Effect of pipe size on acetylene flame propagation in a closed straight pipe

The understanding of flame propagation mechanism in a tube or pipe as a function of scale is needed to describe explosion severity. Acetylene is an explosively unstable gas and will lead to a violent explosion when ignited. To achieve the goal, an experimental study of premixed acetylene/air mixture...

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Main Authors:	Siti Zubaidah, Sulaiman, R. M., Kasmani, A., Mustafa, Siti Kholijah, Abdul Mudalip, Rohaida, Che Man, Shalyda, Md Shaarani, Zatul Iffah, Mohd Arshad, N. S., Noor Azmi, N. A. M., Harinder Khan
Format:	Article
Language:	English
Published:	Penerbit UMP 2017
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/21186/ http://umpir.ump.edu.my/id/eprint/21186/ http://umpir.ump.edu.my/id/eprint/21186/ http://umpir.ump.edu.my/id/eprint/21186/1/Effect%20of%20pipe%20size%20on%20acetylene%20flame%20propagation%20in%20a%20closed%20straight%20pipe.pdf

id	ump-21186
recordtype	eprints
spelling	ump-211862018-05-25T05:55:39Z http://umpir.ump.edu.my/id/eprint/21186/ Effect of pipe size on acetylene flame propagation in a closed straight pipe Siti Zubaidah, Sulaiman R. M., Kasmani A., Mustafa Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad N. S., Noor Azmi N. A. M., Harinder Khan TP Chemical technology The understanding of flame propagation mechanism in a tube or pipe as a function of scale is needed to describe explosion severity. Acetylene is an explosively unstable gas and will lead to a violent explosion when ignited. To achieve the goal, an experimental study of premixed acetylene/air mixture at stoichiometry concentration was carried out in a closed straight pipe with different sizes of L/D (ratio of length to diameter) to examine the flame propagation mechanism. Pipes with L/D=40 and 51 were used. From the results, it was found that the smaller pipe with L/D=40 enhanced the explosion severity by a factor of 1.4 as compared to that of the bigger pipe with L/D=51. The compression effect at the end of the pipe plays an important role to attenuate the burning rate, leading to higher flame speeds and hence, increases the overpressure. In the case of L/D=40, the compression effect is more severe due to the larger expansion ratio, and this phenomenon would decrease the quenching effect and subsequently promote flame acceleration. Fast flame speeds of up to 600 m/s were measured in the smaller pipe during explosion development. From the results, it can be seen that the compression effect plays a major role in contributing to the higher burning rate and affects the overall explosion and flame speed development. Furthermore, the compression effect is more severe in the smaller pipe that leads to the detonation-like event. This mechanism and data are useful to design a safety device to minimise explosion severity. Penerbit UMP 2017 Article PeerReviewed application/pdf en cc_by http://umpir.ump.edu.my/id/eprint/21186/1/Effect%20of%20pipe%20size%20on%20acetylene%20flame%20propagation%20in%20a%20closed%20straight%20pipe.pdf Siti Zubaidah, Sulaiman and R. M., Kasmani and A., Mustafa and Siti Kholijah, Abdul Mudalip and Rohaida, Che Man and Shalyda, Md Shaarani and Zatul Iffah, Mohd Arshad and N. S., Noor Azmi and N. A. M., Harinder Khan (2017) Effect of pipe size on acetylene flame propagation in a closed straight pipe. Journal of Mechanical Engineering and Sciences (JMES), 11 (4). pp. 3095-3103. ISSN 2289-4659 (print); 2231-8380 (online) https://doi.org/10.15282/jmes.11.4.2017.12.0278 DOI: 10.15282/jmes.11.4.2017.12.0278
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Siti Zubaidah, Sulaiman R. M., Kasmani A., Mustafa Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad N. S., Noor Azmi N. A. M., Harinder Khan Effect of pipe size on acetylene flame propagation in a closed straight pipe
description	The understanding of flame propagation mechanism in a tube or pipe as a function of scale is needed to describe explosion severity. Acetylene is an explosively unstable gas and will lead to a violent explosion when ignited. To achieve the goal, an experimental study of premixed acetylene/air mixture at stoichiometry concentration was carried out in a closed straight pipe with different sizes of L/D (ratio of length to diameter) to examine the flame propagation mechanism. Pipes with L/D=40 and 51 were used. From the results, it was found that the smaller pipe with L/D=40 enhanced the explosion severity by a factor of 1.4 as compared to that of the bigger pipe with L/D=51. The compression effect at the end of the pipe plays an important role to attenuate the burning rate, leading to higher flame speeds and hence, increases the overpressure. In the case of L/D=40, the compression effect is more severe due to the larger expansion ratio, and this phenomenon would decrease the quenching effect and subsequently promote flame acceleration. Fast flame speeds of up to 600 m/s were measured in the smaller pipe during explosion development. From the results, it can be seen that the compression effect plays a major role in contributing to the higher burning rate and affects the overall explosion and flame speed development. Furthermore, the compression effect is more severe in the smaller pipe that leads to the detonation-like event. This mechanism and data are useful to design a safety device to minimise explosion severity.
format	Article
author	Siti Zubaidah, Sulaiman R. M., Kasmani A., Mustafa Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad N. S., Noor Azmi N. A. M., Harinder Khan
author_facet	Siti Zubaidah, Sulaiman R. M., Kasmani A., Mustafa Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad N. S., Noor Azmi N. A. M., Harinder Khan
author_sort	Siti Zubaidah, Sulaiman
title	Effect of pipe size on acetylene flame propagation in a closed straight pipe
title_short	Effect of pipe size on acetylene flame propagation in a closed straight pipe
title_full	Effect of pipe size on acetylene flame propagation in a closed straight pipe
title_fullStr	Effect of pipe size on acetylene flame propagation in a closed straight pipe
title_full_unstemmed	Effect of pipe size on acetylene flame propagation in a closed straight pipe
title_sort	effect of pipe size on acetylene flame propagation in a closed straight pipe
publisher	Penerbit UMP
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/21186/ http://umpir.ump.edu.my/id/eprint/21186/ http://umpir.ump.edu.my/id/eprint/21186/ http://umpir.ump.edu.my/id/eprint/21186/1/Effect%20of%20pipe%20size%20on%20acetylene%20flame%20propagation%20in%20a%20closed%20straight%20pipe.pdf
first_indexed	2023-09-18T22:30:59Z
last_indexed	2023-09-18T22:30:59Z
_version_	1777416284234842112

Effect of pipe size on acetylene flame propagation in a closed straight pipe

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