Li, J. orcid.org/0000-0002-5995-0487, Xie, Y., Elsayed Morsy, M. et al. (1 more author) (Cover date: 15 May 2024) Laminar burning Velocities, Markstein numbers and cellular instability of spherically propagation Ethane/Hydrogen/Air premixed flames at elevated pressures. Fuel, 364. 131078. ISSN 0016-2361
Abstract
Laminar flame characteristics of ethane/hydrogen/air (with = 25 %, 50 %, 75 % and 100 % by volume) within an equivalence ratio from 0.7 to 1.3 were determined in a spherical constant volume combustion vessel at elevated pressure up to 0.5 MPa, temperature up to 360 K. Key combustion characteristics such laminar burning velocity, Markstein length/number, flame thickness, effective Lewis number, thermal expansion coefficient and critical conditions at the onset of cellular instability including critical radius and Peclet number, were either measured or calculated. These measurements were compared with the available literature data and with the predictions from chemical kinetics mechanisms, showing perfect fitting with the literature data, although the kinetics were overpredicted at a temperature of 360 K. The dependence of the ethane/hydrogen/air laminar burning velocities on temperature, pressure, and hydrogen ratio was analyzed using a datum empirical expression and blending law, yielding excellent agreement. A general correlation, based on the Peclet number against the Markstein number, has been proposed for various mixtures and conditions, aimed at defining the stable and unstable regimes of flame propagation. This correlation exhibits an value of 0.82, signifying a strong predictive capacity. The findings highlight that, compared with methane, ethane plays a promising role in enhancing the resistance of hydrogen mixtures to cellular flame instability, thereby fostering more stable flame propagation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Authors. This is an open access article 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 flame, Laminar burning velocities, Ethane-Hydrogen blends, Cellular instabilities, Markstein length |
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) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/W002299/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Mar 2024 10:47 |
Last Modified: | 06 Mar 2024 10:47 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.fuel.2024.131078 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:209952 |