Applied Ocean Research, ( ISI ), Volume (42), No (42), Year (2013-8) , Pages (32-42)

Title : ( Effect of caudal on hydrodynamic performance of flapping foil in fish-like swimming )

Authors: Javad Abolfazli Esfahani , E. Barati , hamid reza karbasian ,

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In the present study the effect of caudal length on hydrodynamic performance of flapping foil is investigated. According to reality of swimming of fishes, the kinematics of their oscillation tail is involved with two rotational motions where one of them causes the tail to move in circular direction and the other leads the tail to pitch around its pitch axis. With this concept, a generalized kinematic model is considered. According to simulation of the motion trajectory of flapping foil, it is shown that the length of caudal may affect the hydrodynamic performance. It is shown that at lower and higher Strouhal numbers ( St < 0.2 and St > 0.6) the hydrodynamic performance of flapping foil is optimum when the length of caudal is infinitive. It should be noted that at higher caudal length the variation of propulsive efficiency and produced thrust are stopped and these hydrodynamic parameters are kept at constant values. Additionally, it is demonstrated that there is the possibility of improving propulsive efficiency at moderate Strouhal numbers (0.2 < St < 0.6) by manipulation of caudal length. Furthermore, it is shown that in some cases the manipulation of caudal length may increase thrust coefficient as the propulsive efficiency is also increased.

Keywords

, Flapping foil, Bio-inspired propulsion, Fish-like swimming, Hydrodynamics, Strouhal number,
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@article{paperid:1034351,
author = {Abolfazli Esfahani, Javad and E. Barati and Karbasian, Hamid Reza},
title = {Effect of caudal on hydrodynamic performance of flapping foil in fish-like swimming},
journal = {Applied Ocean Research},
year = {2013},
volume = {42},
number = {42},
month = {August},
issn = {0141-1187},
pages = {32--42},
numpages = {10},
keywords = {Flapping foil; Bio-inspired propulsion; Fish-like swimming; Hydrodynamics; Strouhal number; Caudal},
}

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%0 Journal Article
%T Effect of caudal on hydrodynamic performance of flapping foil in fish-like swimming
%A Abolfazli Esfahani, Javad
%A E. Barati
%A Karbasian, Hamid Reza
%J Applied Ocean Research
%@ 0141-1187
%D 2013

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