New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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CFD Analysis for Determining Surge-direction Drag Coefficient of FOWT based on Simulation Time Step

시뮬레이션 시간 단계에 따른 FOWT 서지방향 항력계수 결정에 관한 CFD해석 연구

  • Ho-Seong Yang (Center for Offshore wind and Green hydrogen Ammonia Research, Korea Maritime and Ocean University) ;
  • Young-Ho Lee (Center for Offshore wind and Green hydrogen Ammonia Research, Korea Maritime and Ocean University)
  • 양호성 ;
  • 이영호
  • Received : 2024.04.04
  • Accepted : 2024.05.08
  • Published : 2024.06.25
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Abstract

In this study, the effect of the time step specified in a computational fluid dynamics (CFD) simulation on load response is analyzed and the drag coefficients of the floating body of floating offshore wind turbines (FOWTs) are estimated. By evaluating the error in the FOWT load response and the change in the drag-coefficient values based on the density of the time intervals, this study aims to establish a time-interval setting that minimizes the time and cost of CFD simulations for selecting drag-coefficient values. Practical CFD utilization strategies necessary for the calibration of medium-to high-fidelity analysis tools are presented. Based on a comparative analysis of CFD simulations conducted at various time intervals, the results confirmed that under a certain time interval that sufficiently considers various factors, the accuracy of the FOWT response with respect to density shows minimal differences, thereby providing an efficient utilization method for CFD simulations in FOWT design and analysis.

Keywords

Acknowledgement

본 연구는 2024년도 산업통상자원부의 재원으로 한국에너지기술평가원의 에너지기술개발사업-신재생에너지핵심기술개발사업의 일환으로 수행되었습니다(과제번호 : 20213000000030).

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