A physical model for simulating combustion systems in laminar flow rea
ctors has been developed. The one-dimensional model is derived from th
e conservation equations and thermodynamic relations, and includes tra
nsport phenomena. It is an extension of zero-dimensional models propos
ed by others, and enables the chemical time to be interpreted accurate
ly. A numerical program has been developed for solving the governing e
quations, and has been coupled both with CHEMKIN, an advanced package
designed to facilitate simulations of elementary chemical reactions, a
nd with TRANSPORT PACKAGE, a package capable of evaluating the transpo
rt property coefficients. The numerical code has been used to simulate
ethane combustion. Good agreement with experimental results was obtai
ned.