Overall Kinetic Parameters and Laminar Burning Velocity from Pressure Measurements in Closed Vessels

Abstract

The experimental pressure-time patterns measured during methane-oxygen-nitrogen explosions in a constant-volume bomb were analyzed by means of a lumped-parameter mathematical model. The use in this model of two explicit expressions for the dependence of the laminar burning velocity on pressure, temperature and composition derived from the solutions of the flame equations obtained by asymptotic methods, allowed the evaluation of the kinetic parameters of the overall reaction of combustion, and of the laminar burning velocity. A method of data analysis based on the concepts of non-linear identification was used to increase the accuracy of computations. The computed results, both for the laminar burning velocity and for the overall reaction rate, fairly agree with literature data.