Nonstationary combustion regimes in porous powders

Journal Article · Mon Oct 31 23:00:00 EST 1983 · Combust., Explos. Shock Waves (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00782853· OSTI ID:6811968

Akhatov, I S; Vainshtein, P B

This article proposes a mathematical model of the process of convective combustion of porous powdered systems. Possible developments of convective combustion are analyzed, including the nonstationary two-front regime and the continuous combustion detonation transition regime. The planar one-dimensional motion of the porous powdered medium is considered in the presence of heterogeneous chemical reactions. A set of incompressible, but deformable particles are examined. The equations of the mechanics of heterogeneous reacting media are used to describe the motion and combustion of porous powdered media. It is determined that two convective combustion regimes are possible in powdered systems. At low ignition temperatures, a smooth transition from convective combustion to detonation occurs. At high ignition temperatures, the combustion-detonation transition does not occur, but a nonstationary two-front complex is formed, consisting of a porous frame compression wave and a convective combustion front, which supports the wave. It is shown that these fronts propagate at constant but different velocities.

• Research Organization: Moscow
• OSTI ID: 6811968
• Journal Information: Combust., Explos. Shock Waves (Engl. Transl.); (United States), Journal Name: Combust., Explos. Shock Waves (Engl. Transl.); (United States) Vol. 19:3; 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
COMPRESSION
CONVECTION
DETONATIONS
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
HETEROGENEOUS EFFECTS
IGNITION
KINETICS
MATHEMATICAL MODELS
ONE-DIMENSIONAL CALCULATIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLES
PHASE VELOCITY
POROSITY
POWDERS
REACTION KINETICS
TEMPERATURE DEPENDENCE
VELOCITY
WAVE PROPAGATION