Experimental and numerical study on the scale effect of stern flap on ship resistance and flow field

Guo, Chunyu; Wang, Chao; Sun, Cong; Li, Ping; Zhong, Ruo-fan

doi:10.1080/17445302.2019.1697091

Cited by 18 publications

(12 citation statements)

References 30 publications

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“…The bow flat was not considered because it was hard to be installed on this vehicle. Previous analogous researches have been carried out on deep-vee ship, with a drag-reduction rate of less than 10% [15], [16]. That could not meet our requirement.…”

Section: Introductionmentioning

confidence: 87%

Influence on Stern Flaps in Resistance Performance of a Caterpillar Track Amphibious Vehicle

Sun

Wang

2020

IEEE Access

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In order to reduce the resistance and increasing speed for a caterpillar track amphibious vehicle (CTAV), the stern flaps were applied and the influence was researched. Numerical simulations performed by STAR-CCM+ and model towing test reveal that stern flaps have greatly reduced the resistance, trim, and sinkage of the CTAV when the length Froude number is between 0.63 and 1.05. The length and flap angle were optimized by numerical simulation. In addition, the residual resistance plays a dominant role in resistance reduction, which contributes to more than 90% of the total resistance reduction. Installing stern flaps increase the vehicle waterline by 7% and enhance the virtual-length effect. Furthermore, the running attitude becomes steadier, thereby decreasing the trim and sinkage. Therefore the resistance performance of the CTAV can be enhanced by installing stern flaps with a proper length at an optimal flap angle. INDEX TERMS Caterpillar track amphibious vehicle, CFD, resistance performance, running attitude, STAR-CCM+.

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Section: Introductionmentioning

confidence: 87%

Influence on Stern Flaps in Resistance Performance of a Caterpillar Track Amphibious Vehicle

Sun

Wang

2020

IEEE Access

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“…The latter method is more efficient and convenient than the model test method in analysing the flow field, which allows designers to develop or improve their design for hydrodynamics optimization studies [4,5]. In recent years, for numerical simulation, the Reynolds Averaged Navier-Stokes Equations (RANSE) approach has been widely used for ship hydrodynamic prediction in general [6][7][8] and ship resistance prediction in particular, due to sufficient accuracy and efficient computation for engineering purposes [9][10][11][12][13][14][15][16][17][18]. Therefore, this research will focus on studying the influence of the L/B parameter on ship resistance by using the RANSE method.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Length to Beam Ratio Effects on Ship Resistance Using Ranse Method

Anh

et al. 2023

Polish Maritime Research

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The paper discusses the length to beam (L/B) ratio effects on ship resistance at three different Froude numbers using unsteady RANSE simulation. First, the JBC ship model was used as an initial hull form for verification and validation of predicted ship resistance results with measured data, and then the influence of the L/B ratio on ship resistance was carried out. Ship hull forms with different L/B ratios were produced from the initial one by using the Lackenby method. The numerical results obtained show the L/B ratio’s effect on ship resistance. Increases of the L/B ratio led to gradual reduction of the total ship resistance and vice versa. Analysis of the changing of the resistance components indicates that the pressure resistance changes are considerably larger than the frictional one. Finally, the paper analyses the difference in the flow field around the hull of the ship with variation of the L/B ratio to fully understand the physical phenomenon in the change of ship resistance at different L/B parameters.

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“…A preferred alternative method, the RANSE approach, could provide more detailed information on the flow around the ship hull, acceptably reliable results, less time, and lower cost than experimental method [1]. Therefore, the RANSE method has been broadly applied in studying the flow around the hull and predicting the ship's hydrodynamic parameters [1][2][3][4][5][6][7][8][9]. As proof, the study conducted by Satu Hänninen & Juha Sehweighofer [2] on the flow around the containership Hamburg Test Case at various model scales using the numerical RANSE method.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Flow Around The 4600DWT Cargo Ship in Calm Water Condition Using RANSE Method

Ngoc,

Hai Ha,

Ngoc

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Information about the flow field around the ship may enable the designers to improve ship hull form concerning ship hydrodynamics. The flow around the ship can be obtained through model tests in towing tank and simulations. However, the experimental method provides the most reliable data about flow around the ship, but this method is too expensive and time-consuming. Currently, the RANSE (Reynolds – averaged Navier – Stokes equation) method has been widely employed in predicting the ship resistance and flow around the ship in the ship design process due to it provides relatively accurate results, savings in time and money compared to the experimental method. Therefore, this paper deals with the numerical results of the study flow around the 4600DWT cargo ship, which operate on Vietnam’s river-sea routes in calm water condition at different ship speeds using the RANSE method. The effect of ship speed on ship resistance components, wave pattern, wave profile along the ship, distribution of dynamic pressure, and wall shear stress on the ship’s hull surface and nominal wake field are presented and analysed in the paper.

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Experimental and numerical study on the scale effect of stern flap on ship resistance and flow field

Cited by 18 publications

References 30 publications

Influence on Stern Flaps in Resistance Performance of a Caterpillar Track Amphibious Vehicle

Influence on Stern Flaps in Resistance Performance of a Caterpillar Track Amphibious Vehicle

Numerical Investigation of Length to Beam Ratio Effects on Ship Resistance Using Ranse Method

Numerical Simulation Flow Around The 4600DWT Cargo Ship in Calm Water Condition Using RANSE Method

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