Evaluation of the impact of initial temperature of the constant volume combustion chamber on a determination of ignition delay of N-heptane

Several methods have been applied to determine the ignition delays as so the cetane number of fuels including the shock tube, rapid machine compression (RMC), Cooperative Fuel Research (CFR). In the last decades, the constant-volume combustion chamber system designed to measure ignition delay of low-volatility fuels were developed. The purpose of this article was analysed the behavior of the combustion and ignition delay of the n-heptane obtained in Fuel Ignition Tester (FIT). The N-heptane is the primary reference fuel for determination of ignition delays. The preliminary results are important because small temperature changes can generate wrong results of ignition delay.