TY - JOUR
T1 - Numerical Study of the Effect of Periodic Velocity Excitation on Aerodynamic Characteristics of an Oscillating Circular Cylinder
AU - Hiejima, S.
AU - Nomura, T.
N1 - Funding Information:
This work was supported partly by the Ministry of Education, under Grant-in-Aid for Scientific Research NO. 09750557, and by the Wesco Foundation. We would like to acknowledge the generosity of these organizations.
PY - 1999
Y1 - 1999
N2 - A finite element method based on ALE formulation has been adopted in order to examine the effect of periodic velocity excitation on the aerodynamic characteristics of an oscillating circular cylinder. Periodic excitation, which was placed on the cylinder surface, stimulated the separated shear layers around the cylinder, and numerical results showed that some excitation can reduce negative damping, which is caused by unsteady lift force, and thereby stabilize the aerodynamics of the cylinder. Furthermore, the change of lift phase caused by periodic excitation seems to be important in stabilizing the aerodynamics of the cylinder. The simulation also confirmed that periodic excitation can suppress the vortex-induced vibration of the cylinder.
AB - A finite element method based on ALE formulation has been adopted in order to examine the effect of periodic velocity excitation on the aerodynamic characteristics of an oscillating circular cylinder. Periodic excitation, which was placed on the cylinder surface, stimulated the separated shear layers around the cylinder, and numerical results showed that some excitation can reduce negative damping, which is caused by unsteady lift force, and thereby stabilize the aerodynamics of the cylinder. Furthermore, the change of lift phase caused by periodic excitation seems to be important in stabilizing the aerodynamics of the cylinder. The simulation also confirmed that periodic excitation can suppress the vortex-induced vibration of the cylinder.
KW - Aerodynamic instability
KW - Circular cylinder
KW - Finite element method
KW - Periodic excitation
KW - Vibration control
KW - Vortex-induced vibration
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U2 - 10.1080/10618569908940831
DO - 10.1080/10618569908940831
M3 - Article
AN - SCOPUS:0033262702
SN - 1061-8562
VL - 12
SP - 269
EP - 278
JO - International Journal of Computational Fluid Dynamics
JF - International Journal of Computational Fluid Dynamics
IS - 3-4
ER -