Finding the Markstein number using the measurements of expanding spherical laminar flames

Journal Article · Thu May 01 04:00:00 EDT 1997 · Combustion and Flame

DOI:https://doi.org/10.1016/S0010-2180(96)00166-6· OSTI ID:543415

Karpov, V P ^[1]; Lipatnikov, A N ^[2]; Wolanski, P ^[3]

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1. Russian Academy of Sciences, Moscow (Russian Federation). Inst. of Chemical Physics
2. Chalmers Univ., Goeteborg (Sweden)
3. Warsaw Univ. of Technology (Poland). Inst. of Heat Engineering

Dependencies of the radii of expanding spherical flames on time elapsed after spark ignition have been measured using a high-speed Schlieren technique in a constant volume bomb. These dependencies are analyzed in order to find the Markstein numbers. Various methods of finding different Markstein numbers are considered. Phenomenological Markstein numbers with respect to the combustion products are obtained by means of the comparison between the measurements of the flame radii as a function of time and the results of the analytical integration of the linear relation between the flame speed and either flame stretch rate of flame curvature. The linear equation with respect to the flame stretch rate cannot approximate the experimental data corresponding to high flame curvature, while the linear equation with respect to the flame curvature approximates all the experimental data with a satisfactory accuracy. The correctness of this linear relation for highly curved flames and the effect of different data fitting schemes are briefly discussed.

• OSTI ID: 543415
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 3 Vol. 109; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
33 ADVANCED PROPULSION SYSTEMS
COMBUSTION KINETICS
DIMENSIONS
FLAME PROPAGATION
FLAMES
MORPHOLOGY
SPARK IGNITION ENGINES
TURBULENT FLOW