diameter is varied into three sizes 0.032 m, 0.040 m, and 0.048 m. The results show the increase of propeller diameter increases model’s speed for both U-shape and V-shape stern and the effect of the propeller diameter on the speed could be described by using the equations of second-order polynomial. The optimum propeller diameter could be determined taking into account stern hull form, stern shape, tip clearance, and proper speed where then propeller diameter related to draft is given by 0.79T with tip clearance 10%Dp for both U-shape and V-shape. The ship resistances of U-shape stern at Fr 0.221 and V-shape at 0.208 are obtained approximately 89.797 KN and 77.10 KN respectively. Furthermore, the powers of ship for both U-shape and V-shape at those Fr are obtained 904,374 KW and 726,807 KW respectively. Finally, the best stern hull form matched to propeller diameter and engine power is selected and given by U-shape stern.

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Section: Stapersma and Woudmentioning

confidence: 99%

Investigating the Performance of a Ship by Matching the Stern Hull Form to Propeller and Engine Power

Anggriani

Baso

2021

EPI-IJE

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“…Several research works have addressed the impact of key factors on ship resistance [3][4][5][6][7]. Luu D.D., et al [3] used the RANSE method to evaluate the influence of the LCB position on the resistance of the JBC ship model.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Influence of Ship Hull Form Modification on Resistance of the 4600DWT Cargo Ship Using RANSE Method

Ngoc,

Hai Ha,

Ngoc

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Optimization of ship hull form in the ship design process aims to reduce ship resistance, which is crucial for economic efficiency and meets the International Maritime Organization (IMO) requirement for emission reduction and energy saving. This paper investigates the impact of the longitudinal centre of buoyancy (LCB) position on the resistance of a cargo ship 4600DWT using the RANSE (Reynolds – averaged Navier – Stokes equation) method. The ship hull form was modified using the Lackenby method. The obtained numerical results indicate that the LCB position significantly affects ship resistance. The physical phenomenon of the change in ship resistance is also explained through the analysis of the differences in the flow field around the ship’s hull form with modified LCB positions.

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“…Feng et al 14 optimized hullform of an offshore aquaculture vessel by using a surrogated model. Lu et al 15 developed a B spline optimization method for modifying bow and stern region of KCS ship hull. They employed NSGA-II optimization algorithm to make an automation and applicable optimization cycle, which decreased resistance by 4%.…”

Section: Introductionmentioning

confidence: 99%

Bow shape modification through multi-objective hydrodynamic optimization: Methodology comparison between CAD-based FreeForm Deformation and Mesh-based Radial Basis Function approach

Ghadimi

Nazemian

2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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Marine industrial engineering face crucial challenges because of environmental footprint of vehicles, global recession, construction, and operation cost. Meanwhile, Shape optimization is the key feature to improve ship efficiency and ascertain better design. Accordingly, the present paper proposes an automated optimization framework for ship hullform modification to reduce total resistance at two cruise and sprint speeds. The case study is a bow shape of a wave-piercing bow trimaran hull. To this end, a multi-objective hydrodynamic problem needs to be solved. A combined optimization strategy using CFD hullform optimization is presented using the software tools STAR-CCM+ and SHERPA algorithm as optimizer. Furthermore, a comparison is made between CAD-based and Mesh-based parametrization techniques. Comparison between geometry regeneration methods is performed to present a practical and efficient parametrization tool. Design variables are control points of FreeForm Deformation (FFD) for CAD-based method and Radial Basis Function (RBF) for Mesh-based method. The optimization results show a 4.77% and 2.47% reduction in the total resistance at cruise and sprint speed, respectively.

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Hydrodynamic Design Study on Ship Bow and Stern Hull Form Synchronous Optimization Covering Whole Speeds Range

Cited by 10 publications

References 24 publications

Investigating the Performance of a Ship by Matching the Stern Hull Form to Propeller and Engine Power

Investigating the Performance of a Ship by Matching the Stern Hull Form to Propeller and Engine Power

Numerical Investigation on the Influence of Ship Hull Form Modification on Resistance of the 4600DWT Cargo Ship Using RANSE Method

Bow shape modification through multi-objective hydrodynamic optimization: Methodology comparison between CAD-based FreeForm Deformation and Mesh-based Radial Basis Function approach

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