The velocity of a premixed flame as a function of the flame stretch; An experimental study

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Combustion and Flame; (USA)

DOI:https://doi.org/10.1016/0010-2180(90)90008-F· OSTI ID:6023217

Deshaies, B; Cambray, P ^[1]

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1. Lab. d'Energetique et de Detonique, URA 193, ENSMA, 86034 Poitiers (FR)

The authors present an experimental study of the change in burning velocity of a premixed flame due to the flame curvature and (or) the rate of strain tensor of the incoming fresh mixture. Three lean propane-oxygen-nitrogen mixtures are investigated. These experimental results are compared to the theoretical prediction. As predicted by this theoretical work, the authors found that the flame burning velocity is a linear function of both the flame curvature and the gradient towards the flame front of the normal component of the velocity profile in the incoming fresh mixture, and both contribute to the stretch that the flame undergoes. Particular attention is devoted to the experimental determination of the flame burning velocity in nonuniform flow, i.e., in hydrodynamical situations where the velocity of the incoming fresh mixture has a different value at each point in space and the coefficient of proportionality between the reduced burning velocity and the reduced flame stretch, i.e., of the Markstein number.

• OSTI ID: 6023217
• Journal Information: Combustion and Flame; (USA), Journal Name: Combustion and Flame; (USA) Vol. 82:3-4; ISSN 0010-2180; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000* -- Natural Gas-- Combustion
ALKANES
CALCULATION METHODS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
ELEMENTS
FLAME PROPAGATION
HYDROCARBONS
KINETICS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXYGEN
PROPANE
REACTION KINETICS