Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/137516
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dc.contributor.author | Kildare, J.A.C. | - |
dc.contributor.author | Evans, M.J. | - |
dc.contributor.author | Proud, D.B. | - |
dc.contributor.author | Chin, R. | - |
dc.contributor.author | Tian, Z. | - |
dc.contributor.author | Medwell, P.R. | - |
dc.date.issued | 2023 | - |
dc.identifier.citation | International Journal of Hydrogen Energy, 2023; 48(52):20059-20076 | - |
dc.identifier.issn | 0360-3199 | - |
dc.identifier.issn | 1879-3487 | - |
dc.identifier.uri | https://hdl.handle.net/2440/137516 | - |
dc.description | Available online 2 March 2023 | - |
dc.description.abstract | The elevated temperature of hydrogen combustion increases the formation of thermal NO×. Moderate or intense low oxygen dilution (MILD) combustion is known to reduce NO× emissions and increase thermal efficiency. Pressure is often also used for increasing thermal efficiency. The impact that pressure has on fluid dynamics and chemical kinetics is especially relevant in MILD combustion conditions. Hydrogen jet flames issuing into a hot and vitiated coflow were imaged using OH∗ chemiluminescence at different pressures (1–7 bar) and oxygen levels (3–9% by vol.). Laminar flame simulations complemented the experiments. The observed mean radial OH∗ width increased with increased pressure, but only at O₂ content less than 9%, suggesting that pressure has greater influence on kinetics when oxygen is reduced. The integrated OH∗ signal strength remained constant at 3% coflow O₂, despite an apparent increase in flame width, suggesting a spatial broadening of the flame with pressure. Numerical results indicate that at 3–6% O₂, conditions for MILD combustion of H₂ are met across a wide range of strains and pressures, supporting the experimental observations for 3% O₂. | - |
dc.description.statementofresponsibility | Jordan A.C. Kildare, Michael J. Evans, Douglas B. Proud, Rey Chin, Zhao Tian, Paul R. Medwell | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | - |
dc.rights | © 2023 The Author(s). Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY license (http://creativecommons.org/ licenses/by/4.0/). | - |
dc.source.uri | http://dx.doi.org/10.1016/j.ijhydene.2023.02.053 | - |
dc.subject | Hydrogen combustion; MILD combustion; Jet flames; Pressure; Laminar flame calculations | - |
dc.title | Characterisation of hydrogen jet flames under different pressures with varying coflow oxygen concentrations | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.ijhydene.2023.02.053 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/FT190100552 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Kildare, J.A.C. [0000-0002-2380-5755] | - |
dc.identifier.orcid | Proud, D.B. [0000-0002-0351-5718] | - |
dc.identifier.orcid | Chin, R. [0000-0002-2709-4321] | - |
dc.identifier.orcid | Tian, Z. [0000-0001-9847-6004] | - |
dc.identifier.orcid | Medwell, P.R. [0000-0002-2216-3033] | - |
Appears in Collections: | Mechanical Engineering publications |
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File | Description | Size | Format | |
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hdl_137516.pdf | Published version | 2.92 MB | Adobe PDF | View/Open |
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