Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate
A rectangular cylinder in a fluid flow is known to show complicated cross-flow vibration behavior due to the interaction between the Kármán vortex-induced vibration and galloping. Wind tunnel experiments were carried out to investigate the cross-flow vibration behavior of several rectangular cylinde...
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2021
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my.utm.950552022-04-29T22:23:36Z http://eprints.utm.my/id/eprint/95055/ Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate Mohamed, Azhar Sheikh Ahmad Zaki, Sheikh Ahmad Zaki Shirakashi, Masataka Mat Ali, Mohamed Sukri Samsudin, Muhammad Zulfahmi T Technology (General) A rectangular cylinder in a fluid flow is known to show complicated cross-flow vibration behavior due to the interaction between the Kármán vortex-induced vibration and galloping. Wind tunnel experiments were carried out to investigate the cross-flow vibration behavior of several rectangular cylinders for which different stream-wise lengths, B and a fixed cross-flow height, D were used to define the side ratio, B/D of 1.0, 1.2, 1.4, and 1.6. For the isolated cylinder, stronger interaction between KVIV and galloping was demonstrated as the B/D was increased. The placement of a downstream square plate at a gap, S from the cylinder had a significant effect on the peak of VIV, AVIV of the cylinder. With the downstream square plate at S/D ?= ?1.17, the AVIV was enhanced about five times than that of the isolated cylinder (B/D ?= ?1.0). In contrast, the AVIV was suppressed by about 50% for two cylinders, B/D ?= ?1.2 and 1.6, with S/D ?= ?1.15 and 2.12, respectively. However, galloping was significantly enhanced for two cylinders, B/D ?= ?1.2 and 1.4 with S/D ?= ?1.15. These findings are useful to develop a vibration control technique crucial to avoid hazardous vibrations or to induce vibrations for beneficial purposes. Elsevier B.V. 2021 Article PeerReviewed Mohamed, Azhar and Sheikh Ahmad Zaki, Sheikh Ahmad Zaki and Shirakashi, Masataka and Mat Ali, Mohamed Sukri and Samsudin, Muhammad Zulfahmi (2021) Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate. Journal of Wind Engineering and Industrial Aerodynamics, 211 . p. 104563. ISSN 0167-6105 http://dx.doi.org/10.1016/j.jweia.2021.104563 |
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T Technology (General) Mohamed, Azhar Sheikh Ahmad Zaki, Sheikh Ahmad Zaki Shirakashi, Masataka Mat Ali, Mohamed Sukri Samsudin, Muhammad Zulfahmi Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate |
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A rectangular cylinder in a fluid flow is known to show complicated cross-flow vibration behavior due to the interaction between the Kármán vortex-induced vibration and galloping. Wind tunnel experiments were carried out to investigate the cross-flow vibration behavior of several rectangular cylinders for which different stream-wise lengths, B and a fixed cross-flow height, D were used to define the side ratio, B/D of 1.0, 1.2, 1.4, and 1.6. For the isolated cylinder, stronger interaction between KVIV and galloping was demonstrated as the B/D was increased. The placement of a downstream square plate at a gap, S from the cylinder had a significant effect on the peak of VIV, AVIV of the cylinder. With the downstream square plate at S/D ?= ?1.17, the AVIV was enhanced about five times than that of the isolated cylinder (B/D ?= ?1.0). In contrast, the AVIV was suppressed by about 50% for two cylinders, B/D ?= ?1.2 and 1.6, with S/D ?= ?1.15 and 2.12, respectively. However, galloping was significantly enhanced for two cylinders, B/D ?= ?1.2 and 1.4 with S/D ?= ?1.15. These findings are useful to develop a vibration control technique crucial to avoid hazardous vibrations or to induce vibrations for beneficial purposes. |
format |
Article |
author |
Mohamed, Azhar Sheikh Ahmad Zaki, Sheikh Ahmad Zaki Shirakashi, Masataka Mat Ali, Mohamed Sukri Samsudin, Muhammad Zulfahmi |
author_facet |
Mohamed, Azhar Sheikh Ahmad Zaki, Sheikh Ahmad Zaki Shirakashi, Masataka Mat Ali, Mohamed Sukri Samsudin, Muhammad Zulfahmi |
author_sort |
Mohamed, Azhar |
title |
Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate |
title_short |
Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate |
title_full |
Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate |
title_fullStr |
Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate |
title_full_unstemmed |
Experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate |
title_sort |
experimental investigation on vortex-induced vibration and galloping of rectangular cylinders of varying side ratios with a downstream square plate |
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Elsevier B.V. |
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2021 |
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http://eprints.utm.my/id/eprint/95055/ http://dx.doi.org/10.1016/j.jweia.2021.104563 |
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13.18916 |