CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform

Vibration is a common problem in water piping system, particularly when it involves multiple elbows. One of the sources of vibration is the turbulent flow in the system. The objective of this project paper is to investigate the mechanisms that leads to excessive vibration in the sea water discharge...

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Main Author:	Mortaza, Ahmad
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/53512/1/AhmadMortazaMKFKM2015.pdf
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id	my-utm-ep.53512
record_format	uketd_dc
spelling	my-utm-ep.535122020-07-16T07:42:24Z CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform 2015-06 Mortaza, Ahmad TJ Mechanical engineering and machinery Vibration is a common problem in water piping system, particularly when it involves multiple elbows. One of the sources of vibration is the turbulent flow in the system. The objective of this project paper is to investigate the mechanisms that leads to excessive vibration in the sea water discharge piping experienced on floating LNG platform. The model is developed to simulate the actual conditions experienced at the platform. The simulations were done using selected turbulent models, because the Reynolds’s Number at any condition within the operating envelope is more than 4000. Upon completion of the simulations, focus on excitation at the wall is critical to be done. The major mechanism of vibration is pressure difference within the fluid flow. Thus, pressure and wall shear stress acting along the pipe wall need to be analyzed to pin point whether there is any mechanism at work which will induce vibration. The results show large pressure difference was observed between the inner and outer elbows thus prompting high inclination to vibration. It was observed that higher fluctuations of velocity and pressure near the wall as the Reynolds’s number increases. The amplitudes of the fluctuations for both pressure and velocity were seen to be close to linear in nature. 2015-06 Thesis http://eprints.utm.my/id/eprint/53512/ http://eprints.utm.my/id/eprint/53512/1/AhmadMortazaMKFKM2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85659 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Mortaza, Ahmad CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform
description	Vibration is a common problem in water piping system, particularly when it involves multiple elbows. One of the sources of vibration is the turbulent flow in the system. The objective of this project paper is to investigate the mechanisms that leads to excessive vibration in the sea water discharge piping experienced on floating LNG platform. The model is developed to simulate the actual conditions experienced at the platform. The simulations were done using selected turbulent models, because the Reynolds’s Number at any condition within the operating envelope is more than 4000. Upon completion of the simulations, focus on excitation at the wall is critical to be done. The major mechanism of vibration is pressure difference within the fluid flow. Thus, pressure and wall shear stress acting along the pipe wall need to be analyzed to pin point whether there is any mechanism at work which will induce vibration. The results show large pressure difference was observed between the inner and outer elbows thus prompting high inclination to vibration. It was observed that higher fluctuations of velocity and pressure near the wall as the Reynolds’s number increases. The amplitudes of the fluctuations for both pressure and velocity were seen to be close to linear in nature.
format	Thesis
qualification_level	Master's degree
author	Mortaza, Ahmad
author_facet	Mortaza, Ahmad
author_sort	Mortaza, Ahmad
title	CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform
title_short	CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform
title_full	CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform
title_fullStr	CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform
title_full_unstemmed	CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform
title_sort	cfd modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/53512/1/AhmadMortazaMKFKM2015.pdf
_version_	1747817569993097216

CFD modeling of flow induced vibration mechanism in sea water piping on a regasification terminal platform

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