The instability characteristics of lean premixed hydrogen and syngas flames stabilized on meso-scale bluff-body
Type
Conference PaperAuthors
Kim, Yu Jeong
Lee, Bok Jik
Im, Hong G.

KAUST Department
Clean Combustion Research CenterComputational Reacting Flow Laboratory (CRFL)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2017-01-05Permanent link to this record
http://hdl.handle.net/10754/625565
Metadata
Show full item recordAbstract
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.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.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.Conference/Event name
55th AIAA Aerospace Sciences MeetingAdditional Links
https://arc.aiaa.org/doi/10.2514/6.2017-1103ae974a485f413a2113503eed53cd6c53
10.2514/6.2017-1103