Effect of typical modeling assumptions for pulverized coal char combustion commonly used in commercial CFD codes

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In Computational fluid dynamic (CFD) models of pulverized coal combustion, which require the consideration of complex phenomena, simplified char combustion sub-models have become necessary for computational efficiency. There are several common assumptions embedded in pulverized char combustion modeling when using commercial CFD codes. We sought to quantify uncertainties that arise from these typical char combustion modeling assumptions based on the single-film apparent char kinetic model often used. The modeling assumptions examined include the exception of the Stefan flow effect, the depiction of CO species as the sole char oxidation product and the constant particle size with reaction progress, and the use of questionable rate parameters irrespective of the considered model concept and coal type. The calculated char mass loss and particle temperatures were investigated to evaluate these modeling assumptions.
Publisher
KOREAN SOC MECHANICAL ENGINEERS
Issue Date
2015-11
Language
English
Article Type
Article
Keywords

OXY-FUEL COMBUSTION; PARTICLE COMBUSTION; SOLID REACTIONS; CARBON-DIOXIDE; GASIFICATION; OXIDATION; GAS; ATMOSPHERE; KINETICS; FLOW

Citation

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.29, no.11, pp.4951 - 4961

ISSN
1738-494X
DOI
10.1007/s12206-015-1043-8
URI
http://hdl.handle.net/10203/205197
Appears in Collection
ME-Journal Papers(저널논문)
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