【作者】 李林；

【导师】 汪春辉；

【作者基本信息】 哈尔滨工程大学 ， 船舶与海洋结构物设计制造， 2023， 硕士

【摘要】 门舵作为一种类似于加速导管的新型船舶节能和机动装置,提供额外推力的同时,螺旋桨两旁可以单独控制的舵叶也可增强船舶的操纵性能。门舵在日本的一艘集装箱船上实现首次全面应用,结果表明门舵在提高该船的推进效率、节省燃料的同时,还表现出优良的操纵、噪音和振动特性。截至目前,对门舵的研究还在进一步完善当中。一方面,针对门舵的设计、节能效果以及节能机理的研究大多是基于模型试验的方式,其在设计精度、时间成本上有待于进一步提高;另一方面,针对门舵操纵性能的研究还处于初步阶段。因此,本文针对JBC标模船,基于CFD和CAESES耦合方法开展了门舵的匹配优化设计,探究了门舵的节能机理并预报其节能效果;并初步探究了计及船艉伴流场条件下的门舵各操纵工况下的压力、诱导激振力以及流场特性。最终,通过本文的研究形成了一套快速、完善的基于CFD的门舵匹配优化设计方法。安装门舵后,JBC船的粘压阻力减少,在既定航速下体现出8.05%的节能效果,且门舵所产生的激振力较小。首先对标模JBC船的阻力及自航进行数值计算,将计算结果与试验值进行对比,验证了数值网格划分策略和数值计算方法的精度;基于CAESES实现了JBC船艉门舵的参数化建模后,结合STARCCM+计算平台耦合实现了门舵的变参数计算,基于多元线性回归分析方法完成了门舵特征参数的敏感度分析,并依据分析结果,得到了与JBC标模匹配效果较优的门舵模型。其次,对门舵-螺旋桨系统的敞水性能进行数值预报,分析门舵对螺旋桨敞水性能的影响;再开展船-桨-门舵一体阻力及自航计算,对比船-桨-传统舵系统,分析门舵对船体以及船后螺旋桨水动力性能的影响。最后以船艉桨盘面处的轴向速度作为输入条件,对单独螺旋桨在伴流条件下的水动力性能进行分析,与真实的船-桨进行比较以验证计算方法的精度;对直航工况、回转工况下的桨-传统舵、桨-门舵系统的水动力性能进行计算比较分析;对桨-门舵系统的两种特殊操纵工况进行计算,通过对其流场的压力、速度以及流线的分析,探究其操纵原理。更多还原

【Abstract】 The gate rudder is a new type of Marine energy saving and maneuvering device,which is similar to the acceleration ducted propulsor.While providing additional thrust,the rudder blades on both sides of the propeller can be controlled separately to enhance the ship’s maneuvering performance.The gate rudder was first fully applied on a container ship in Japan.The results showed that in addition to improving the ship’s propulsive efficiency and saving about 14% of fuel in sea trials,the gate rudder also showed excellent maneuvering,noise and vibration characteristics.Up to now,the research of gate rudder is still in the process of further improvement.On the one hand,the research on the design,energy-saving effect and energysaving mechanism of the rudder is mostly carried out based on the model test,and its design accuracy and time cost need to be further improved.On the other hand,the research on maneuverability of gate rudder is still in the preliminary stage.Therefore,in this paper,based on JBC model ship,CFD method is used to carry out the matching optimization design of gate rudder,explore the energy-saving mechanism of gate rudder and forecast its energysaving effect.The pressure,induced excitation force and flow field characteristics of the gate rudder under various operating conditions were developed considering the stern flow field.Finally,through the research of this paper,a set of fast and perfect design method of gate rudder matching optimization based on CFD is formed.After the gate rudder is installed,the viscous resistance of the JBC ship is reduced,and the energy saving effect is 8.05% at the given speed,and the exciting force generated by the gate rudder is small.In this paper,the numerical calculation of the resistance and self-navigation of the standard model JBC ship is carried out,and the calculated results are compared with the experimental values to verify the accuracy of the numerical calculation method and the meshing strategy.After the parametric modeling of JBC stern rudder was realized based on CAESES,the variable parameter calculation of the stern rudder was realized coupled with CFD platform.The sensitivity analysis of the characteristic parameters of the stern rudder was completed based on the multiple linear regression analysis method.According to the analysis results,the gate rudder model with better matching effect with JBC standard model was obtained.Numerical prediction of the open water performance of the gate rudder and propeller system is conducted,and the impact of the gate rudder on the open water performance of the propeller is analyzed;Then,the integrated resistance and self-propelled calculation of the ship,propeller and gate rudder are carried out,and the influence of the gate rudder on the hydrodynamic performance of the ship hull and the propeller behind the ship is analyzed by comparing the ship,propeller and traditional rudder system.Finally,the hydrodynamic performance of a propeller under wake conditions is analyzed using the axial velocity at the stern propeller disk as an input condition,and compared with a real ship propeller to verify the accuracy of the calculation method;The hydrodynamic performance of the propeller traditional rudder system and the propeller gate rudder system under direct sailing and rotary conditions are calculated and compared;This paper calculates two special operating conditions of the propeller gate rudder system,and explores its operating principles by analyzing the pressure,velocity,and streamline of its flow field.更多还原