Reduction and verification of models of surrogate fuels for RP-3 aviation kerosene coupled with NOx

Abstract The coupling of a semi-detailed chemical reaction model of three-component surrogate fuels for RP-3 aviation kerosene with NOx-related reactions in the GRI-Mech 3.0 methane mechanism is realized with three different methods. Two schemes are used in the reduction process while using the program ReaxRed to simplify the chemical reaction mechanisms coupled with NOx-related reactions. First, the revised-direct relation graph (Revised-DRG) method is used, providing an initial reduction. The result is, thereafter, applied to the computational singular perturbation (CSP) method (scheme 1) or to the path flux analysis (PFA) method (scheme 2) to enhance the reduction process, resulting in six simplified models. The comparison of several important parameters, such as ignition delay times (IDTs) between simplified models, initial models, and experimental data is realized to elect the best simplified model (109 components, 498 steps). Two methods are, therefore, developed to simulate NOx emission characteristics with the simplified models in a jet stirred combustion reactor (JSCR). The simulation results are, afterward, compared with the experimental results. As a result, the elected simplified model is also able to predict the NOx emission characteristics of RP-3 aviation kerosene within a specific range of conditions.