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Numerical analysis of confined and unconfined hydrogen turbulent flames
Author(s) -
İlbaş Mustafa,
Özkan Mustafa
Publication year - 2012
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.1890
Subject(s) - nox , combustion , turbulence , hydrogen , computational fluid dynamics , jet (fluid) , mechanics , environmental science , chemistry , physics , organic chemistry
SUMMARY In this study, CFD modelling of confined and unconfined turbulent jet flames were carried out. Investigations were performed for different air : fuel ratios including stoichiometric conditions. Confined and unconfined combustions of hydrogen were investigated for different power inputs. As the combustion chamber is cylindrical and axisymmetrical, CFD modelling was made two dimensional and axisymmetrical. As a result of the modelling, temperature distributions, velocity distributions and gas concentrations including NO x emissions were obtained. It is shown that maximum temperature and maximum NO x emissions occur at the confined condition of hydrogen combustion. It is also shown that the value of NO x emissions in low‐temperature zones are less than the value of NO x emissions in high‐temperature zones in all combustion conditions. Copyright © 2011 John Wiley & Sons, Ltd.