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Extinction of premixed flames by stretch and radiative loss. (English) Zbl 0533.76115

Summary: The extinction of laminar premixed flames by stretch and radiative loss is studied for the model problem of counterflow opposed-jet combustion by using the matched asymptotic expansion technique for the highly temperature sensitive processes of radiative heat loss and large- activation-energy reaction kinetics. Explicit expressions for the critical Damköhler number at extinction are derived and the influence of upstream vs downstream heat losses assessed. Results show that stretch exerts a much stronger influence than radiative loss on flame extinction.

MSC:

76V05 Reaction effects in flows
80A25 Combustion
80A30 Chemical kinetics in thermodynamics and heat transfer
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