Detailed Combustion Kinetic Mechanism for a Jet Fuel Surrogate Composed of N-Decane, Iso-Cetane and M-Xylene: Construction and Validation

A detailed combustion kinetic mechanism (labeled as THU_B132_mech) for a jet fuel surrogate composed of n-decane, iso-cetane and m-xylene (B132 surrogate) was developed. By integrating published combustion kinetic mechanism in detail for each component mentioned above with a recently advanced chemical scheme detailing the combustion of H2/CO/C1-C4 hydrocarbons, THU_B132_mech is completed by 2567 chemical species allowing 10236 elementary reactions. AramcoMech 3.0 is selected as the core C0-C4 mechanism to the development of THU_B132_mech, while those sub-mechanisms for the combustion of n-decane, iso-cetane, and m-xylene are respectively put forward by Sarathy et al., Raza et al., and Mehl et al. At the same time, necessary modification to each sub-mechanism has also been carried out in the construction of THU_B132_mech. The performance of this fresh kinetic scheme is then testified with the measured ignition delay times for lean mixtures of B132 surrogate and air ( [[EQUATION]] ) in a RCM facility at a compressed pressure corresponding to 20bar over a temperature scope of 739-817K. Additionally, the validity of this new comprehensive mechanism constructed has further been evaluated extensively against a number of experiment results of real jet fuel available in literature, such as ignition delay times, species distributions during pyrolysis and oxidation, etc. As a reference, the predictive capability of POLIMI_TOT_1512 is also investigated under the same conditions. According to the calculated results, THU_B132_mech coupled with B132 surrogate is able to accurately reproduce the aforementioned combustion properties of jet fuel. What’s more, by contrast to POLIMI_TOT_1512, THU_B132_mech demonstrates a stronger capability to capture the subtle variations in the ignition process of Jet A across a wide range of operating conditions.