基于MQ插值的变形网格在船舶阻力预报中的应用

发布时间：2018-04-22 12:26

  本文选题：Multi-quadric插值 + 网格变形　； 参考：《船舶力学》2016年04期

【摘要】：在非结构切分网格的框架下,发展了一种基于Multi-Quadric插值的变形网格技术,结合CFD软件STARCCM+,采用SST湍流模型,并以VOF法进行自由液面的追踪,将该变形网格技术应用于带附体穿浪双体船的阻力预报中。分别以网格的拉伸变形和斜率变形实现了阻流板和尾楔的边界运动,计算了阻流板高度为4 mm、6mm和8 mm以及尾楔角度为5°、10°和15°时的工况。计算结果表明,变形网格方法与固定网格方法取得了相同的精度;同试验值相比,在不同工况下变形网格最大平均误差约为6.67%,验证了其可行性。但是,相比于固定网格方法,变形网格方法的计算时耗最大可减少40%,因此采用该变形网格方法可极大地提高带可变形附体的船舶的阻力预报效率。
[Abstract]:In the framework of unstructured mesh segmentation, a deformed mesh technique based on Multi-Quadric interpolation is developed. Combined with CFD software STARCCM, SST turbulence model is adopted and the free surface tracing is carried out by VOF method. The deformable mesh technique is applied to the resistance prediction of a wave-piercing catamaran with appendages. The boundary motions of the baffle plate and the tail wedge are realized by the tensile deformation and slope deformation of the mesh, respectively. The working conditions of the baffle plate with the height of 4 mm / 6 mm and 8 mm and the tail wedge angle of 5 掳/ 10 掳and 15 掳are calculated. The calculation results show that the deformed mesh method has the same accuracy as the fixed mesh method, and the maximum average error of the deformed grid is about 6.67 under different working conditions, which verifies its feasibility. However, compared with the fixed mesh method, the computational time consumption of the deformable grid method can be reduced by 40%, so the resistance prediction efficiency of ships with deformable appendages can be greatly improved by using the deformable grid method.
【作者单位】： 哈尔滨工程大学船舶工程学院;
【基金】：国家自然科学基金资助(51509053)
【分类号】：O35
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本文编号：1787213