Propagation of convective combustion in two-phase systems with longitudinal porosity and transition into the underdriven detonation regime

Journal Article · Sat Oct 31 23:00:00 EST 1987 · Combust., Explos. Shock Waves (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00748786· OSTI ID:7168518

Smirnov, N N

It is well known that the rate of normal layerwise combustion of solid unitary fuels is relatively low and is determined by heat conduction in the condensed phase. In the case of the combustion of porous charges the flame can penetrate into cracks and pores and be strongly accelerated in longitudinal channels. This leads to the appearance of convective combustion regimes, in which the flame propagates with velocities three orders of magnitude higher than the velocity of the combustion of a monolithic fuel. In this paper a theoretical model is proposed for the nonstationary propagation of a convective flame front in porous solid fuel and in fuel with longitudinal channels, and the conditions for the appearance of convective combustion and the emergence of the process into a regime exhibiting the characteristics of pseudounderdriven (weak) detonation are studied.

• OSTI ID: 7168518
• Journal Information: Combust., Explos. Shock Waves (Engl. Transl.); (United States), Journal Name: Combust., Explos. Shock Waves (Engl. Transl.); (United States) Vol. 23:3; ISSN CESWA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
COMBUSTION WAVES
COMPRESSIBILITY
CONVECTION
DETONATIONS
ENERGY TRANSFER
FLAME PROPAGATION
FLAMES
FLUID FLOW
FLUIDS
FRICTION FACTOR
FUELS
GAS FLOW
GASES
HEAT TRANSFER
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NATURAL CONVECTION
POROSITY
REACTION KINETICS
SOLID FUELS
THERMAL CONDUCTION
WAVE PROPAGATION