Applications of reduced reaction mechanism for numerical calculations in supersonic combustion of kerosene fuel

In this numerical study, the efficiency and accuracy of a new reduced mechanism (26species and 89 reactions) on the predictions of supersonic combustion in a model combustor are investigated, and the dynamic combustion process of RP-3 aviation kerosene in a model combustor is studied numerically. First, the predicted values of steady combustion are validated by the experimentally measured wall static press, and the results compared with quasi-global chemical reaction mechanism show that the reduced mechanism has better accuracy in combustion simulation. Furthermore, the unsteady combustion characteristics of a scramjet combustor with two different chemical reaction mechanisms are analyzed in detail. Predictions of the mass fractions of major species, such as alkanes, alkenes, and cycloalkanes species are presented and discussed. The calculations show that the reduced mechanism predicts the myriad details of the reacting flow field accurately, including the ignition delay and the process of heat release, which can improve the combustion simulation accuracy.