8 March 2014 Influence of bending mode shape and trailing edge deflection on propulsive performance of flexible heaving fins using digital image correlation
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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.
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Ashok K. Kancharala, Ashok K. Kancharala, Kevin Dewillie, Kevin Dewillie, Michael K. Philen, Michael K. Philen, } "Influence of bending mode shape and trailing edge deflection on propulsive performance of flexible heaving fins using digital image correlation", Proc. SPIE 9055, Bioinspiration, Biomimetics, and Bioreplication 2014, 90550Q (8 March 2014); doi: 10.1117/12.2046469; https://doi.org/10.1117/12.2046469
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