Document Detail

Calculation of the upper flammability limit of methane/air mixtures at elevated pressures and temperatures.
MedLine Citation:
PMID:  17980485     Owner:  NLM     Status:  MEDLINE    
Four different numerical methods to calculate the upper flammability limit of methane/air mixtures at initial pressures up to 10 bar and initial temperatures up to 200 degrees C are evaluated by comparison with experimental data. Planar freely propagating flames are calculated with the inclusion of a radiation heat loss term in the energy conservation equation to numerically obtain flammability limits. Three different reaction mechanisms are used in these calculations. At atmospheric pressure, the results of these calculations are satisfactory. At elevated pressures, however, large discrepancies are found. The spherically expanding flame calculations only show a marginal improvement compared with the planar flame calculations. On the other hand, the application of a limiting burning velocity with a pressure dependence Su,lim approximately p(-1/2) is found to predict the pressure dependence of the upper flammability limit very well, whereas the application of a constant limiting flame temperature is found to slightly underestimate the temperature dependence of the upper flammability limit.
F Van den Schoor; F Verplaetsen; J Berghmans
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Publication Detail:
Type:  Journal Article     Date:  2007-09-29
Journal Detail:
Title:  Journal of hazardous materials     Volume:  153     ISSN:  0304-3894     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-04-08     Completed Date:  2008-07-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1301-7     Citation Subset:  IM    
Katholieke Universiteit Leuven, Department of Mechanical Engineering, Celestijnenlaan 300A, B-3000 Leuven, Belgium. <>
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MeSH Terms
Atmospheric Pressure
Hazardous Substances*
Methane / chemistry*
Reg. No./Substance:
0/Hazardous Substances; 74-82-8/Methane

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