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Downstream flat plate as the flow-induced vibration enhancer for energy harvesting

The prospect of harvesting energy from flow-induced vibration using an elastic square cylinder with a detached flat plate is experimentally investigated. The feasibility of flow-induced vibration to supply an adequate base excitation for micro-scale electrical power generation is assessed through a...

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Main Authors: Maruai, N. M., Mat Ali, M. S., Ismail, M. H., Shaikh Salim, S. A. Z.
Format: Article
Published: SAGE Publications Inc. 2017
Subjects:
T Technology (General)
Online Access:http://eprints.utm.my/id/eprint/77223/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042217777&doi=10.1177%2f1077546317707877&partnerID=40&md5=3337f3cb4b197e2bda5688bea600eea1
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spelling my.utm.772232018-05-31T09:51:44Z http://eprints.utm.my/id/eprint/77223/ Downstream flat plate as the flow-induced vibration enhancer for energy harvesting Maruai, N. M. Mat Ali, M. S. Ismail, M. H. Shaikh Salim, S. A. Z. T Technology (General) The prospect of harvesting energy from flow-induced vibration using an elastic square cylinder with a detached flat plate is experimentally investigated. The feasibility of flow-induced vibration to supply an adequate base excitation for micro-scale electrical power generation is assessed through a series of wind tunnel tests. The current test model of a single square cylinder is verified through a comparable pattern of vibration amplitude response with previous experimental study and two-dimensional numerical simulations based on the unsteady Reynolds averaged Navier–Stokes (URANS). In addition, a downstream flat plate is included in the wake of the square cylinder to study the effects of wake interference upon flow-induced vibration. A downstream flat plate is introduced as the passive vibration control to enhance the magnitude of flow-induced vibration and simultaneously increases the prospect of harvesting energy from the airflow. The study is conducted by varying the gap separation between the square cylinder and flat plate for 0.1≤ G/D ≤3. The highest peak amplitude is observed for the gap G/D = 1.2 with yrms/D = 0.46 at UR = 17, which is expected to harvest ten times more energy than the single square cylinder. The high amplitude vibration response is sustained within a relatively broader range of lock-in synchronization. Meanwhile, for G/D = 2 the vibration is suppressed, which leads to a lower magnitude of harvested energy. Contrarily, the amplitude response pattern for G/D = 3 is in agreement with the single square cylinder. Hence, the flat plate has no significance to the wake interference of the square cylinder when the gap separation is beyond 3D. SAGE Publications Inc. 2017 Article PeerReviewed Maruai, N. M. and Mat Ali, M. S. and Ismail, M. H. and Shaikh Salim, S. A. Z. (2017) Downstream flat plate as the flow-induced vibration enhancer for energy harvesting. JVC/Journal of Vibration and Control . ISSN 1077-5463 (In Press) https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042217777&doi=10.1177%2f1077546317707877&partnerID=40&md5=3337f3cb4b197e2bda5688bea600eea1 DOI:10.1177/1077546317707877
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic T Technology (General)
spellingShingle T Technology (General)
Maruai, N. M.
Mat Ali, M. S.
Ismail, M. H.
Shaikh Salim, S. A. Z.
Downstream flat plate as the flow-induced vibration enhancer for energy harvesting
description The prospect of harvesting energy from flow-induced vibration using an elastic square cylinder with a detached flat plate is experimentally investigated. The feasibility of flow-induced vibration to supply an adequate base excitation for micro-scale electrical power generation is assessed through a series of wind tunnel tests. The current test model of a single square cylinder is verified through a comparable pattern of vibration amplitude response with previous experimental study and two-dimensional numerical simulations based on the unsteady Reynolds averaged Navier–Stokes (URANS). In addition, a downstream flat plate is included in the wake of the square cylinder to study the effects of wake interference upon flow-induced vibration. A downstream flat plate is introduced as the passive vibration control to enhance the magnitude of flow-induced vibration and simultaneously increases the prospect of harvesting energy from the airflow. The study is conducted by varying the gap separation between the square cylinder and flat plate for 0.1≤ G/D ≤3. The highest peak amplitude is observed for the gap G/D = 1.2 with yrms/D = 0.46 at UR = 17, which is expected to harvest ten times more energy than the single square cylinder. The high amplitude vibration response is sustained within a relatively broader range of lock-in synchronization. Meanwhile, for G/D = 2 the vibration is suppressed, which leads to a lower magnitude of harvested energy. Contrarily, the amplitude response pattern for G/D = 3 is in agreement with the single square cylinder. Hence, the flat plate has no significance to the wake interference of the square cylinder when the gap separation is beyond 3D.
format Article
author Maruai, N. M.
Mat Ali, M. S.
Ismail, M. H.
Shaikh Salim, S. A. Z.
author_facet Maruai, N. M.
Mat Ali, M. S.
Ismail, M. H.
Shaikh Salim, S. A. Z.
author_sort Maruai, N. M.
title Downstream flat plate as the flow-induced vibration enhancer for energy harvesting
title_short Downstream flat plate as the flow-induced vibration enhancer for energy harvesting
title_full Downstream flat plate as the flow-induced vibration enhancer for energy harvesting
title_fullStr Downstream flat plate as the flow-induced vibration enhancer for energy harvesting
title_full_unstemmed Downstream flat plate as the flow-induced vibration enhancer for energy harvesting
title_sort downstream flat plate as the flow-induced vibration enhancer for energy harvesting
publisher SAGE Publications Inc.
publishDate 2017
url http://eprints.utm.my/id/eprint/77223/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042217777&doi=10.1177%2f1077546317707877&partnerID=40&md5=3337f3cb4b197e2bda5688bea600eea1
_version_ 1643657533587456000
score 13.211869

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