Conference Paper Vibration of multiple circular cylinders in tandem alignment

Nomura, Takashi  ,  Saegusa, Nariaki  ,  Hasebe, Hiroshi  ,  野村, 卓史  ,  三枝, 成彰  ,  長谷部, 寛

There have been various attempts and investigations to capture wind energy through wind-induced vibration of some kind of structural elements. The wake galloping is one of the candidates due to its divergent nature, and the wake galloping of a single circular cylinder has been investigated in a couple of studies. However, if multiple cylinders can vibrate simultaneously, it would be favorable to capture more wind energy through the vibration. Based on this idea, a basic wind tunnel experiment has been conducted in the present study. In the present experiment, in the wake of a fixed circular cylinder, multiple circular cylinders of the same diameter as the fixed one are supported by coil springs and deployed in tandem alignment. The numbers of spring-supported cylinders are changed from 1 to 3, and the distance between their centers is another experimental parameter. As the results, two cylinders or even three cylinders vibrate together. It is worth to note that, in case that the distance between their centers is double of the cylinder diameter, the two or three cylinders vibrate in bigger amplitude than other wider distance cases though the single cylinder does not reveal wake galloping in such narrow spacing.
Meeting Information: First International Symposium on Flutter and its Application (May 15-17, 2016. Mielparque-tokyo), Minato-ku, Tokyo, Japan
Physical characteristics: Original contains color illustrations
形態: カラー図版あり

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