The instability characteristics of lean premixed hydrogen and syngas flames stabilized on meso-scale bluff-body

Handle URI:
http://hdl.handle.net/10754/625565
Title:
The instability characteristics of lean premixed hydrogen and syngas flames stabilized on meso-scale bluff-body
Authors:
Kim, Yu Jeong; Lee, Bok Jik; Im, Hong G. ( 0000-0001-7080-1266 )
Abstract:
Bluff-body flame stabilization has been used as one of main flame stabilization schemes to improve combustion stability in both large and small scale premixed combustion systems. The detailed investigation of instability characteristics is needed to understand flame stability mechanism. Direct numerical simulations are conducted to investigate flame dynamics on the instability of lean premixed hydrogen/air and syngas/air flames stabilized on a meso-scale bluff-body. A two-dimensional channel of 10 mm height and 10 mm length with a square bluff-body stabilizer of 0.5 mm is considered. The height of domain is chosen as an unconfined condition to minimize the effect of the blockage ratio. Flame/flow dynamics are observed by increasing the mean inflow velocity from a steady stable to unsteady asymmetrical instability, followed by blowoff. Detailed observations between hydrogen and syngas flames with a time scale analysis are presented.
KAUST Department:
Clean Combustion Research Center
Citation:
Kim YJ, Lee BJ, Im HG (2017) The instability characteristics of lean premixed hydrogen and syngas flames stabilized on meso-scale bluff-body. 55th AIAA Aerospace Sciences Meeting. Available: http://dx.doi.org/10.2514/6.2017-1103.
Publisher:
American Institute of Aeronautics and Astronautics
Journal:
55th AIAA Aerospace Sciences Meeting
Conference/Event name:
55th AIAA Aerospace Sciences Meeting
Issue Date:
5-Jan-2017
DOI:
10.2514/6.2017-1103
Type:
Conference Paper
Sponsors:
This work has been sponsored by King Abdullah University of Science and Technology (KAUST). The simulations utilized computing resources at KAUST Supercomputing Laboratory and Research Computing.
Additional Links:
https://arc.aiaa.org/doi/10.2514/6.2017-1103
Appears in Collections:
Conference Papers; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Yu Jeongen
dc.contributor.authorLee, Bok Jiken
dc.contributor.authorIm, Hong G.en
dc.date.accessioned2017-10-03T12:49:26Z-
dc.date.available2017-10-03T12:49:26Z-
dc.date.issued2017-01-05en
dc.identifier.citationKim YJ, Lee BJ, Im HG (2017) The instability characteristics of lean premixed hydrogen and syngas flames stabilized on meso-scale bluff-body. 55th AIAA Aerospace Sciences Meeting. Available: http://dx.doi.org/10.2514/6.2017-1103.en
dc.identifier.doi10.2514/6.2017-1103en
dc.identifier.urihttp://hdl.handle.net/10754/625565-
dc.description.abstractBluff-body flame stabilization has been used as one of main flame stabilization schemes to improve combustion stability in both large and small scale premixed combustion systems. The detailed investigation of instability characteristics is needed to understand flame stability mechanism. Direct numerical simulations are conducted to investigate flame dynamics on the instability of lean premixed hydrogen/air and syngas/air flames stabilized on a meso-scale bluff-body. A two-dimensional channel of 10 mm height and 10 mm length with a square bluff-body stabilizer of 0.5 mm is considered. The height of domain is chosen as an unconfined condition to minimize the effect of the blockage ratio. Flame/flow dynamics are observed by increasing the mean inflow velocity from a steady stable to unsteady asymmetrical instability, followed by blowoff. Detailed observations between hydrogen and syngas flames with a time scale analysis are presented.en
dc.description.sponsorshipThis work has been sponsored by King Abdullah University of Science and Technology (KAUST). The simulations utilized computing resources at KAUST Supercomputing Laboratory and Research Computing.en
dc.publisherAmerican Institute of Aeronautics and Astronauticsen
dc.relation.urlhttps://arc.aiaa.org/doi/10.2514/6.2017-1103en
dc.titleThe instability characteristics of lean premixed hydrogen and syngas flames stabilized on meso-scale bluff-bodyen
dc.typeConference Paperen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journal55th AIAA Aerospace Sciences Meetingen
dc.conference.date2017-01-09 to 2017-01-13en
dc.conference.name55th AIAA Aerospace Sciences Meetingen
dc.conference.locationGrapevine, TX, USAen
kaust.authorKim, Yu Jeongen
kaust.authorLee, Bok Jiken
kaust.authorIm, Hong G.en
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