<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Aquatic animals, which are the result of many millions of years of evolutionary optimization, are very quick, efficient, robust, and versatile. Accordingly, biologically-inspired mechanisms which emulate the movement of animals have recently become very popular. For the efficient design of a propulsion system it is very important to analyze the fluid flow in detail. CFD (Computational Fluid Dynamics) has become a powerful technique to understand the phenomena because it gives extensive information about the fluid flow characteristics.In the present work, a propulsion system consisting of an undulating fin which emulates the fish swimming was built. In order to optimize the mechanism, several undulating configurations were studied using a 3D turbulent CFD model. The thrust, drag, efficiency and hydrodynamic characteristics were analyzed. Furthermore, it was shown that the efficiency and thrust depend strongly on the oscillation frequency, amplitude and wavelength.In order to validate this CFD model, the numerically obtained thrust was successfully compared with experimental results from the laboratory mechanism.</abstract>

Aquatic animals, which are the result of many millions of years of evolutionary optimization, are very quick, efficient, robust, and versatile. Accordingly, biologically-inspired mechanisms which emulate the movement of animals have recently become very popular. For the efficient design of a propulsion system it is very important to analyze the fluid flow in detail. CFD (Computational Fluid Dynamics) has become a powerful technique to understand the phenomena because it gives extensive information about the fluid flow characteristics.In the present work, a propulsion system consisting of an undulating fin which emulates the fish swimming was built. In order to optimize the mechanism, several undulating configurations were studied using a 3D turbulent CFD model. The thrust, drag, efficiency and hydrodynamic characteristics were analyzed. Furthermore, it was shown that the efficiency and thrust depend strongly on the oscillation frequency, amplitude and wavelength.In order to validate this CFD model, the numerically obtained thrust was successfully compared with experimental results from the laboratory mechanism.

Three-dimensional cfd analysis to study the thrust and efficiency of a biologically-inspired marine propulsor

Escola Universitaria Politécnica. Universidade da Coruña

Polish Maritime Research

Aquatic animals, which are the result of many millions of years of evolutionary optimization, are very quick, efficient, robust, and versatile. Accordingly,...

Three-dimensional cfd analysis to study the thrust and efficiency of a biologically-inspired marine propulsor

Published Online: Apr 21, 2011

Page range: 10 - 16

DOI: https://doi.org/10.2478/v10012-011-0002-2

Keywords
fish swimming, marine propulsion, undulating fin, biomimetic, computational fluid dynamics, CFD

This content is open access.

Three-dimensional cfd analysis to study the thrust and efficiency of a biologically-inspired marine propulsor

Published Online: Apr 21, 2011

Page range: 10 - 16

DOI: https://doi.org/10.2478/v10012-011-0002-2

Keywordsfish swimming, marine propulsion, undulating fin, biomimetic, computational fluid dynamics, CFD

This content is open access.

Keywords
fish swimming, marine propulsion, undulating fin, biomimetic, computational fluid dynamics, CFD