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Proceedings Paper

Influence of bending mode shape and trailing edge deflection on propulsive performance of flexible heaving fins using digital image correlation
Author(s): Ashok K. Kancharala; Kevin Dewillie; Michael K. Philen
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Paper Abstract

The propulsive performance of flexible flapping fins greatly depends on the stiffness of the fins along with the oscillating parameters. The bending mode shape and trailing edge deflection of the oscillating fins play a major role in the generation of thrust and efficiency. This paper examines the deformation pattern of heaving flexible foils and its dependency on propulsive performance. Experimental investigation has been carried out on fins of various lengths oscillating at their leading edge. A LaVision 2D/3D StrainMaster Digital Image Correlation (DIC) system was used to measure the deformation of the fins. It is observed that the propulsive performance can be maximized by operating at frequencies close to resonance. Trailing edge amplitude and deformation pattern together play an important role in achieving high propulsive performance even when the oscillation frequency is not close to resonant frequency.

Paper Details

Date Published: 8 March 2014
PDF: 10 pages
Proc. SPIE 9055, Bioinspiration, Biomimetics, and Bioreplication 2014, 90550Q (8 March 2014); doi: 10.1117/12.2046469
Show Author Affiliations
Ashok K. Kancharala, Virginia Polytechnic Institute and State Univ. (United States)
Kevin Dewillie, Virginia Polytechnic Institute and State Univ. (United States)
Michael K. Philen, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 9055:
Bioinspiration, Biomimetics, and Bioreplication 2014
Akhlesh Lakhtakia, Editor(s)

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