Abstract
An analytical method of estimating auto-ignition delay time based on dissociation and recombination rates of gases has been developed. In this analytical method, the one-dimensional gas-dynamics equations are combined with reaction-kinetics equations to formulate a, set of ( n +5) simultaneous, nonlinear-first-order differential equations, where n is the number of species considered. These equations describe the behavior of a mixture of reacting gases flowing supersonically down a duct. A computer program has been evolved and used to solve these equations for the particular case of hydrogen-air mixtures. The ignition delay periods obtained through this program are in good agreement with the limited amount of experimental data available for hydrogen and air.
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