基于FLUENT的拖网渔船球鼻艏形状减阻优化研究

Study of resistance optimization for shape of bulbous bow of stern trawler based on FLUENT

船舶阻力预报是反映船舶安全性与快速性的关键指标.针对现有阻力计算方法存在的耗时长、精确度不够等问题,提出一种利用FLUENT数值模拟技术来实现的拖网渔船阻力预报的快速优化法.船舶球鼻艏对阻力性能具有非常大的影响,应用参数设计法可生成一系列球鼻艏的型线,实现模型的通用化表达,提高流场转换和分析的灵活度,解决经验设计中不可控变量所导致的偏差.与试验结果比较证明该方法计算速度快、预报精度高,设计模型适用于工程和研究.

It is important to predict the ship resistance in terms of security and quickness of the ship.Aiming at solving the problem in the present resistance calculation which is time-consuming and is not enough accurate,the optimization method of resistance prediction on the bulbous bow for a stern trawler is presented by FLUENT in numerical simulation technology.The bulbous bow has a big impact on resistance performance of ship.In order to reduce errors caused by uncontrollable variables in experience design,the parametric design method is used to complete the universal expression of the models and increase the flexibility of flow field conversions and analysis by generating a series of molded lines of bulbous bows.After comparing the experimental results,it is shown that the optimization method is fast and accurate,and the model is practical for engineering and research.