Extending the diabatic surface layer wind shear profile for offshore wind energy

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)


In this research the diabatic surface layer wind shear model is extended for offshore wind energy purposes to higher altitudes based on Gryning's wind profile and the resistance functions proposed by Byun. The wind profile is in theory applicable up to the boundary layer height, which is parametrized with the Rossby-Montgommery equation. The coefficient c of the Rossby-Montgommery equation is found to be stability dependent with decreasing values up to 0.04 for stable conditions and increasing values up to 0.17 for unstable conditions. The proposed shear profile has been validated with 1 year of offshore observation data, and a significant improvement in accuracy is found compared to traditional surface layer shear profiles or power laws. The influence of adopting this extended shear profile for wind energy is analysed in terms of the kinetic energy flux and blade root fatigue loads experienced by a wind turbine. It is found that, especially for stable conditions, results deviate significantly compared to using the traditional surface layer shear profile. The kinetic energy flux decreases by up to 15%.

Original languageEnglish
Pages (from-to)96-110
Number of pages15
JournalRenewable Energy
Publication statusPublished - 1 Feb 2017


  • Atmospheric stability
  • Boundary-layer meteorology
  • Monin-Obukhov similarity theory
  • Offshore atmosphere
  • Wind energy
  • Wind profile

Fingerprint Dive into the research topics of 'Extending the diabatic surface layer wind shear profile for offshore wind energy'. Together they form a unique fingerprint.

Cite this