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Steady periodic structure of a flame with a finite cell amplitude

Journal Article · · Combust., Explos. Shock Waves (Engl. Transl.); (United States)
DOI:https://doi.org/10.1007/BF00748623· OSTI ID:6960716
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The study of steady cellular flames with a finite cell amplitude is a generalization of the investigation of flame stability in a linear approximation, with solution of the problem in an approximation of higher order. Evidently, most cellular structures observed in both plane and spherical flames are the result of diffusional-thermal instability of the flame. Such structures are usually observed in rich mixtures of hydrocarbons with cell dimensions of the order of the flame thickness. The present work was prompted by experimental results on cellular structure with characteristic cell sizes much greater than the flame thickness. The influence of dissipative processes is taken into account under the assumption that the velocity of flame propagation through the fuel mixture depends on the form of the flame surface, in accordance with the results of linear thermal-diffusion stability theory. In addition, it is assumed that long-wave perturbations are stabilized because of the presence of constant acceleration (due to gravity of gas motion with acceleration) in the system.

OSTI ID:
6960716
Journal Information:
Combust., Explos. Shock Waves (Engl. Transl.); (United States), Journal Name: Combust., Explos. Shock Waves (Engl. Transl.); (United States) Vol. 23:2; ISSN CESWA
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACCELERATION
AMPLITUDES
COMBUSTION INSTABILITY
COMBUSTION PRODUCTS
DIFFUSION
ENERGY LOSSES
FLAME PROPAGATION
FLAMES
FLOW RATE
FLUID FLOW
FLUID MECHANICS
FUELS
GAS FLOW
GAS FUELS
HEAT LOSSES
HYDROCARBONS
HYDRODYNAMICS
INSTABILITY
LOSSES
MATHEMATICAL MODELS
MECHANICS
NONLINEAR PROBLEMS
ORGANIC COMPOUNDS
PERTURBATION THEORY
PRESSURE EFFECTS
STEADY-STATE CONDITIONS
THERMAL DIFFUSION
WAVELENGTHS