Abstract
The fin surface configuration with low energy consumption and low resistance is one of the key factors to improve the performance of bionic undulation on fin propulsion robotic fish. In this paper, we designed six kinds of vertical flow resistance reduction structure based on quarter-arc and semi-arc configurations, with their design inspiration comes from the electric elfish and turbot. After dividing the mesh, we simulated the flow on the surface of the structure. The results show that the vertical flow direction structure can improve the thickness of the boundary layer and the flow pattern in the near-wall area. When the protruding structure increase to one third of the drag-reducing size range, the drag will increase, not reduce compared with smooth surface. Three kinds of grooves designed in this paper all achieve drag reduction rates of about 3.5% when groove slope angles are 15° and 45°.
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Lu, H., Xu, M. (2023). Numerical Simulation of Bionic Undulating Fin Surface Drag Reduction Structure. In: Pan, L., Zhao, D., Li, L., Lin, J. (eds) Bio-Inspired Computing: Theories and Applications. BIC-TA 2022. Communications in Computer and Information Science, vol 1801. Springer, Singapore. https://doi.org/10.1007/978-981-99-1549-1_48
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DOI: https://doi.org/10.1007/978-981-99-1549-1_48
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