Development and validation of a new two-dimensional wake model for wind turbine wakes

Linlin Tian, Wei Jun Zhu, Wen Zhong Shen, Ning Zhao, Zhiwei Shen

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Abstract

A new two-dimensional (2D) wake model is developed and validated in this article to predict the velocity and turbulence distribution in the wake of a wind turbine. Based on the classical Jensen wake model, this model is further employing a cosine shape function to redistribute the spread of the wake deficit in the crosswind direction. Moreover, a variable wake decay rate is proposed to take into account both the ambient turbulence and the rotor generated turbulence, different from a constant wake decay rate used in the Jensen model. The obtained results are compared to field measurements, wind tunnel experiments, and results of an advanced k-ω turbulence model as well as large eddy simulations. From the comparisons, it is found that the proposed new wake model gives a good prediction in terms of both shape and velocity amplitude of the wake deficit, especially in the far wake which is the region of interest for wind farm development projects.
Original languageEnglish
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume137
Pages (from-to)90-99
Number of pages10
ISSN0167-6105
DOIs
Publication statusPublished - 2015

Bibliographical note

This work is supported by the National Basic Research Program of China (the “973” program. 2014CB046200), NSFC (grant 91130030) and the Danish Research Council for Strategic Research (DSF sagsnr. 10-094544).

Keywords

  • Jensen wake model
  • Variable wake decay constant
  • Velocity deficit
  • Wind farm development projects
  • Wind turbine wakes
  • Decay (organic)
  • Electric utilities
  • Image segmentation
  • Large eddy simulation
  • Turbulence models
  • Wind power
  • Wind tunnels
  • Wind turbines
  • Decay constants
  • Velocity deficits
  • Wake model
  • Wind farm development
  • Wakes

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