Mathematical modeling of pyrolysis of semitransparent composite materials

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Combust., Explos. Shock Waves (Engl. Transl.); (United States)

OSTI ID:6548089

Grishin, A M; Sinitsyn, S P

Due to the increasing industrial use of polymer binder composites, there is definite value in investigating pyrolysis for the theory of combustion for these materials. The present work is devoted to an investigation of the pyrolysis of a glass-plastic tube with the propagation of radiation in the composite taken into account. A system of equations is derived describing the pyrolysis of a cylindrical tube of semitransparent composite material on whose internal surface a radiant heat flux of known magnitude is incident. An algorithm for the numerical solution to the problem is given with a difference mesh selected to give sufficiently good accuracy. Solution to the problem shows that below a limiting temperature, a quasistationary pyrolysis mode is realized for values of radiant heat flux below the critical value, while explosive decomposition occurs above this value. Likewise, for a fixed radiant heat flux value, the pyrolysis process is quasistationary below the limiting temperature, while above this temperature, the process enters the ignition mode. This mode is characterized by a maximum in pressure, and gaseous pyrolysis products spread out on both sides of the intensity pyrolysis zone. Up to the time of ignition, the convective energy transfer into the bulk of the material can be neglected.

• Research Organization: Tomsk
• OSTI ID: 6548089
• Journal Information: Combust., Explos. Shock Waves (Engl. Transl.); (United States), Journal Name: Combust., Explos. Shock Waves (Engl. Transl.); (United States) Vol. 18:4; ISSN CESWA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACCURACY
ALGORITHMS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
COMPOSITE MATERIALS
CONVECTION
DECOMPOSITION
EQUATIONS
GLASS
HEAT FLUX
IGNITION
KINETICS
LIMITING VALUES
MATERIALS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
NUMERICAL SOLUTION
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
PYROLYSIS
REACTION KINETICS
SYNTHETIC MATERIALS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TUBES