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Temporal evolution of lift in a pure cruciform system for energy harvesting

We investigated the displacement and lift time series of a circular cylinder - strip plate cruciform system for energy harvesting in the Reynolds number range 1.1×103=Re=14.6×103, numerically using the open source C++ library: OpenFOAM. The Karman vortex-induced vibration (KVIV) regime was identifie...

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Main Authors: Adzlan, Ahmad, Mat Ali, Mohamed Sukri, Sheikh Ahmad Zaki, Sheikh Ahmad Zaki
Format: Article
Published: Elsevier Ltd 2021
Subjects:
T Technology (General)
Online Access:http://eprints.utm.my/id/eprint/94681/
http://dx.doi.org/10.1016/j.oceaneng.2021.108648
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spelling my.utm.946812022-03-31T15:52:11Z http://eprints.utm.my/id/eprint/94681/ Temporal evolution of lift in a pure cruciform system for energy harvesting Adzlan, Ahmad Mat Ali, Mohamed Sukri Sheikh Ahmad Zaki, Sheikh Ahmad Zaki T Technology (General) We investigated the displacement and lift time series of a circular cylinder - strip plate cruciform system for energy harvesting in the Reynolds number range 1.1×103=Re=14.6×103, numerically using the open source C++ library: OpenFOAM. The Karman vortex-induced vibration (KVIV) regime was identified between reduced velocity, U*, 2.3 and 13.6, while the streamwise vortex-induced vibration (SVIV) regime was identified between 18.2=U*=29.5. We analysed the cylinder displacement and lift time series using the Hilbert-Huang transform (HHT). Within this range of U*, Karman vortex shedding contributes nearly as much as streamwise vortex shedding to the root-mean-square amplitude of total lift, while between 25.0=U*=29.5, the Karman component contribution is on average twice that of the streamwise component. These findings hint at the possibility to improve the power output of the harvester by a factor of two between 18.2=U*=22.7 and by a factor of three between 25.0=U*=29.5, if we can unite the contribution to the root-mean-square amplitude of the total lift under a single vibration-driving mechanism: the shedding of streamwise vortex. Elsevier Ltd 2021 Article PeerReviewed Adzlan, Ahmad and Mat Ali, Mohamed Sukri and Sheikh Ahmad Zaki, Sheikh Ahmad Zaki (2021) Temporal evolution of lift in a pure cruciform system for energy harvesting. Ocean Engineering223, Ocean . p. 108648. ISSN 0029-8018 http://dx.doi.org/10.1016/j.oceaneng.2021.108648
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)
Adzlan, Ahmad
Mat Ali, Mohamed Sukri
Sheikh Ahmad Zaki, Sheikh Ahmad Zaki
Temporal evolution of lift in a pure cruciform system for energy harvesting
description We investigated the displacement and lift time series of a circular cylinder - strip plate cruciform system for energy harvesting in the Reynolds number range 1.1×103=Re=14.6×103, numerically using the open source C++ library: OpenFOAM. The Karman vortex-induced vibration (KVIV) regime was identified between reduced velocity, U*, 2.3 and 13.6, while the streamwise vortex-induced vibration (SVIV) regime was identified between 18.2=U*=29.5. We analysed the cylinder displacement and lift time series using the Hilbert-Huang transform (HHT). Within this range of U*, Karman vortex shedding contributes nearly as much as streamwise vortex shedding to the root-mean-square amplitude of total lift, while between 25.0=U*=29.5, the Karman component contribution is on average twice that of the streamwise component. These findings hint at the possibility to improve the power output of the harvester by a factor of two between 18.2=U*=22.7 and by a factor of three between 25.0=U*=29.5, if we can unite the contribution to the root-mean-square amplitude of the total lift under a single vibration-driving mechanism: the shedding of streamwise vortex.
format Article
author Adzlan, Ahmad
Mat Ali, Mohamed Sukri
Sheikh Ahmad Zaki, Sheikh Ahmad Zaki
author_facet Adzlan, Ahmad
Mat Ali, Mohamed Sukri
Sheikh Ahmad Zaki, Sheikh Ahmad Zaki
author_sort Adzlan, Ahmad
title Temporal evolution of lift in a pure cruciform system for energy harvesting
title_short Temporal evolution of lift in a pure cruciform system for energy harvesting
title_full Temporal evolution of lift in a pure cruciform system for energy harvesting
title_fullStr Temporal evolution of lift in a pure cruciform system for energy harvesting
title_full_unstemmed Temporal evolution of lift in a pure cruciform system for energy harvesting
title_sort temporal evolution of lift in a pure cruciform system for energy harvesting
publisher Elsevier Ltd
publishDate 2021
url http://eprints.utm.my/id/eprint/94681/
http://dx.doi.org/10.1016/j.oceaneng.2021.108648
_version_ 1729703206437519360
score 13.251813

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