The autoignition delays of mixtures of methyl-cyclohexane (MCH), oxygen,nitrogen, and argon have been studied in a heated rapid compression machineunder the conditions $P_C$ = 50 bar, $T_C$ = 690 - 910K. Three differentmixture compositions were studied, with equivalence ratios ranging from $\phi$= 0.5 - 1.5. The trends of the ignition delay measured at 50 bar were similarto the trends measured in earlier experiments at $P_C$ = 15.1 and 25.5 bar. Theexperimentally measured ignition delays were compared to a newly updatedchemical kinetic model for the combustion of MCH. The model has been updated toinclude newly calculated reaction rates for much of the low-temperaturechemistry. The agreement between the experiments and the model wassubstantially improved compared to a previous version of the model.Nevertheless, despite the encouraging improvements, work continues on furtheradvances, e.g. in improving predictions of the first stage ignition delays.
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