논문 해외 국제일반학술지 Vortex-induced reconfiguration of a tandem arrangement of flexible cylinders
- 학술지 구분 국제일반학술지
- 게재년월 2015-07
- 저자명 Sang Joon Lee, Jeong Jae Kim, Eunseop Yeom
- 학술지명 Wind and Structures: An International Journal
- 발행처명 Techno-Press
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 3
- 연구분야 공학 > 기계공학
홈페이지논문 초록 (Abstract)
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.