Control of Flow Over a Bluff Body

DOI Web Site 17 Citations
  • Haecheon Choi
    School of Mechanical and Aerospace Engineering, Institute of Advanced Machinery and Design, Seoul National University, Seoul 151-744, Korea
  • Woo-Pyung Jeon
    School of Mechanical and Aerospace Engineering, Institute of Advanced Machinery and Design, Seoul National University, Seoul 151-744, Korea
  • Jinsung Kim
    School of Mechanical and Aerospace Engineering, Institute of Advanced Machinery and Design, Seoul National University, Seoul 151-744, Korea

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<jats:p>In this review, we present control methods for flow over a bluff body such as a circular cylinder, a 2D bluff body with a blunt trailing edge, and a sphere. We introduce recent major achievements in bluff-body flow controls such as 3D forcing, active feedback control, control based on local and global instability, and control with a synthetic jet. We then classify the controls as boundary-layer controls and direct-wake modifications and discuss important features associated with these controls. Finally, we discuss some other issues such as Reynolds-number dependence, the lowest possible drag by control, and control efficiency.</jats:p>

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