Suppression of vortex shedding around a bluff body by feedback velocity excitation

Shinji Hiejima, Tadashi Watanabe, Takashi Nomura

Research output: Contribution to journalArticle

Abstract

A feedback control technique of vortex shedding behind a circular cylinder is investigated through two-dimensional numerical simulations. In order to suppress the vortex shedding, periodic velocity excitation is applied from the cylinder surface to the separated shear flows with a time delay and feedback gain for the fluid velocity behind the cylinder or pressure on the cylinder surface. It is shown that the feedback excitation generated by the velocity feedback method can suppress the vortex shedding considerably with appropriate time delay and feedback gain. However, the control using the pressure feedback method cannot suppress the vortex shedding effectively because of the unsteadiness of the pressure fluctuation on the cylinder surface.

Original languageEnglish
Pages (from-to)195-200
Number of pages6
JournalTheoretical and Applied Mechanics Japan
Volume55
Publication statusPublished - 2006

Fingerprint

bluff bodies
Vortex Shedding
vortex shedding
Vortex shedding
Excitation
retarding
Feedback
excitation
Time Delay
Time delay
time lag
circular cylinders
Circular Cylinder
Shear flow
Shear Flow
Circular cylinders
feedback control
shear flow
Feedback Control
Feedback control

ASJC Scopus subject areas

  • Mechanics of Materials

Cite this

Suppression of vortex shedding around a bluff body by feedback velocity excitation. / Hiejima, Shinji; Watanabe, Tadashi; Nomura, Takashi.

In: Theoretical and Applied Mechanics Japan, Vol. 55, 2006, p. 195-200.

Research output: Contribution to journalArticle

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