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<p>Wind turbine blades are critical to power generation, designed for aerodynamic efficiency and structural stability. They use airfoils with higher thickness-to-chord ratios to handle increased root area loads as blade length increases. Premature stalling in the inboard region, where stability is crucial, causes radial flow induced power losses. Vortex generators (VGs) counteract this by regulating unstable boundary layers and eliminating the need for complex control systems. VGs have the potential to mitigate power losses caused by environmental factors and blade stability issues. Understanding the sensitivity of multiple airfoils to VG-induced boundary layer changes is essential for validating their effectiveness. This study establishes VG design criteria for stall prevention in the inboard blade region, developed for airfoils at the position of maximum chord length. Computational fluid dynamics (CFD) simulations evaluate various VG placements and analyze rotor performance variations. The proposed VG criteria increase annual energy production by 1.48 % to 1.63 %, depending on average wind speeds.</p>

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Investigation of effective design and application of vortex generators for the wind turbine blades

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Heejeon Im,
  • Seongkeon Kim,
  • Bumsuk Kim

摘要

Wind turbine blades are critical to power generation, designed for aerodynamic efficiency and structural stability. They use airfoils with higher thickness-to-chord ratios to handle increased root area loads as blade length increases. Premature stalling in the inboard region, where stability is crucial, causes radial flow induced power losses. Vortex generators (VGs) counteract this by regulating unstable boundary layers and eliminating the need for complex control systems. VGs have the potential to mitigate power losses caused by environmental factors and blade stability issues. Understanding the sensitivity of multiple airfoils to VG-induced boundary layer changes is essential for validating their effectiveness. This study establishes VG design criteria for stall prevention in the inboard blade region, developed for airfoils at the position of maximum chord length. Computational fluid dynamics (CFD) simulations evaluate various VG placements and analyze rotor performance variations. The proposed VG criteria increase annual energy production by 1.48 % to 1.63 %, depending on average wind speeds.