Experimental study of flapping foil propulsion system for ships and underwater vehicles and PIV study of caudal fin propulsors

2014 ◽  
Author(s):  
M Naga Praveen Babu ◽  
P Krishnankutty ◽  
J. M. Mallikarjuna
Keyword(s):  
Experimental Study ◽  
Underwater Vehicles ◽  
Propulsion System ◽  
Caudal Fin ◽  
Flapping Foil

Experimental Study of Command Governor Adaptive Control for Unmanned Underwater Vehicles

2019 ◽  
Vol 27 (1) ◽  
pp. 332-345 ◽  
Author(s):  
Charita Darshana Makavita ◽  
Shantha Gamini Jayasinghe ◽  
Hung Duc Nguyen ◽  
Dev Ranmuthugala
Keyword(s):  
Experimental Study ◽  
Adaptive Control ◽  
Underwater Vehicles ◽  
Unmanned Underwater Vehicles

scholarly journals Comparative investigations in the effect of angle of attack profile on hydrodynamic performance of bio-inspired foil, (corrected)

2013 ◽  
Vol 10 (2) ◽  
pp. 99-108 ◽  
Author(s):  
J. A. Esfahani ◽  
E. Barati ◽  
Hamid Reza Karbasian
Keyword(s):  
Angle Of Attack ◽  
Underwater Vehicles ◽  
Hydrodynamic Performance ◽  
Profile Function ◽  
Flapping Foil ◽  
Propulsive Performance ◽  
Wide Range ◽  
Effective Angle ◽  
Thrust Production ◽  
Optimum Profile

In flapping underwater vehicles the propulsive performance of harmonically sinusoidal heaving and pitching foil will be degraded by some awkward changes in effective angle of attack profile, as the Strouhal number increases. This paper surveys different angle of attack profiles (Sinusoidal, Square, Sawtooth and Cosine) and considers their thrust production ability. In the wide range of Strouhal numbers, thrust production of Square profile is considerable but it has a discontinuity in heave velocity profile, in which an infinite acceleration exists. This problem poses a significant defect in control of flapping foil. A novel profile function is proposed to omit sharp changes in heave velocity and acceleration. Furthermore, an optimum profile is found for different Strouhal numbers with respect to Square angle of attack profile.DOI: http://dx.doi.org/10.3329/jname.v10i2.14229

Development of shape memory alloy actuated caudal fin soft robotic fish propulsion system

2021 ◽  
Author(s):  
Abel Thanagawng ◽  
Rylan King ◽  
Vasil Lakimovitch ◽  
Marius Pruessner ◽  
Lloyd Emokpae ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Propulsion System ◽  
Robotic Fish ◽  
Caudal Fin ◽  
Fish Propulsion
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