Investigation of the Flow Field of a Ship in Planar Motion Mechanism Tests by the Vortex Identification Method
Investigation of the Flow Field of a Ship in Planar Motion Mechanism Tests by the Vortex Identification Method
复制标题
涡辨识法研究船舶平面运动机构试验流场
DOI：
10.3390/jmse8090649
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发表时间：
2020
影响因子：
2.9
通讯作者：
Decheng Wan
中科院分区：
文献类型：
--
作者：
Zhen Ren;Jianhua Wang;Decheng Wan
平面运动机构（PMM）试验提供了一种获得评估船舶操纵性能所需的水动力导数的方法。本文采用基于开源代码平台OpenFOAM自主开发的计算流体动力学（CFD）求解器naoe-FOAM-SJTU，结合重叠网格法，对基准模型“玉鹏”轮PMM试验的复杂粘性流场进行了数值模拟。本文讨论了漂移角和周期等参数对船舶水动力性能的影响，并将预报的力和力矩的时间历程与试验数据进行了比较。为了研究复杂粘性大分离流动，采用了四种涡识别方法来捕捉涡结构。结果表明，静载漂移试验和动载漂移试验测得的力和力矩吻合较好。通过对涡结构的比较，发现第三代涡识别方法OmegaR和Liutex能够更准确地捕捉涡结构。结果表明，本文的数值格式是可靠的，第三代涡识别方法更适合于显示复杂粘性流场的涡结构。
Planar motion mechanism (PMM) tests provide a means of obtaining the hydrodynamic derivatives needed to assess ship maneuverability properties. In this paper, the self-developed computational fluid dynamic (CFD) solver based on the open source code platform OpenFOAM, naoe-FOAM-SJTU, associated with the overset grid method is used to simulate the complex viscous flow field of PMM tests for a benchmark model Yupeng Ship. This paper discusses the effect of several parameters such as the drift angle and period on the hydrodynamic performance of the ship and compares the time histories of the predicted forces and moments with experimental data. To investigate the complex viscous flows with a large separation, four vortex identification methods are used to capture the vortex structures. The results show that the forces and moments are in good agreement in static drift and dynamic tests. By comparing the vortex structures, it is found that the third generation vortex identification methods, OmegaR and Liutex, are able to more accurately capture the vortex structures. The paper concludes that the present numerical scheme is reliable and the third generation vortex identification methods are more suitable for displaying the vortex structures in a complex viscous flow field.