大型半潜船球首设计及阻力性能对比分析

在船速较低的肥大型船舶上，安装球鼻艏会在很大程度上降低船舶受到的阻力，球艏对艏部型线有缓和的作用,使船舶艏部水流发生改变,减少艏底漩涡,从而降低形状阻力，进而改善船舶的水动力性能。根据设计的10万吨级半潜船船型的船模静水阻力试验情况，该船舶船首由直立型改为球鼻艏型式，通过对原型和改进后的船型的阻力试验结果进行对比，检验了新船型的减阻性能，同时对船尾伴流场进行了研究，发现船首形状改变对尾部半流场影响不大

Comparative analysis of the Design and Resistance performance of Large Semi-submersible Ship

In the low speed ship mast type, installation of bulbous bow will reduce the ship''s resistance to a great extent, a moderate effect on the bow bow line, the ship''s bow flow change, reduce the bow bottom vortex, which reduces form drag, and then improve the hydrodynamic performance of the ship, according to ship model resistance test of a semi submersible vessel, the ship bow from upright type to bulbous bow type, by comparing the test results of prototype ship resistance and improved the test of the drag reduction performance of new ship type. At the same time, the stern wake field is studied and it is found that the bow shape change has little effect on the tail half-tail flow field.