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Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture

Water hammer on transient flow of hydrogen-natural gas mixture in a horizontal pipeline is analysed to determine the relationship between pressure waves and different modes of closing and opening of valves. Four types of laws applicable to closing valve, namely, instantaneous, linear, concave, and c...

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Main Authors: Subani, Norazlina, Amin, Norsarahaida
Format: Article
Language:English
Published: Hindawi Publishing Corporation 2015
Subjects:
Q Science (General)
Online Access:http://eprints.utm.my/id/eprint/57815/1/NorazlinaSubani2015_AnalysisofWaterHammerwithDifferentClosing.pdf
http://eprints.utm.my/id/eprint/57815/
http://dx.doi.org/10.1155/2015/510675
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spelling my.utm.578152021-08-19T05:09:07Z http://eprints.utm.my/id/eprint/57815/ Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture Subani, Norazlina Amin, Norsarahaida Q Science (General) Water hammer on transient flow of hydrogen-natural gas mixture in a horizontal pipeline is analysed to determine the relationship between pressure waves and different modes of closing and opening of valves. Four types of laws applicable to closing valve, namely, instantaneous, linear, concave, and convex laws, are considered. These closure laws describe the speed variation of the hydrogen-natural gas mixture as the valve is closing. The numerical solution is obtained using the reduced order modelling technique. The results show that changes in the pressure wave profile and amplitude depend on the type of closing laws, valve closure times, and the number of polygonal segments in the closing function. The pressure wave profile varies from square to triangular and trapezoidal shape depending on the type of closing laws, while the amplitude of pressure waves reduces as the closing time is reduced and the numbers of polygonal segments are increased. The instantaneous and convex closing laws give rise to minimum and maximum pressure, respectively. Hindawi Publishing Corporation 2015 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/57815/1/NorazlinaSubani2015_AnalysisofWaterHammerwithDifferentClosing.pdf Subani, Norazlina and Amin, Norsarahaida (2015) Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture. Abstract and Applied Analysis, 2015 . ISSN 1085-3375 http://dx.doi.org/10.1155/2015/510675 DOI:10.1155/2015/510675
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/
language English
topic Q Science (General)
spellingShingle Q Science (General)
Subani, Norazlina
Amin, Norsarahaida
Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture
description Water hammer on transient flow of hydrogen-natural gas mixture in a horizontal pipeline is analysed to determine the relationship between pressure waves and different modes of closing and opening of valves. Four types of laws applicable to closing valve, namely, instantaneous, linear, concave, and convex laws, are considered. These closure laws describe the speed variation of the hydrogen-natural gas mixture as the valve is closing. The numerical solution is obtained using the reduced order modelling technique. The results show that changes in the pressure wave profile and amplitude depend on the type of closing laws, valve closure times, and the number of polygonal segments in the closing function. The pressure wave profile varies from square to triangular and trapezoidal shape depending on the type of closing laws, while the amplitude of pressure waves reduces as the closing time is reduced and the numbers of polygonal segments are increased. The instantaneous and convex closing laws give rise to minimum and maximum pressure, respectively.
format Article
author Subani, Norazlina
Amin, Norsarahaida
author_facet Subani, Norazlina
Amin, Norsarahaida
author_sort Subani, Norazlina
title Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture
title_short Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture
title_full Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture
title_fullStr Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture
title_full_unstemmed Analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture
title_sort analysis of water hammer with different closing valve laws on transient flow of hydrogen-natural gas mixture
publisher Hindawi Publishing Corporation
publishDate 2015
url http://eprints.utm.my/id/eprint/57815/1/NorazlinaSubani2015_AnalysisofWaterHammerwithDifferentClosing.pdf
http://eprints.utm.my/id/eprint/57815/
http://dx.doi.org/10.1155/2015/510675
_version_ 1709667323424538624
score 13.222552

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