Validation of the CFD approach for modelling roughness effect on ship resistance

OCEAN ENGINEERING

卷:200

Article

Song, Soonseok¹  Demirel, Yigit Kemal¹  Atlar, Mehmet¹  Dai, Saishuai¹  Day, Sandy¹  Turan, Osman¹ 

[1] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, 100 Montrose St, Glasgow G4 0LZ, Lanark, Scotland

关键词: Ship resistance;    Hun roughness;    Computational fluid dynamics (CFD);    Roughness effect;    KRISO container ship (KCS);    Added resistance;   

DOI  :  10.1016/j.oceaneng.2020.107029

来源: Elsevier

【 摘 要 】

Recently, there have been active efforts to investigate the effect of hull roughness on ship resistance using Computational Fluid Dynamics (CFD). Although, several studies demonstrated that the roughness modelling in the CFD simulations can precisely predict the increase in frictional resistance due to the surface roughness, the experimental validations have been made only for flat plates which have zero pressure gradient. This means that the validations cannot necessarily guarantee the validity of this method for other ship resistance components besides the frictional resistance. Therefore, it is worth demonstrating the validity of the roughness modelling in CFD on the total resistance of a 3D hull. In this study, CFD models of a towed flat plate and a KRISO Container Ship (KCS) model were developed. In order to simulate the roughness effect in the turbulent boundary layer, a previously determined roughness function of a sand-grain surface was employed in the wall-function of the CFD model. Then the result of the CFD simulations was compared with the experimental data. The result showed a good agreement suggesting that the CFD approach can precisely predict the roughness effect on the total resistance of the 3D hull. Finally, the roughness effects on the individual ship resistance components were investigated.

【 授权许可】

Free