The recent global trend toward decarbonization is also occurring in the maritime industry and there is an urgent need to improve the fuel efficiency of ships. Various energy-saving devices (ESDs) are adopted for this purpose. However, because of the difference in the boundary layer thickness between full-scale and model-scale, it is difficult to estimate the actual performance of ESDs in a tank test. As a solution to overcome this difficulty, the Boundary Layer Similarity model (BLS model) is proposed in which only the stern part of the hull is extracted to shorten the model length and to make its boundary layer thickness equivalent to that of a full-scale ship. By using this BLS model, the performance of ESDs on a full-scale can be estimated in a model test. In the present paper, the applicability of the BLS model is investigated by CFD (Computational Fluid Dynamics) simulations of performance estimation of an energy-saving fin in different locations for a bulk carrier. It is found that the BLS model is capable of predicting the full-scale performance of the fins by the model-scale simulations. Moreover, the flow fields affected by the fins with the BLS model are similar to those of full-scale. It is expected that the use of the BLS model enables the prediction of the full-scale performance of ESDs in a model test.

最近全球脱碳趋势也出现在海运业，迫切需要提高船舶的燃油效率。为此，采用了各种节能装置（ESD）。然而，由于全尺寸和模型尺寸之间边界层厚度的差异，很难估计 ESD 在水箱测试中的实际性能。为了克服这一困难，提出了边界层相似模型（BLS模型），仅提取船体的船尾部分，以缩短模型长度，使其边界层厚度相当于全尺寸的边界层厚度。船。通过使用此 BLS 模型，可以在模型测试中估计 ESD 的全尺寸性能。本文通过 CFD（计算流体动力学）模拟对散货船不同位置的节能翅片的性能评估来研究 BLS 模型的适用性。通过模型尺度仿真发现，BLS 模型能够预测鳍片的全尺寸性能。此外，BLS模型中翅片对流场的影响与全尺寸流场相似。预计使用 BLS 模型能够在模型测试中预测 ESD 的全面性能。