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The exploration of conventional energy resources has always been questioned because of their harsh environmental impacts. The unconventional methods to generate energy from natural resources are being considered environment-friendly. These include wind, solar, hydro, and ocean thermal energy resources. In the past few years, wind energy has become a reliable and clean energy source throughout the world. A wind turbine's annual power output is influenced by flow separation and the stall condition in a variable current speed environment. Delaying this separation process is essential to extract more power throughout the year considering the variation in the current speed. The present work investigates a novel way of inserting two types (straight and curved) of slots/tubes. The results revealed that the tube-inserted airfoil delayed the flow separation and yielded improved aerodynamic performance. The airfoil with a straight tube slot and a width of 2.5 mm yields a 48.55% increment in the CL/CD ratio compared to the base case airfoil at 15 m/s. Further, a curved slotted airfoil results in an increase of 50.89% increment in CL/CD ratio from the base case airfoil at 15 m/s.

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Aerodynamic Performance Improvement in Wind Turbine Blades with Tube-Inserted Passive Flow Control

  • 会议论文

  • 发表日期：

    2026年

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  • Yash Kaushik,
  • Kritika Umrao,
  • Sundaram Tripathi,
  • Gaurav Saini

摘要

The exploration of conventional energy resources has always been questioned because of their harsh environmental impacts. The unconventional methods to generate energy from natural resources are being considered environment-friendly. These include wind, solar, hydro, and ocean thermal energy resources. In the past few years, wind energy has become a reliable and clean energy source throughout the world. A wind turbine's annual power output is influenced by flow separation and the stall condition in a variable current speed environment. Delaying this separation process is essential to extract more power throughout the year considering the variation in the current speed. The present work investigates a novel way of inserting two types (straight and curved) of slots/tubes. The results revealed that the tube-inserted airfoil delayed the flow separation and yielded improved aerodynamic performance. The airfoil with a straight tube slot and a width of 2.5 mm yields a 48.55% increment in the CL/CD ratio compared to the base case airfoil at 15 m/s. Further, a curved slotted airfoil results in an increase of 50.89% increment in CL/CD ratio from the base case airfoil at 15 m/s.