Numerical Simulation of Unsteady Hydrodynamic Characteristics of Bionic Fin

A long uncompressed fin driven by fin rays is designed in this paper, and its kinematic model is established. The SST K-ω turbulence model is used to solve the N-S equation of three-dimensional unsteady incompressible fluid, and the hydrodynamic characteristics of the uncompressed fin are studied. T...

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Bibliographic Details
Published in:Journal of physics. Conference series 2023-01, Vol.2419 (1), p.12085
Main Authors: Zhang, Minghui, Su, Yiming, Wang, Chuanbao
Format: Article
Language:English
Subjects:
Bionics
Fluid flow
Incompressible flow
Incompressible fluids
K-omega turbulence model
Karman vortex street
Kinematics
Mathematical models
Physics
Vortex streets
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Summary:A long uncompressed fin driven by fin rays is designed in this paper, and its kinematic model is established. The SST K-ω turbulence model is used to solve the N-S equation of three-dimensional unsteady incompressible fluid, and the hydrodynamic characteristics of the uncompressed fin are studied. The results show that when the undulating fin is started, the velocity of the surrounding fluid gradually increases with the movement of the fin surface, and the fluid moves from the leading edge of the undulating fin to the back edge along the fin surface. A relatively obvious anti-Karman vortex street is formed on both sides of the fin, and a jet is formed at the tail of the fin to generate forward thrust.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2419/1/012085