ABSTRACT

The hydrodynamic analysis of flapping foil inspired by the thunniform fish propulsion is carried out numerically. The hydrodynamic performances of 2D and 3D rigid oscillating foils are analysed for a range of Strouhal numbers (St). The performance parameters such as thrust coefficient, power coefficient and hydrodynamic efficiency are obtained in both open water and behind ship conditions, where the wake effect of the ship influences the hydrodynamic performance parameters of the foil. Thrust and efficiency variations with Strouhal number are estimated and it is found that the efficiency reaches maximum at St = 0.3.

中文翻译：

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船体尾流对升-纵组合摆动翅片水动力性能的影响

摘要

对受鲽形鱼推进启发的扑翼水动力分析进行了数值计算。针对一系列 Strouhal 数 (St) 分析了 2D 和 3D 刚性振荡箔的流体动力学性能。推力系数、功率系数和水动力效率等性能参数是在开阔水域和后船条件下获得的，其中船舶的尾流效应会影响水翼的水动力性能参数。估计推力和效率随 Strouhal 数的变化，发现效率在 St = 0.3 时达到最大值。