Numerical calculation of the influence of different bow shapes on added resistance of large container ships
To explore the influence of bow shape on added resistance in head and oblique waves,firstly,the added res-istance and surrounding flow field variation of a very large container ship with five typical bows were studied by using the three-dimensional time-domain Rankine source method.Secondly the effect of the height of the erect bow base from the baseline on the added resistance is studied.The results show that the axe bow and the erect bow have the best drag reduction performance due to their smaller entrance angle.Compared with clipper bow and raked bow,the added resistance coefficient of erect bow and axe bow can be reduced by about 20％.In the long-wavelength region,the greater the sinking depth of the erect bow,the smaller the added resistance coefficient,and the greater the sinking depth of 6 m can reduce the added resist-ance coefficient by 10％.The opposite is true in the short-wavelength region.
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