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The Influence of Sea Waves on Offshore Wind Turbine Aerodynamics

Al Sam, Ali LU ; Szász, Robert-Zoltán LU and Revstedt, Johan LU (2015) In Journal of Energy Resources Technology 137(5).
Abstract
The impacts of swells on the atmospheric boundary layer (ABL) flows and by this on the standalone offshore wind turbine (WT) performance are investigated by using large eddy simulations (LES) and actuator-line techniques. At high swell to wind speed ratio, the swell-induced stress reduces the total wind stress resulting in higher wind velocity, less wind shear, and lower turbulence intensity level. These effects increase by increasing swell to wind speed ratio (C/U) and/or swell steepness. Moreover, for the same hub-height wind speed (U-hub), the presence of swells increases the turbine power extraction rate by about 3% and 8.4% for C/U-hub = 1.53 and 2.17, respectively.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Energy Resources Technology
volume
137
issue
5
publisher
American Society Of Mechanical Engineers (ASME)
external identifiers
  • wos:000360926400010
  • scopus:84938313069
ISSN
1528-8994
DOI
10.1115/1.4031005
language
English
LU publication?
yes
id
f8d627e2-79e7-4eb2-87eb-85e84ebee68b (old id 8077262)
date added to LUP
2015-10-23 10:34:12
date last changed
2017-10-01 03:09:57
@article{f8d627e2-79e7-4eb2-87eb-85e84ebee68b,
  abstract     = {The impacts of swells on the atmospheric boundary layer (ABL) flows and by this on the standalone offshore wind turbine (WT) performance are investigated by using large eddy simulations (LES) and actuator-line techniques. At high swell to wind speed ratio, the swell-induced stress reduces the total wind stress resulting in higher wind velocity, less wind shear, and lower turbulence intensity level. These effects increase by increasing swell to wind speed ratio (C/U) and/or swell steepness. Moreover, for the same hub-height wind speed (U-hub), the presence of swells increases the turbine power extraction rate by about 3% and 8.4% for C/U-hub = 1.53 and 2.17, respectively.},
  articleno    = {051209},
  author       = {Al Sam, Ali and Szász, Robert-Zoltán and Revstedt, Johan},
  issn         = {1528-8994},
  language     = {eng},
  number       = {5},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  series       = {Journal of Energy Resources Technology},
  title        = {The Influence of Sea Waves on Offshore Wind Turbine Aerodynamics},
  url          = {http://dx.doi.org/10.1115/1.4031005},
  volume       = {137},
  year         = {2015},
}