Abstract
An extinction analysis was carried out for the counter flow and blunt body forward stagnation region premixed flames under two-dimensional and axially symmetrical viscous compressible laminar boundary layer approximations. A new non-dimensional similarity parameter defined as maximum local Damköhler number was adopted as an extinction criterion of premixed flames. The effects of varying the concentrations of fuel and oxidant, free stream temperature, activation energy, etc. upon this similarity parameter were examined for both flow geometries. It was concluded from present analysis that “extinction” of flames takes place at nearly constant values of the maximum Damköhler number.
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