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Proceedings Paper

Comparison of bio-inspired flapping foil propulsion systems with rotary propulsion
Author(s): Srikanth Dharwada; Aman Agarwal; Prabhu Rajagopal
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Paper Abstract

Conventional rotary thrusters used in underwater Remotely Operated Vehicles (ROV) suffer from disadvantages such as high noise, entangling with floating objects and limited efficiency. Our group has studied bio-inspired propulsion with a single caudal fin which overcomes some of these disadvantages. However, it still faces some problems such as low thrust density (thrust generated per unit volume of the thruster), pitch/yaw and centre of mass (COM) oscillations in the body increasing the energy cost of transport. The solution being proposed is a novel dual flapping foil arrangement actuated using a single motor which tackles the limitations of single flapping foil. Comparison of efficiency, maximum thrust and thrust density has been performed between single and dual flapping foil propulsion. Also, this solution is benchmarked against commercially available rotary thrusters. The results showed that thrust density of bioinspired propulsion was not at par with rotary thrusters. However, the efficiency obtained was comparable.

Paper Details

Date Published: 27 March 2018
PDF: 8 pages
Proc. SPIE 10593, Bioinspiration, Biomimetics, and Bioreplication VIII, 105930W (27 March 2018); doi: 10.1117/12.2291887
Show Author Affiliations
Srikanth Dharwada, Indian Institute of Technology Madras (India)
Aman Agarwal, Indian Institute of Technology Madras (India)
Prabhu Rajagopal, Indian Institute of Technology Madras (India)

Published in SPIE Proceedings Vol. 10593:
Bioinspiration, Biomimetics, and Bioreplication VIII
Akhlesh Lakhtakia, Editor(s)

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