Numerical investigation of the wake flow control past a circular cylinder with Electrohydrodynamic actuator

2017 ◽  
Vol 66 ◽  
pp. 71-80 ◽  
Author(s):  
H.M. Deylami ◽  
N. Amanifard ◽  
S.S. Hosseininezhad ◽  
F. Dolati
Keyword(s):  
Circular Cylinder ◽  
Flow Control ◽  
Numerical Investigation ◽  
Wake Flow ◽  
Electrohydrodynamic Actuator

Numerical investigation of wake flow control by a splitter plate

1998 ◽  
Vol 12 (1) ◽  
pp. 123-131 ◽  
Author(s):  
Woe-Chul Park ◽  
Hiroshi Higuchi
Keyword(s):  
Flow Control ◽  
Numerical Investigation ◽  
Splitter Plate ◽  
Wake Flow

Suppression of Unsteady Vortex Shedding From a Circular Cylinder by Using a Passive Jet Flow Control Method

2014 ◽  
Author(s):  
Wenli Chen ◽  
Hui Li ◽  
Hui Hu
Keyword(s):  
Circular Cylinder ◽  
Flow Control ◽  
Stagnation Point ◽  
Vortex Shedding ◽  
Control Method ◽  
Aerodynamic Force ◽  
Jet Flow ◽  
Wake Flow ◽  
Cylinder Model ◽  
Rear Stagnation Point

A passive jet flow control method was employed to suppress the unsteady vortex shedding from a circular cylinder at the Reynolds number level of Re = (0.18∼1.1)×105. The passive jet flow control was achieved by blowing jets from the holes near the rear stagnation point of the cylinder, which are connected to the in-take holes located near the front stagnation point through channels embedded inside the cylinder. Since a part of the oncoming flow would inhale into the in-take holes, flow through the embedded channels, and blow out from the holes near the rear stagnation point to suppress/manipulate the alternating vortex shedding in the wake flow behind the circular cylinder, the present passive jet flow control method does not require any additional energy inputs for the flow control. In the present study, the aerodynamic force (i.e., both lift and drag) acting the circular cylinder model with and without the passive jet flow control were compared quantitatively at different Reynolds numbers (i.e., different inlet mean speed). It was found that, in addition to almost eliminating the fluctuations of the lift forces acting on the cylinder, the passive jet flow control method was also found to reduce the mean drag acting on the cylinder model greatly. The instantaneous vorticity distributions and corresponding streamline patterns were used to reveal the underlying physics about why and how the passive jet flow control method can be used to suppress the alternating vortex shedding and induce a symmetrical wake pattern behind the cylinder model.

The wake flow control behind a circular cylinder using ion wind

2003 ◽  
Vol 35 (6) ◽  
pp. 541-552 ◽  
Author(s):  
K. T. Hyun ◽  
C. H. Chun
Keyword(s):  
Circular Cylinder ◽  
Flow Control ◽  
Wake Flow ◽  
Ion Wind
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