Active control of the wake behind the cylinder
1 Institute of Thermomechanics, The Czech Academy of Sciences, Prague, Czech Republic
2 Czech Technical University, Faculty of Mechanical Engineering, 166 07 Prague, Czech Republic
3 VZLÚ, Beranových 130, 199 05 Prague – Letňany
* Corresponding author: firstname.lastname@example.org
Published online: 12 May 2017
Active control of the flow around a circular cylinder using a synthetic jet (SJ) array was experimentally investigated in a small wind tunnel. The prevailing method was flow visualization. Modification of the wake was investigated at two values of a dimensionless momentum coefficient (Cμ = 0.21 and 1.02). Various α and Cf parameters were tested (where α is the angle between SJs and the main flow direction and Cf is the frequency ratio). It was found that the control moves a separation point more downstream, i.e. the width of the wake can be reduced. Moreover, increasing frequency ratio Cf causes refining of the vortex structure. When the SJs are placed at the front or rear stagnation points, the wake tends towards the symmetrical pattern.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.