Deflagration/Autoignition/Detonation Transition Induced by Flame Propagation in an N-Decane/O2 /Ar Mixture

Analysis of ECN spray A ignition in a Rapid Compression Machine using simultaneous OH* chemiluminescence and formaldehyde PLIF

“…Besides, fuel stratification is also expected to drive the first stages of the growth of formaldehyde kernels. The cool flame propagation phenomenon was mentioned in other studies [25,26,31,32], and also in DNS of jets of different fuels in hot oxidizer environment [21][22][23][24], eventually in canonical configurations directly related to spray A ignition. Our observations present similarities with the phenomenology described in these works, at the first instants of low temperature ignition: several low temperature kernels form in a leaner region on the spray sides and propagate fast towards richer regions.…”

Three-stage auto-ignition of n-heptane and methyl-cyclohexane mixtures at lean conditions in a flat piston rapid compression machine

“…Studying the auto-ignition behavior of fuels is of interest for knock mitigation in spark ignition engines [1]; for efficiency improvements and emissions reductions in compression ignition engines [2]; and for controlling combustion phasing and pressure rise rate in homogenous charge compression ignition (HCCI) engines [3,4]. Fuel ignition quality can be quantified in idealized reactors, such as the ignition delay time (IDT) obtained from shock tubes (IDT < 4 ms) or rapid compression machines (RCM) (IDT > 3 ms) [5].…”