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Computational study of the stability of turbulent hydrogen jet flames with methane addition

As the world predominately relies on fossil fuels to meet the current energy demands, the increasing consumption of it negatively impacts the environment. Thus, among constant search of a cleaner alternative fuel, hydrogen offers the greatest potential benefits in terms of energy supply and environm...

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Main Authors: Jaafar, Syahirah Khaliesah, Hamid, Mahar Diana
Format: Conference or Workshop Item
Published: 2021
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TP Chemical technology
Online Access:http://eprints.um.edu.my/35572/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102418285&doi=10.1088%2f1755-1315%2f673%2f1%2f012013&partnerID=40&md5=a203c606a920286e709056478b9225b7
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spelling my.um.eprints.355722023-10-24T07:46:45Z http://eprints.um.edu.my/35572/ Computational study of the stability of turbulent hydrogen jet flames with methane addition Jaafar, Syahirah Khaliesah Hamid, Mahar Diana TP Chemical technology As the world predominately relies on fossil fuels to meet the current energy demands, the increasing consumption of it negatively impacts the environment. Thus, among constant search of a cleaner alternative fuel, hydrogen offers the greatest potential benefits in terms of energy supply and environmental impacts. However, hydrogen combustion is challenged by the difficulties in its production, storage, and end-use. Therefore, another method to enhance hydrogen combustion is to use hydrogen with methane addition as fuel. This study presents the effect of methane addition on the stability of hydrogen-methane flames by performing numerical analysis. In this study, the stability parameters such as lift-off height, lift-off velocity and blow-out velocity of hydrogen-methane jet flames were tested in three different mixing configurations. The first was to inject pure methane and pure hydrogen flames to form a jet flame. The second was to premix hydrogen and methane to form a jet flame. The third was to inject methane as an annular jet with hydrogen as the centre. All three different mixing configurations shows different results in terms of its stability parameters. From the first configuration, the lift-off height of pure methane is higher than pure hydrogen. From the second configuration, as methane concentration increases, the lift-off height increases but the lift-off velocity decreases. From the third configuration, the lift-off height highly depends on the velocity of annular jet flow but weakly depends on the central hydrogen jet flow. Generally, for all the mixing configurations, the lift-off height increases linearly with jet exit velocity. © Published under licence by IOP Publishing Ltd. 2021-02 Conference or Workshop Item PeerReviewed Jaafar, Syahirah Khaliesah and Hamid, Mahar Diana (2021) Computational study of the stability of turbulent hydrogen jet flames with methane addition. In: 3rd International Conference on Smart City Innovation, ICSCI 2020, 5 - 6 August 2020, Bali. https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102418285&doi=10.1088%2f1755-1315%2f673%2f1%2f012013&partnerID=40&md5=a203c606a920286e709056478b9225b7
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Jaafar, Syahirah Khaliesah
Hamid, Mahar Diana
Computational study of the stability of turbulent hydrogen jet flames with methane addition
description As the world predominately relies on fossil fuels to meet the current energy demands, the increasing consumption of it negatively impacts the environment. Thus, among constant search of a cleaner alternative fuel, hydrogen offers the greatest potential benefits in terms of energy supply and environmental impacts. However, hydrogen combustion is challenged by the difficulties in its production, storage, and end-use. Therefore, another method to enhance hydrogen combustion is to use hydrogen with methane addition as fuel. This study presents the effect of methane addition on the stability of hydrogen-methane flames by performing numerical analysis. In this study, the stability parameters such as lift-off height, lift-off velocity and blow-out velocity of hydrogen-methane jet flames were tested in three different mixing configurations. The first was to inject pure methane and pure hydrogen flames to form a jet flame. The second was to premix hydrogen and methane to form a jet flame. The third was to inject methane as an annular jet with hydrogen as the centre. All three different mixing configurations shows different results in terms of its stability parameters. From the first configuration, the lift-off height of pure methane is higher than pure hydrogen. From the second configuration, as methane concentration increases, the lift-off height increases but the lift-off velocity decreases. From the third configuration, the lift-off height highly depends on the velocity of annular jet flow but weakly depends on the central hydrogen jet flow. Generally, for all the mixing configurations, the lift-off height increases linearly with jet exit velocity. © Published under licence by IOP Publishing Ltd.
format Conference or Workshop Item
author Jaafar, Syahirah Khaliesah
Hamid, Mahar Diana
author_facet Jaafar, Syahirah Khaliesah
Hamid, Mahar Diana
author_sort Jaafar, Syahirah Khaliesah
title Computational study of the stability of turbulent hydrogen jet flames with methane addition
title_short Computational study of the stability of turbulent hydrogen jet flames with methane addition
title_full Computational study of the stability of turbulent hydrogen jet flames with methane addition
title_fullStr Computational study of the stability of turbulent hydrogen jet flames with methane addition
title_full_unstemmed Computational study of the stability of turbulent hydrogen jet flames with methane addition
title_sort computational study of the stability of turbulent hydrogen jet flames with methane addition
publishDate 2021
url http://eprints.um.edu.my/35572/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102418285&doi=10.1088%2f1755-1315%2f673%2f1%2f012013&partnerID=40&md5=a203c606a920286e709056478b9225b7
_version_ 1781704484436574208
score 13.211869

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