Hydrodynamic performance analysis of flapping hydrofoil for single-body architecture wave glider

Sang, Hongqiang; Liu, Gang; Sun, Xiaoyun; Li, Can; Wang, Lei; Wang, Liwei

doi:10.1016/j.oceaneng.2022.112118

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…The variation of displacement against time is in agreement with the numerical results from Xing et al 22 . A similar trend in advance speed (displacement) was observed for a semi-passive foil 15 .…”

Section: B Dynamic Pose and Pathsupporting

confidence: 79%

“…Multi-harmonic signals were detected via spectral analysis of motion responses 12,13 . The pitch angle or flapping amplitude directly displays the passive pitch foil's dynamic motion, which is found to decrease as the spring stiffness becomes larger 10,[14][15][16] . As major parameters that reveal the foil's propulsion performance, the angle of attack, thrust coefficient, and advance speed are shown to relate to spring stiffness, and more specifically, an optimal stiffness exists to maximize performance 10,14,15 .…”

Section: Introductionmentioning

confidence: 99%

“…The pitch angle or flapping amplitude directly displays the passive pitch foil's dynamic motion, which is found to decrease as the spring stiffness becomes larger 10,[14][15][16] . As major parameters that reveal the foil's propulsion performance, the angle of attack, thrust coefficient, and advance speed are shown to relate to spring stiffness, and more specifically, an optimal stiffness exists to maximize performance 10,14,15 . In addition, the foil's dynamic mechanism, including motion trajectory 14 , within a period was comprehensively analyzed 16 .…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of dynamic response of passive flapping hydrofoil in regular wave

et al. 2023

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The hydrofoil harnesses wave energy and converts it into thrust. In this paper, we present the results of the first experimental study investigating the dynamic behavior of a fully passive foil with spring-loaded pitch and heave in regular waves. Our study shows that the real-time load signal is multi-harmonic with strong superposition, directly proving the robust energy harvesting performance due to the restoring springs. By interpreting the hydrofoil's pose and path from an image sequence captured underwater, we conclude the dynamic evolution of the fully passive hydrofoil interacting with regular waves. The hydrofoil's dynamics exhibit asymmetric surge, pitch, and heave in a motion cycle. Furthermore, we employ a pixel capturing algorithm with self-correction utility to quantify the hydrofoil's forward displacement from the image sequence of the moving carriage. These findings provide valuable insight into the performance and potential of hydrofoils for marine propulsion.

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Section: B Dynamic Pose and Pathsupporting

confidence: 79%