Comparative analysis of three mathematical models of hydrogen ignition

Three models of chemical kinetics of hydrogen combustion in oxygen and three gas-dynamic models of the flow of a reacting mixture behind the front of an initiating shock wave are analyzed. The computed data are compared with experimental results in terms of the ignition delay versus temperature. It is demonstrated that the choice of the criterion determining the ignition delay for comparisons with experimental data is of major importance. A numerical analysis of three kinetic schemes of hydrogen ignition shows that a scheme with 38 reactions of 8 species offers the best description of experimental data in the range of temperatures from 1000 to 2800 K.