考虑尾流效应的风力机组输出功率和疲劳性能模拟

Translated title of the contribution: The effect of wake flows on the output power and fatigue behavior of wind turbines

Jian Zhang, Haoran Zuo, Guokai Yuan, Songye Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The wake effect induced by upstream wind turbines in a wind farm has significant influence on the output power and fatigue behavior of downstream wind turbines. Existing studies mainly focus on the output power of wind farms based on analytical models, whereas the research on the fatigue characteristics is relatively limited. Based on the thin-shear-layer approximation of the Reynolds-averaged Navier-Stokes equations under quasi-steady-state conditions, the power efficiency and fatigue characteristics of wind turbines with different layouts in the wake zone are systematically studied via the open-source code FAST. Farm developed by the National Renewable Energy Laboratory. Results show that the variations of average wind speed and turbulence intensity do not coincide with each other. Besides, the output power of wind turbines increases proportionally with the increasing separation space. The probability distributions of wind speed in Urumqi and Xining are selected to evaluate the fatigue lifetimes of blade roots and tower bases. For blade roots, the contribution of the wake deficit to the fatigue lifetime tends to be more significant than that of the turbulence intensity. Therefore, the fatigue behavior of turbine blades in the wake zone is improved to some extent, but an apparent degradation can still be found at the position (X = 4.0D, Y = 0D), in the horizontal plane. In contrast, for tower bases, different degrees of fatigue lifetime deterioration can be found at horizontal planes except Y=1.5D. The conclusion of this paper can provide theoretical support and design reference to the layout optimization of a large-scale wind farm.

Translated title of the contributionThe effect of wake flows on the output power and fatigue behavior of wind turbines
Original languageChinese (Simplified)
Pages (from-to)210-219
Number of pages10
JournalKongqi Donglixue Xuebao/Acta Aerodynamica Sinica
Volume40
Issue number4
DOIs
Publication statusPublished - Aug 2022

Keywords

  • fatigue performance
  • output power
  • turbulence intensity
  • wake effect
  • wind speed distribution

ASJC Scopus subject areas

  • Modelling and Simulation
  • Condensed Matter Physics
  • Mechanical Engineering
  • Surfaces and Interfaces

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