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实船阻力及流场数值预报方法

DOI: 10.3969/j.issn.1006??7043.201301004

Keywords: 阻力预报, 实尺度, 粗糙度, 虚拟流体粘度, 实船阻力, 流场, 数值预报

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Abstract:

为快速准确预报实船阻力及流场信息,对基于模型尺度数值计算外推方法、虚拟流体粘度方法、实尺度计算方法的阻力及流场计算结果进行了比较和分析。在傅汝德数0.15~0.41内,3种方法与船模试验值外推预报的实船阻力差分别在7%、4.5%、3.5%以内,其中虚拟流体粘度方法和实尺度计算方法均考虑了粗糙度的影响。在波形与伴流场的比较中,虚拟流体粘度方法与实尺度计算方法预报结果基本一致。虚拟流体粘度的方法能够较好预报实船的阻力和流场,且计算量最小,具有较强的工程应用价值。??

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