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FLOW-3D Analysis on Scouring around Offshore Wind Foundation

FLOW-3D를 이용한 해상풍력발전기초의 세굴 평가

  • Oh, Myoung-Hak (Coastal Engineering & Ocean Energy Research Department, Korea Ocean Research & Development Institute) ;
  • Kwon, O-Soon (Coastal Engineering & Ocean Energy Research Department, Korea Ocean Research & Development Institute) ;
  • Jeong, Weon-Mu (Coastal Engineering & Ocean Energy Research Department, Korea Ocean Research & Development Institute) ;
  • Lee, Kwang-Soo (Coastal Engineering & Ocean Energy Research Department, Korea Ocean Research & Development Institute)
  • 오명학 (한국해양연구원 연안개발.에너지연구부) ;
  • 권오순 (한국해양연구원 연안개발.에너지연구부) ;
  • 정원무 (한국해양연구원 연안개발.에너지연구부) ;
  • 이광수 (한국해양연구원 연안개발.에너지연구부)
  • Received : 2012.02.02
  • Accepted : 2012.03.08
  • Published : 2012.03.31

Abstract

In order to evaluate the local scour around offsshore wind foundation, mono pile and jacket foundation were simulated by using FLOW-3D. Numerical analysis results show that local increases of velocity around mono pile and jacket foundation was developed but velocity decreases in backward of pile and leg due to the wake vortex was observed. Local increases of velocity around foundation and scouring of jacket is more significant than that of mono pile, since jacket is the complex structure and has the interference effect with legs. Therefore, in order to evaluate the scour and design the scour protection method, the form and shape of substructures of offshore wind should be considered.

해상풍력발전기초의 국부세굴을 평가하기 위하여 3차원 수치해석인 FLOW-3D를 이용하여 모노파일과 자켓기초에 대해 해석을 수행하였다. 수치해석 결과에 의하면 모노파일과 자켓기초 레그 주위에서 국부적으로 유속이 증가하는 것으로 나타났으며, 그 후면에서는 후류 및 와류로 인하여 유속의 감소가 나타났다. 자켓기초의 경우에는 모노파일에 비해 단일 레그의 직경이 작고, 자켓레그 사이의 간섭효과 및 자켓구조물의 복잡한 형상으로 인하여 모노파일에 비하여 국부적인 유속 증가가 더 크게 나타났으며 세굴심이 더 깊게 형성되는 것으로 나타났다. 따라서, 해상풍력발전 기초의 세굴 평가 및 세굴방지공 설계시 하부구조물의 형상에 대한 고려가 필요한 것으로 판단된다.

Keywords

References

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Cited by

  1. Scour Protection Effect around the Monopile Foundation vol.20, pp.2, 2017, https://doi.org/10.7846/JKOSMEE.2017.20.2.84