高速三体船的阻力预报方法研究

Resistance prediction method research of high speed trimaran

高速航行的三体船,其航行姿态会随着傅汝德数(Fn)的增加而发生变化。常见的CFD计算预报实船阻力常常以设计浮态为基准、固定船舶航行姿态的方法进行,也是导致计算偏差的原因之一。文中选定一艘三体船模型,针对自由和约束两种展开CFD数值模拟和阻力计算,得到其差别。为了进一步了解其兴波情况和摩擦阻力的变化规律,在0.3<Fn<0.6的范围内对处于自由和约束状态下的模型流场相关细节进行了分析。最后,对该三体船型进行了模型试验验证。

For the High speed trimarans, navigation attitude will change with the increase of Froude number. In order to design the attitude of the float state of structure as a benchmark, there is a certain error for fixed shipping normal CFD resistance calculation forecasting arc resistance. Aimed at tourism body form, using the free model state and validating the resistance test of the fixed model state analysis, get the difference. In order to further understand the laws for wave-making and frictional resistance, 0.3＆lt;Fn＆lt;0.6 within the scope of the state of free model and fixed model respectively through numerical simulation, the flow field of the de-tails is analyzed. Finally, the model test was carried out to verify the results.