On the role of surface permeability for the control of flow around a circular cylinder
The circular cylinder with porous materials coating (PMC) is studied in detail to reveal the sensitivity of surface permeability to the flow control and noise reduction. Two-dimensional simulations were firstly used to identify the critical values of permeability and thickness. Parametric study resu...
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Online Access: | https://www.jvejournals.com/article/17281 |
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doaj-337f95728f404c4fb57493e83476d8e92020-11-24T21:57:45ZengJVE InternationalJournal of Vibroengineering1392-87162538-84602016-12-011885406541510.21595/jve.2016.1728117281On the role of surface permeability for the control of flow around a circular cylinderHanru Liu0Jinjia Wei1School of Power and Energy, Northwestern Polytechnical University, Xi’an, ChinaSchool of Energy and Power, Xi’an Jiaotong University, Xi’an, ChinaThe circular cylinder with porous materials coating (PMC) is studied in detail to reveal the sensitivity of surface permeability to the flow control and noise reduction. Two-dimensional simulations were firstly used to identify the critical values of permeability and thickness. Parametric study results show that, there is a critical permeability value which produces the minimum force fluctuation and maximum noise reduction. Additionally, the porous coating can work more efficient for noise reduction with larger thickness. The further three-dimensional simulation is employed to understand the underlying physical mechanisms of flow control. The results show that the spanwise vorticity is modified more than that of other directions and behaves more synergistically. The pressure field adjacent to the cylinder surface indicates that the adverse pressure gradient is changed to the favorable pressure gradient around the porous surface which contributes partly to the vortex shedding suppression.https://www.jvejournals.com/article/17281flow controlporous materials coatingnoise and vibration reductionnumerical simulation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hanru Liu Jinjia Wei |
spellingShingle |
Hanru Liu Jinjia Wei On the role of surface permeability for the control of flow around a circular cylinder Journal of Vibroengineering flow control porous materials coating noise and vibration reduction numerical simulation |
author_facet |
Hanru Liu Jinjia Wei |
author_sort |
Hanru Liu |
title |
On the role of surface permeability for the control of flow around a circular cylinder |
title_short |
On the role of surface permeability for the control of flow around a circular cylinder |
title_full |
On the role of surface permeability for the control of flow around a circular cylinder |
title_fullStr |
On the role of surface permeability for the control of flow around a circular cylinder |
title_full_unstemmed |
On the role of surface permeability for the control of flow around a circular cylinder |
title_sort |
on the role of surface permeability for the control of flow around a circular cylinder |
publisher |
JVE International |
series |
Journal of Vibroengineering |
issn |
1392-8716 2538-8460 |
publishDate |
2016-12-01 |
description |
The circular cylinder with porous materials coating (PMC) is studied in detail to reveal the sensitivity of surface permeability to the flow control and noise reduction. Two-dimensional simulations were firstly used to identify the critical values of permeability and thickness. Parametric study results show that, there is a critical permeability value which produces the minimum force fluctuation and maximum noise reduction. Additionally, the porous coating can work more efficient for noise reduction with larger thickness. The further three-dimensional simulation is employed to understand the underlying physical mechanisms of flow control. The results show that the spanwise vorticity is modified more than that of other directions and behaves more synergistically. The pressure field adjacent to the cylinder surface indicates that the adverse pressure gradient is changed to the favorable pressure gradient around the porous surface which contributes partly to the vortex shedding suppression. |
topic |
flow control porous materials coating noise and vibration reduction numerical simulation |
url |
https://www.jvejournals.com/article/17281 |
work_keys_str_mv |
AT hanruliu ontheroleofsurfacepermeabilityforthecontrolofflowaroundacircularcylinder AT jinjiawei ontheroleofsurfacepermeabilityforthecontrolofflowaroundacircularcylinder |
_version_ |
1725853672253947904 |