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Reducing drag forces acting on objects in fluid flows is important in several engineering areas. The management of flow configurations in bluff bodies including cylinders is relevant to aerospace, automotive, and marine arenas. The present work focuses on drag minimization by control surface application to a circular cylinder. Applying computational fluid dynamics experiments, the study investigates impact of the control surfaces on resulting drag characteristics with the static trailing edge located right at cylinder’s rear stagnation point. In the present study, the control surface length-to-diameter ratio is maintained at 1 and the gust frequency ranges from 0 to 1.25π rad/sec at a moderate Reynolds number in order to study overall flow behavior. For the MD 80 aircraft based on the results, there is an implication that different control surface configurations produce different degrees of drag reduction. These findings open up the possibilities of increasing the efficiency and enhancing the control surface shapes for the cylindrical bodies from the fluid side; this paper gives a theoretical reference for engineering designs in the fields where fluid–solid interaction is the key factor for success.

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Efficient Drag Reduction on Cylinders: Harnessing Control Surface to Navigate Gusty Environments*

  • 会议论文

  • 发表日期：

    2025年

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  • Sudarsan Gajula,
  • Nilotpala Bej,
  • Atal Bihari Harichandan

摘要

Reducing drag forces acting on objects in fluid flows is important in several engineering areas. The management of flow configurations in bluff bodies including cylinders is relevant to aerospace, automotive, and marine arenas. The present work focuses on drag minimization by control surface application to a circular cylinder. Applying computational fluid dynamics experiments, the study investigates impact of the control surfaces on resulting drag characteristics with the static trailing edge located right at cylinder’s rear stagnation point. In the present study, the control surface length-to-diameter ratio is maintained at 1 and the gust frequency ranges from 0 to 1.25π rad/sec at a moderate Reynolds number in order to study overall flow behavior. For the MD 80 aircraft based on the results, there is an implication that different control surface configurations produce different degrees of drag reduction. These findings open up the possibilities of increasing the efficiency and enhancing the control surface shapes for the cylindrical bodies from the fluid side; this paper gives a theoretical reference for engineering designs in the fields where fluid–solid interaction is the key factor for success.