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Title: The Soret Effect in Naturally Propagating, Premixed, Lean, Hydrogen-Air Flames

Comparatively little attention has been given to multicomponent diffusion effects in lean hydrogen-air flames, in spite of the importance of these flames in safety and their potential importance to future energy technologies. Prior direct numerical simulations either have considered only the mixture-averaged transport model, or have been limited to stabilized flames that do not exhibit the thermo-diffusive instability. The so-called full, multicomponent transport model with cross-diffusion is found to predict hotter, significantly faster flames with much faster extinction and division of cellular structures.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
935335
Report Number(s):
LBNL-669E
TRN: US200815%%654
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Proceedings of the Combustion Institute; Journal Volume: 32
Research Org:
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Sponsoring Org:
Computational Research Division
Country of Publication:
United States
Language:
English
Subject:
08; 97; DIFFUSION; FLAMES; INSTABILITY; SAFETY; TRANSPORT cellular flames, lean hydrogen flames, multicomponent transport, Soret effect, thermal diffusion