Wind and Structures

  • 제21권1호
  • /
  • Pages.25-40
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  • 2015
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Vortex-induced reconfiguration of a tandem arrangement of flexible cylinders

  • Lee, Sang Joon (Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)) ;
  • Kim, Jeong Jae (Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)) ;
  • Yeom, Eunseop (Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH))
  • 투고 : 2014.11.19
  • 심사 : 2015.03.19
  • 발행 : 2015.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

Oscillating motions of flexible cylinders are associated to some extent with the aerodynamic response of plants. Tandem motions of reeds with flexible stems in a colony are experimentally investigated using an array of flexible cylinders made of polydimethylsiloxane (PDMS). Consecutive images of flexible cylinders subjected to oncoming wind are recorded with a high-speed camera. To quantify oscillating motions, the average bending angle and displacement of flexible cylinders are evaluated using point-tracking method and spectral analysis. The tandem motions of flexible cylinders are closely related to the flow characteristics around the cylinders. Thus, the dynamic motions of a tandem arrangement of flexible cylinders are investigated with varying numbers of cylinders arranged in-line, numbers of cylinders in a group (behaving like a single body), and Reynolds numbers (Re). When the number of cylinders in a group increases, the damping effect caused by the support of downstream cylinders is pronounced. These results would be provide useful information on the tandem-arranged design of complex structures and energy harvesting devices.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

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