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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/66375
Record Status
Checked
Record Id
66375
Title
Numerical investigation of the effects of fuel variability on the dynamics of syngas impinging jet flames
Contributors
D Mira Martinez
,
X Jiang
,
C Moulinec (STFC Daresbury Lab.)
,
D Emerson (STFC Daresbury Lab.)
Abstract
Numerical simulations using the Large-eddy simulation technique is presented to study the effects of fuel variability on the dynamics of hydrogen and syngas impinging flames. The compositions of CO and H2 are varied in a syngas mixture, including a pure H2 case as the baseline Case 1, 20% CO with 80% H2 for Case 2, 40% CO with 60% H2 for Case 3, and 20% CO with 20% CO2 and 60% H2 for Case 4. The impinging flame configuration has a distance to nozzle diameter ratio of H/d = 20 and the inlet velocity of the fuel is 27 m/s. The fuel is issued from a circular nozzle and mixes with air in a non-premixed configuration. The results show that the flames develop vortical structures in the primary jet associated with the buoyancy and shear layer instability, and the wall jet progresses parallel to the impinging plate forming large-scale vortex rings at different locations and strengths as a consequence of the fuel compositions. A comprehensive analysis of vortical structures in the primary and secondary jet streams, along with a description of their effects on the near-wall heat transfer and instabilities of syngas flames is presented here. Pollutant emissions and species formations are also investigated in order to gain further insight into the syngas burning characteristics for future cleaner combustion systems.
Organisation
STFC
,
SCI-COMP
,
SCI-COMP-EE
Keywords
SCI COM 2012-2013
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Fuel
103 (2013): 646-662.
doi:10.1016/j.fuel.2012.06.025
2013
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