不同船首对大型集装箱船波浪增阻影响的数值计算
Numerical calculation of the influence of different bow shapes on added resistance of large container ships
谢千慧 1马宁 1史琪琪1
作者信息
- 1. 上海交通大学船舶海洋与建筑工程学院,上海 200240;上海交通大学海洋工程国家重点实验室,上海 200240;上海交通大学海洋装备研究院,上海 200240
- 折叠
摘要
为探究迎浪和斜浪中船首形状对于波浪增阻的影响,本文在只改变船首的情况下,首先利用三维时域Rankine源方法对分别装有5种典型船首的某超大型集装箱船的波浪增阻和周围流场变化进行研究,其次开展直艏下沉深度(直艏底部距离基线的高度)对波浪增阻影响的研究.结果表明,斧型艏和直艏由于其半进流角较小等特征,其减阻性能最优.直艏和斧型艏相较于飞剪艏和前倾艏,其波浪增阻系数可以减小20％左右.直艏下沉深度在长波区和短波区呈现相反的减阻性能,在长波区,直艏下沉深度越大,波浪增阻系数越小,其下沉深度增大6m可减小波浪增阻10％;在短波区则相反.
Abstract
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.
关键词
船舶耐波性/波浪增阻/斧型艏/斜浪/Rankine源Key words
seakeeping/added resistance/axe bow/oblique wave/Rankine source引用本文复制引用
出版年
2024
NETL
NSTL
万方数据