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Turbulent burning velocity of ammonia/oxygen/nitrogen premixed flame in O₂-enriched air condition

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Title: Turbulent burning velocity of ammonia/oxygen/nitrogen premixed flame in O₂-enriched air condition
Authors: Xia, Yu Browse this author
Hashimoto, Genya Browse this author
Hadi, Khalid Browse this author
Hashimoto, Nozomu Browse this author →KAKEN DB
Hayakawa, Akihiro Browse this author →KAKEN DB
Kobayashi, Hideaki Browse this author →KAKEN DB
Fujita, Osamu Browse this author →KAKEN DB
Keywords: Premixed ammonia/oxygen/nitrogen flame
Turbulent burning velocity
Laminar burning velocity
O₂-enriched combustion
Issue Date: 15-May-2020
Publisher: Elsevier
Journal Title: Fuel
Volume: 268
Start Page: 117383
Publisher DOI: 10.1016/j.fuel.2020.117383
Abstract: Ammonia is a promising hydrogen-energy carrier as well as a carbon-free fuel. However, turbulent burning behavior of ammonia flame had yet to be sufficiently studied. In this work, laminar and turbulent burning velocities of ammonia/oxygen/nitrogen flames were investigated under the condition of oxygen enrichment. The turbulent burning velocity of ammonia/oxygen/nitrogen mixtures was found to increase with increasing turbulence intensity. The ratio of the turbulent burning velocity to stretched laminar burning velocity, Utr/UN, increased with the turbulence Karlovitz number. However, because of the diffusional–thermal instability effect, given the same turbulent Karlovitz numbers, Utr/UN in ammonia-lean cases is larger than in ammonia-rich cases. These findings indicate that consideration of the effects of diffusional–thermal instability and of the turbulence is important for the prediction of turbulent flame propagation velocity in ammonia combustion fields.
Rights: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 橋本 望

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