Wind and Structures

  • 제21권3호
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  • Pages.289-309
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  • 2015
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Numerical study of wind profiles over simplified water waves

  • Cao, Shuyang (State Key Lab for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Zhang, Enzhen (School of Civil Engineering, Tongji University) ;
  • Sun, Liming (Tongji Architectural Design (Group) Co. Ltd.) ;
  • Cao, Jinxin (State Key Lab for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2015.02.11
  • 심사 : 2015.07.24
  • 발행 : 2015.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Vertical profiles of mean and fluctuating wind velocities over water waves were studied, by performing Large-Eddy Simulations (LES) on a fully developed turbulent boundary layer over simplified water waves. The water waves were simplified to two-dimensional, periodic and non-evolving. Different wave steepness defined by $a/{\lambda}$ (a : wave amplitude; ${\lambda}$ : wavelength) and wave age defined by $c/U_b$ (c: phase velocity of the wave; $U_b$ : bulk velocity of the air) were considered, in order to elaborate the characteristics of mean and fluctuating wind profiles. Results shows that, compared to a static wave, a moving wave plays a lesser aerodynamic role as roughness as it moves downstream slower or a little faster than air, and plays more aerodynamic roles when it moves downstream much faster than air or moves in the opposite direction to air. The changes of gradient height, power law index, roughness length and friction velocity with wave age and wave amplitude are presented, which shed light on the wind characteristics over real sea surfaces for wind engineering applications.

키워드

과제정보

연구 과제 주관 기관 : Natural Science Foundation of China

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피인용 문헌

  1. Numerical simulations of mountain winds in an alpine valley vol.24, pp.6, 2017, https://doi.org/10.12989/was.2017.24.6.565