Xie, Y, Morsy, ME, Li, J et al. (1 more author) (2022) Intrinsic Cellular Instabilities of Hydrogen Laminar Outwardly Propagating Spherical Flames. Fuel, 327. 125149. ISSN 0016-2361
Abstract
In this study, the influences of pressure, temperature and equivalence ratio on the onset of cellular instabilities in premixed hydrogen/air laminar flames were studied using a constant volume fan-stirred combustion vessel. The onset of instability is marked by the critical stretch rate, at which the flame speed rapidly deviates from its prior response to stretch. It is noted that the critical Peclet number, Pecl, increases with increasing both equivalence ratio and temperature, indicating a more stable flame. Whilst, Pecl decreases with increasing the initial pressure due to the associated decrease in the flame speed Markstein number, Mab with increasing pressure. Empirical correlations of Pecl and Kcl, as a function of Mab, pressure, temperature, and equivalence ratio are developed and presented. Such correlations can be employed to estimate the severity of large-scale atmospheric hydrogen flames.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Author(s). This is an open access article published under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Laminar premixed flames, Onset of cellularity, Hydrogen, Instabilities, |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Jul 2022 11:30 |
Last Modified: | 25 Jun 2023 23:02 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.fuel.2022.125149 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:188789 |