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Divergent vibration of a test cylinder with a control cylinder at the rear

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Abstract

The objective of this study was to experimentally investigate flow-induced vibration occurring in a test cylinder capable of free vibration when there was a control cylinder with a diameter half of that of the test cylinder behind the test cylinder. This paper intensively investigated divergent vibration among flow-induced vibration characteristics of the test cylinder. The mechanism for generating divergent vibration was also determined. To clarify the mechanism, flow-induced vibration characteristics of the test cylinder and wakes were investigated when the control cylinder was located closely to the rear of the test cylinder. Among tests for investigating wakes, a visualization test was also conducted using hydrogen bubble as a dye in a water channel. As a result, it was found that when the control cylinder was in close proximity to the rear of the test cylinder, the divergent vibration that appeared in the test cylinder was divided into three patterns based on vibration amplitude characteristics. Results of wake investigation revealed that the presence of the control cylinder affected the emission frequency, shape, and intensity of the vortex discharged from the test cylinder, which in turn affected vibration characteristics of the test cylinder. As a result of investigating flow-induced vibration characteristics of the test cylinder using different methods by changing the flow velocity, vibration inertia was found to one cause for the divergent vibration of the cylinder.

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Authors and Affiliations

  1. School of Mechanical System Engineering, Kangwon National University, Jungang-ro 346, Samcheok, Korea

    Sang-Il Kim

  2. Division of Electrical, Control & Instrumentation Engineering, Kangwon National University, Jungang-ro 346, Samcheok, Korea

    Bo-Kyu Kwon

Authors
  1. Sang-Il Kim
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  2. Bo-Kyu Kwon
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Corresponding author

Correspondence to Bo-Kyu Kwon.

Additional information

Sang-Il Kim received his Ph.D. from Kitami Institute of Technology in Japan, in 2007. He worked in TOYOTA AISIN SEIKI CO. Ltd. in Japan, for 2008 - 2010. Currently, he is an Associate Professor of School of Mechanical System Engineering, Kangwon National University.

Bo-Kyu Kwon received his Ph.D. degrees in School of Electrical Engineering and Computer Science from Seoul National University (SNU), Korea in 2008. For 2008–2010, he was with Samsung Heavy Industries as a Senior Research Engineer. He is currently an Associate Professor of Division of Electrical, Control & Instrumentation Engineering, Kangwon National University, Korea.

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Kim, SI., Kwon, BK. Divergent vibration of a test cylinder with a control cylinder at the rear. J Mech Sci Technol 36, 225–234 (2022). https://doi.org/10.1007/s12206-021-1221-9

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  • DOI: https://doi.org/10.1007/s12206-021-1221-9

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