Numerical study on the vortex structure and hydrodynamic characteristics for oscillating caudal fins

被引：0
|
作者：
Su B.-Y. [1 ]
Zai S.-C. [1 ]
Bai Y.-Q. [1 ]
Zhang J. [1 ]
机构：
[1] China Ship Scientific Research Center, Wuxi
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2024年 / 28卷 / 02期
关键词：
hydrodynamic force; numerical calculation; oscillating caudal fin; vortex structure;
D O I：
10.3969/j.issn.1007-7294.2024.02.005
中图分类号：
学科分类号：
摘要：
As a typical representative of the propulsion mode of BCF (body-caudal fin), tuna swims fast, which has become one of the important biomimetic research objects.In this paper, based on spring-based smoothing model and local remeshing model, a numerical calculation method for solving RANS equations and analyzing vortex structure extraction established for the flow field of caudal fin were verified by grid independence verification, and the results were compared well with those published in the literature. The investigation on the variation of the hydrodynamic force and vortex structure with the St number shows that the vortex ring structure in the wake presents a staggered distribution in a“zigzag”shape, and that,with the increase of St number, the vortex ring structure in the wake gradually evolves from a single column to a double column, and that the thrust coefficient increases. © 2024 China Ship Scientific Research Center. All rights reserved.
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页码：220 / 228
页数：8
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