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<p>There exist multiple techniques to enhance the lift production as well as overall performance and efficiency of an airfoil, co- flow jet being one of them. This approach involves creating an injection slot near the front edge, through which a jet is delivered. To uphold the conservation of mass, an equal quantity of mass is drawn in through a suction slot. This study presents a comparison of the performance of the NACA 0025 baseline Airfoil with CFJ Airfoils that have injections and suction slots. The modified airfoil is named 0025-050-125. The Airfoil CFJ has an optimal placement of injection and suction slots. Despite a comparatively lower performance, it is determined that the final lift to drag ratio improves at 25° angle of attack with a gradual 3.8% increase as the angle of attack increases and would further increase at even higher angles of attack, making this airfoil an optimal candidate for implementation in lift- enhancing devices such as flaps. Also, as the angle of attack is further increased, the lift is seen to improve 12.08% and a 1.95% reduction in drag, bringing an overall L/D to a 14.32% increase on comparison with the conventional airfoil, deeming it suitable for high angle of attack operations. This proves to be an effective geometry for co- flow jet for optimized usage during mission-specific operations such as a tiltable rotary wing configuration of UAV as a Hybrid model.</p>

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Design and investigations of aerodynamic flow analyses over aerofoils with and without innovative boundary layer injection

  • 期刊论文

  • 发表日期：

    2025年2月22日

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  • Parameshwari Soundararajan,
  • Velmurugan Thirusangu,
  • Divya Baskaran,
  • Hyden Mano Jose Antony Mary Jackulin,
  • Meghasritha Kalidass,
  • Harikrishna Aravindasan,
  • Akhila Ajith Pisharam,
  • Beena Stanislaus Arputharaj,
  • Vijayanandh Raja

摘要

There exist multiple techniques to enhance the lift production as well as overall performance and efficiency of an airfoil, co- flow jet being one of them. This approach involves creating an injection slot near the front edge, through which a jet is delivered. To uphold the conservation of mass, an equal quantity of mass is drawn in through a suction slot. This study presents a comparison of the performance of the NACA 0025 baseline Airfoil with CFJ Airfoils that have injections and suction slots. The modified airfoil is named 0025-050-125. The Airfoil CFJ has an optimal placement of injection and suction slots. Despite a comparatively lower performance, it is determined that the final lift to drag ratio improves at 25° angle of attack with a gradual 3.8% increase as the angle of attack increases and would further increase at even higher angles of attack, making this airfoil an optimal candidate for implementation in lift- enhancing devices such as flaps. Also, as the angle of attack is further increased, the lift is seen to improve 12.08% and a 1.95% reduction in drag, bringing an overall L/D to a 14.32% increase on comparison with the conventional airfoil, deeming it suitable for high angle of attack operations. This proves to be an effective geometry for co- flow jet for optimized usage during mission-specific operations such as a tiltable rotary wing configuration of UAV as a Hybrid model.