TY - JOUR
T1 - Effect of Hole-uniformity of Shrouds on Vortex Shedding Suppression behind a Circular Cylinder
AU - Azmi, A. M.
AU - Jamil, H.
AU - Zhou, T.
PY - 2018/10/19
Y1 - 2018/10/19
N2 - A passive flow control method over a circular cylinder using perforated shrouds was computationally investigated to manipulate the unsteady wake behind the circular cylinder for vortex shedding suppression. The perforated shrouds were of 33% porosity with uniform and non-uniform holes. The computation was performed at low Reynolds number (based on the circular cylinder diameter), Re = 300. The objective of the study is to examine the effect of hole-uniformity of the perforated cylinders on the vortex shedding behind the circular cylinder. It was found that both perforated shrouds (uniform and non-uniform holes) significantly suppressed the vortex shedding behind the cylinder, although with an increased drag due to normalization according to cylinder diameter. The perforated shrouded cylinder with non-uniform holes has longer vortex formation length, suppressing vortex better than that of the uniform holes distribution. The intensity of vortices behind the shrouded cylinder wake with non-uniform holes was also considerably smaller than that of the uniform holes.
AB - A passive flow control method over a circular cylinder using perforated shrouds was computationally investigated to manipulate the unsteady wake behind the circular cylinder for vortex shedding suppression. The perforated shrouds were of 33% porosity with uniform and non-uniform holes. The computation was performed at low Reynolds number (based on the circular cylinder diameter), Re = 300. The objective of the study is to examine the effect of hole-uniformity of the perforated cylinders on the vortex shedding behind the circular cylinder. It was found that both perforated shrouds (uniform and non-uniform holes) significantly suppressed the vortex shedding behind the cylinder, although with an increased drag due to normalization according to cylinder diameter. The perforated shrouded cylinder with non-uniform holes has longer vortex formation length, suppressing vortex better than that of the uniform holes distribution. The intensity of vortices behind the shrouded cylinder wake with non-uniform holes was also considerably smaller than that of the uniform holes.
UR - http://www.scopus.com/inward/record.url?scp=85056528818&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/417/1/012036
DO - 10.1088/1757-899X/417/1/012036
M3 - Conference article
AN - SCOPUS:85056528818
SN - 1757-8981
VL - 417
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012036
T2 - 5th International Conference on Mechanics and Mechatronics Research, ICMMR 2018
Y2 - 19 July 2018 through 21 July 2018
ER -