Energy Harnessing Performance of Oscillating Foil Submerged in the Wake of a Fixed Cylinder

Yongqing Luo, Houxian Wu, Shuhan Huang () and Hai Sun ()
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Yongqing Luo: Southampton Ocean Engineering Joint Institution, Harbin Engineering University, Harbin 150001, China
Houxian Wu: Southampton Ocean Engineering Joint Institution, Harbin Engineering University, Harbin 150001, China
Shuhan Huang: Qingdao Qingtie Environmental Protection Technology, Qingdao Metro, Qingdao 266000, China
Hai Sun: College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China

Energies, 2024, vol. 17, issue 8, 1-21

Abstract: The energy harnessing from flow-induced vibrations (FIV) by an oscillating foil placed tandemly behind a circular cylinder (which serves as a vortex generator) is investigated. The foil is submerged in the wake produced by the fixed cylinder and could oscillate in the direction perpendicular to the incoming flow with single-degree freedom. The spacing ratio ranges from 1.0 to 5.0. The oncoming fluid velocity is U = 1–10 m/s, corresponding to the reduced velocity U r = 3.81–38.08 and the Reynolds number Re = 9.58 × 10 3 –9.58 × 10 4 . Four harnessing damping ratios ( ζ harness = 0.0054–0.0216) are used to simulate the energy conversion conditions. The main conclusions are: (1) The optimal oscillation pattern related to the highest harnessed energy emerges as the spacing ratio close to 1.0. (2) The airflow energy converted by the foil is positively correlated with the harnessing damping ratio because the amplitude responses are similar at various harnessing damping ratios. A high velocity yields the highest harnessed power. (3) The harnessing efficiency of the foil could reach 48.89%, which is much more than that of an isolated flapping foil.

Keywords: flow-induced vibration; oscillating foil; wake; vortex shedding position; energy conversion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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