以伴流均匀度为目标的艉部线型优化

以某3 100箱集装箱船（3 100 TEU）为研究对象，进行了以提高伴流均匀度为目标的船艉优化方法研究.采用软件Friendship中的Framework模块对原型后体进行修改，采用FLUENT前处理GAMBIT软件生成网格.在统一网格形式下，基于FLUENT软件平台对三型船体绕流进行了数值模拟和静水力参数、阻力及伴流分析，并采用船形特征值x-i对船形进行了U、V度分析.结果表明：max(x-i)对应的站号越大（从船艉至船艏依次编号），伴流均匀度越好；靠近艉部的x-i值偏低有利于提高伴流均匀度.将艉部横剖面形状朝极端U形方向改的阻力仅增大0.61%，则伴流峰、伴流梯度、伴流不均匀性征即有明显改善.

Stern Form Optimization Aimed at Wake Uniformity

Method of stern form optimization aimed at improvement of wake non uniformity was researched. A 3 100 TEU container ship was taken as initial hull in the optimization process. Based on the module of Framework imbedded in the CFD code Friendship, the two modified after bodies were created. The pre processed code of FLUENT, GAMBIT, was used to produce the mesh. Based on the uniform mesh form, the flow fields around three hull forms were numerically simulated. Hydrostatic parameters, resistance coefficients and wakes were analyzed. Through the numerical feature of section shape, x-i, the degree of U, V shape of hull form was also analyzed. The results show that the larger the section number where the value of max(x-i) arise, the better the wake uniformity. From stern to bow, the section number increases. The value of x-i should be lower as it gets closer to the stern. By adapting the after body of hull to extreme U shape section, not only wake peak, wake gradient but also wake non uniformity is improved apparently, while its resistance increases only 0.61%.