Abstract

n the late 1960s Gray and Yang developed the first reduced kinetic model for the oxidation of hydrocarbon fuels that qualitatively described many features observed experimentally. Since then a number of reduced kinetic models have been proposed in the literature. In this contribution we analyse the steadystate behaviour of one such scheme. The chemical component of the model contains four chemical species undergoing six reactions. By making a poolchemical approximation this system is reduced to three coupled nonlinear differential equations: a temperature equation and equations for two reactive chemical intermediates. It is shown that any steadystate solution of this model having a steadystate temperature greater than 420 (K) is nonphysical as the steadystate concentration of the chemical species are negative. Hence this particular scheme does not simulate closedvessel experiments and is defective as an extension of the GrayYang model.