基于数值模拟的船艏抗气泡性能分析

对船舶静水中航行问题进行了CFD数值模拟,分析了船艏抗气泡性能。为获得船体周围气泡分布规律,在船前来流中添加气泡,并基于拉格朗日描述法追踪气泡的运动。根据计算得到的气泡分布特点,通过修改船艏线型改善了船舶的抗气泡性能。此外,开展了模型试验,通过船体表面的流线验证了数值模拟方法的可靠性。

A Numerical study on the Anti-babble Performance of a Ship Bow based on CFD

Anti-bubble performance of a ship bow is numerically investigated by simulating the calm water resistance of the ship based on CFD. The bubble distribution at the bottom of the vessel was assessed by distributing bubbles in front of the bow and tracking them in simulation. In this way, the anti-bubble performance of the vessel is estimated and is improved by modifying the hull line. It is found that the sweep down phenomena of the bubble in the vicinity of bow was successfully delayed by optimizing the bulbous bow shape, thus the anti-bubble ability of the hull is improved. In addition, a model test was carried out to validate the CFD simulation. Good agreement is obtained between CFD and experiment in terms of the limited streamline on the hull surface.