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The present paper focuses on the experimental investigation of effect of vortex generators on the aerodynamic characteristics of wind turbine blades with NACA 63(4)-021 airfoil. NACA 63(4)-021 airfoil has been used since it closely resembles the flippers of the humpback whale. The experiments had been carried out in the wind tunnel at various Reynolds numbers featuring various shapes (rectangle and triangle) of vortex generators. A series of wind tunnel experiments were performed to estimate the aerodynamic characteristics at various angles of attack ranging from 0 to 70 degrees in increments of 5 degrees at four different Reynolds numbers in the order of 105. Additionally, attempts were made to test these vortex generators on the modified biomimetic Leading-Edge Protuberance (LEP) wing. As we know that the bio-inspired Leading-Edge Protuberance Wind turbine blades exhibit stall delay characteristics owing to the non-uniform separation characteristics prevailing over the peak and the trough section of the airfoil, the effect of the vortex generators on these modified bio-inspired LEP-based wind turbine blades remains unclear. The present study aims at decoding this complex flow phenomenon induced by the LEP when influenced by the vortex generators.

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Evaluation of the Performance of Passive Flow-Controlled Wind Turbine Blades Featuring Vortex Generators

  • 会议论文

  • 发表日期：

    2025年

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  • S. Vidhya Varshini,
  • J. Jesheer Hussain,
  • S. Smrithika,
  • S. Arunvinthan

摘要

The present paper focuses on the experimental investigation of effect of vortex generators on the aerodynamic characteristics of wind turbine blades with NACA 63(4)-021 airfoil. NACA 63(4)-021 airfoil has been used since it closely resembles the flippers of the humpback whale. The experiments had been carried out in the wind tunnel at various Reynolds numbers featuring various shapes (rectangle and triangle) of vortex generators. A series of wind tunnel experiments were performed to estimate the aerodynamic characteristics at various angles of attack ranging from 0 to 70 degrees in increments of 5 degrees at four different Reynolds numbers in the order of 105. Additionally, attempts were made to test these vortex generators on the modified biomimetic Leading-Edge Protuberance (LEP) wing. As we know that the bio-inspired Leading-Edge Protuberance Wind turbine blades exhibit stall delay characteristics owing to the non-uniform separation characteristics prevailing over the peak and the trough section of the airfoil, the effect of the vortex generators on these modified bio-inspired LEP-based wind turbine blades remains unclear. The present study aims at decoding this complex flow phenomenon induced by the LEP when influenced by the vortex generators.