Cellular instabilities, sublimit structures and edge-flames in premixed counterflows
作者:
JohnD Buckmaster,
Mark Short,
期刊:
Combustion Theory and Modelling
(Taylor Available online 1999)
卷期:
Volume 3,
issue 1
页码: 199-214
ISSN:1364-7830
年代: 1999
DOI:10.1088/1364-7830/3/1/011
出版商: Taylor & Francis
数据来源: Taylor
摘要:
We examine twin premixed flames in a plane counterflow and uncover, in the parameter space, a hitherto unknown domain of cellular instability. This leads us to hypothesize that for small Lewis numbers a two-dimensional (2D) steady solution branch bifurcates from the one-dimensional (1D) solution branch at a neutral stability point located near the strain-induced quenching point. Solutions on this 2D branch are constructed indirectly by solving an initial-value problem in the edge-flame context defined by the multiple-valued bistable 1D solution. Three kinds of solution are found: a periodic array of flame-strings, a single isolated flame-string and a pair of interacting flame-strings. These structures can exist for values of strain greater than the 1D quenching value, corresponding to sublimit solutions.
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