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Cellular structure of lean hydrogen flames in microgravityDetailed, time-dependent, two-dimensional numerical simulations of premixed laminar flames have been used to study the initiation and subsequent development of cellular structures in lean hydrogen-air flames. The model includes detailed hydrogen-oxygen combustion with 24 elementary reactions of eight reactive species and a nitrogen diluent, molecular diffusion of all species, thermal conduction, viscosity, and convection. This model has been used to study the nonlinear evolution of cellular flame structure and shows that cell splitting, as observed in experiments, can be predicted numerically for sufficiently reactive mixtures. The structures that evolved also resembled the cellular structures observed in experiments. The present study shows that the 'cell-split limit' postulated from experimental observations is an intrinsic property of the mixture and that external factors such as heat losses are not necessary to cause this limit.
Document ID
19900032590
Document Type
Conference Paper
Authors
Patnaik, G.
(Berkeley Research Associates Springfield, VA, United States)
Kailasanath, K.
(U.S. Navy, Naval Research Laboratory, Washington DC, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
AIAA PAPER 90-0041
Distribution Limits
Public
Copyright
Other
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