A numerical study of thermal ignition

Technical Report · Wed Jun 01 04:00:00 EDT 1988

OSTI ID:6949785

Lutz, A E

The general objective is to characterize the thermal ignition of combustible gas mixtures. Thermal ignition is the spontaneous explosion that occurs after a chemical induction period. The study emphasizes the influence of gas dynamic disturbances on the induction time and the presence of local ignition centers in the bulk mixture. The study contains three major elements. First, chemical kinetics computations are used to quantify the influence of disturbances on the induction times for homogeneous mixtures at constant volume. The constant-volume approximation is then replaced by a gas dynamic constraint to model ignition of an exothermic center. Finally, a one-dimensional model for an inert gas with energy deposition is developed to simulate the gas dynamics of the explosion.

• Research Organization: Sandia National Labs., Livermore, CA (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6949785
• Report Number(s): SAND-88-8228; ON: DE88013151
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603 -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACETYLENE
ACTIVATION ENERGY
ALKANES
ALKENES
ALKYNES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
ELEMENTS
ENERGY
EQUATIONS
EQUATIONS OF STATE
ETHANE
ETHYLENE
EXPANSION
FLUIDS
GASES
HYDROCARBONS
HYDROGEN
IGNITION
KINETICS
MATHEMATICAL MODELS
METHANE
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
REACTION KINETICS
RESEARCH PROGRAMS
SHOCK WAVES
SIMULATION
THERMAL EXPANSION
THERMOCHEMICAL PROCESSES
THERMODYNAMICS