Numerical Study of the Effect of Periodic Velocity Excitation on Aerodynamic Characteristics of an Oscillating Circular Cylinder

Shinji Hiejima, T. Nomura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)269-278
Number of pages10
JournalInternational Journal of Computational Fluid Dynamics
Volume12
Issue number3-4
Publication statusPublished - 1999

Fingerprint

aerodynamic characteristics
circular cylinders
Circular cylinders
Aerodynamics
excitation
aerodynamics
Vortex flow
Damping
Finite element method
shear layers
finite element method
damping
vortices
formulations
vibration
simulation

Keywords

  • Aerodynamic instability
  • Circular cylinder
  • Finite element method
  • Periodic excitation
  • Vibration control
  • Vortex-induced vibration

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Condensed Matter Physics

Cite this

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abstract = "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.",
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T1 - Numerical Study of the Effect of Periodic Velocity Excitation on Aerodynamic Characteristics of an Oscillating Circular Cylinder

AU - Hiejima, Shinji

AU - Nomura, T.

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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