New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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Estimation of Fluid Force for Renewable Energy Generation Using Vortex-induced Vibrations

와류기인진동을 이용한 신재생에너지 발전에서 유체력 추정연구

  • Hongrae Park (Department of Mechanical Engineering, Keimyung University)
  • Received : 2023.03.16
  • Accepted : 2023.04.25
  • Published : 2023.06.25
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Abstract

Vortex-induced vibrations are a type of flow-induced vibrations caused by alternating lift forces. With increasing demand for renewable energy, the application of vortex-induced vibrations to renewable energy has been widely studied. Vortex-induced vibrations for aquatic clean energy (VIVACE) converter is a renewable energy device that generates electricity from rivers or oceans using vortex-induced vibrations. To increase the design life and power harnessing capacity of the VIVACE converter, the estimation of fluid forces due to vortex-induced vibrations is essential. Herein, vortex-induced vibrations were experimentally tested, and their amplitude and frequency response were measured. The amplitude results showed four different branches: initial branch, upper branch, lower branch, and desynchronization range. According to the fluid force coefficient results, the maximum lift coefficient occurred at the upper branch. Additionally, a mathematical model is proposed to estimate fluid forces due to vortex-induced vibrations without using measurement devices. This mathematical model enables the estimation of fluid force coefficients and phase lag using amplitude and frequency response of vortex-induced vibrations.

Keywords

Acknowledgement

이 연구는 2022년도 계명대학교 비사연구기금으로 이루어졌음(20220231).

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