In this paper, an approach is proposed for the estimation of hydrodynamic coefficients variation as functions of Reynolds number. The variation of rotary damping linear hydrodynamic coefficients for off-design velocities is studied by simulating the rotating arm test and using computational fluid dynamics. Numerical results are validated by comparison with experimental ones reported in the literature for geometry of the well-known underwater vehicle of DARPA SUBOFF and a good agreement is observed. The numerical tool is employed to study the effects of Reynolds number on hydrodynamic coefficients. Numerical results are used for deriving proper functions that estimates hydrodynamic coefficients using truncated power series expansion along with least square method. It can be concluded that it is more appropriate to use fitted functions instead of constant values especially at low Reynolds numbers.

中文翻译：

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一种非设计速度下水下航行器水动力系数的估计方法

在本文中，提出了一种估计作为雷诺数函数的流体动力系数变化的方法。通过模拟旋转臂试验和使用计算流体动力学，研究了非设计速度下旋转阻尼线性水动力系数的变化。通过与文献中报道的 DARPA SUBOFF 著名水下航行器几何形状的实验结果进行比较，验证了数值结果，并观察到了良好的一致性。数值工具用于研究雷诺数对水动力系数的影响。数值结果用于推导使用截断幂级数展开和最小二乘法估计流体动力系数的适当函数。