High-Efficiency Can Be Achieved for Non-Uniformly Flexible Pitching Hydrofoils via Tailored Collective Interactions

نویسندگان

چکیده

New experiments examine the interactions between a pair of three-dimensional (AR = 2) non-uniformly flexible pitching hydrofoils through force and efficiency measurements. It is discovered that collective improved when follower foil has nearly out-of-phase synchronization with leader located directly downstream an optimal streamwise spacing X*=0.5. The further operates nominal amplitude motion 36% larger than leader’s amplitude. A slight degradation in was measured slightly-staggered from in-line arrangement where direct vortex impingement expected. Operating at conditions, thrust are ?C=62% CT,C=0.44, which substantial improvements over ?C=29% CT,C=0.16 two fully-rigid foils isolation. This demonstrates promise achieving high-efficiency simple purely mechanical systems paves way for design bio-inspired underwater vehicles.

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ژورنال

عنوان ژورنال: Fluids

سال: 2021

ISSN: ['2311-5521']

DOI: https://doi.org/10.3390/fluids6070233