CONTROL OF FLOW OVER A BLUFF BODY

By Haecheon Choi, W. Jeon, Jinsung Kim. Proceeding of Fifth International Symposium on Turbulence and Shear Flow Phenomena, 2008

1,083 citations recorded by the source corpus.

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.

Subfields: Aerospace Engineering, Computational Mechanics

View Paper: https://www.semanticscholar.org/paper/51ebbd821ad2d62c2b60fa9d789a9f74d0d04afa

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In Aerospace Engineering

In Computational Mechanics

Citations in the corpus

Coherent structures in wall-bounded turbulence (2017, methodology): “(1998), for wall-bounded flows, or Choi et al. (2008), for free-shear ones.”
Large-eddy simulation of the compressible flow past a wavy cylinder (2010, methodology): “The vortical structures in the near wake are closely associated with the dynamic characteristics on a body (Wu et al. 2007) and flow control over a bluff body (Choi et al. 2008).”
Direct numerical simulation of spatially developing turbulent boundary layers with uniform blowing or suction (2011, methodology): “Net energy saving rate achieved by different active control schemes: , Choi et al. (1994)’s opposition control (computed by Iwamoto et al.”
Feedback control of unstable steady states of flow past a flat plate using reduced-order estimators (2009, methodology): “considerable research effort on suppression of this shedding in cylinder and other bluff body wakes, using passive and active, open-loop and feedback control, as reviewed by Choi et al. (2008). Among those, some techniques are based on reduced-order models; for instance, Gillies (1998) developed mod”
Vortex shedding suppression and wake control: A review (2016, methodology): “Another classification of these methods is based on the parts of flow that are modified in control process: the boundary layer control methods and the wake control (Choi et al. 2008).”
Machine Learning Control – Taming Nonlinear Dynamics and Turbulence (2016, background): “Examples include the stabilization of the cylinder wake [226, 115, 218, 65], of the cavity ﬂow [231], of the boundary layer [172, 11], and of the channel ﬂow [29], just to name a few [43].”
Aerodynamics of Heavy Vehicles (2014, background): “Because the drag-generation mechanism and its control are much more associated with unsteady flow characteristics (Choi et al. 2008), a more systematic analysis on unsteady flow features is required.”