Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion
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051504_1.pdf
Description
Published version
Size
3.24 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Shroll, Andrew P
Shanbhogue, Santosh J
Ghoniem, Ahmed F
Date Issued
2012
Journal
Journal of Engineering for Gas Turbines and Power
Publisher
ASME International
Citation
Shroll, Andrew P., Santosh J. Shanbhogue, and Ahmed F. Ghoniem. "Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion." Journal of Engineering for Gas Turbines and Power-Transactions of the Asme 134 5 (2012).
Version
Final published version
Abstract
This work explores the dynamic stability characteristics of premixed CH 4/O 2/CO 2 mixtures in a 50 kW swirl stabilized combustor. In all cases, the methane-oxygen mixture is stoichiometric, with different dilution levels of carbon dioxide used to control the flame temperature (T ad). For the highest T ad's, the combustor is unstable at the first harmonic of the combustor's natural frequency. As the temperature is reduced, the combustor jumps to fundamental mode and then to a low-frequency mode whose value is well below the combustor's natural frequency, before eventually reaching blowoff. Similar to the case of CH 4/air mixtures, the transition from one mode to another is predominantly a function of the T ad of the reactive mixture, despite significant differences in laminar burning velocity and/or strained flame consumption speed between air and oxy-fuel mixtures for a given T ad. High speed images support this finding by revealing similar vortex breakdown modes and thus similar turbulent flame geometries that change as a function of flame temperature. Copyright © 2012 American Society of Mechanical Engineers.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/1.4004737
