Abstract
To understand the onset and propagation of low temperature flames in the cylinder of internal combustion engine, we have tried to reproduce the observed result of rapid compression experiment done by Kojima and Katsumi, using the detailed chemical kinetic model of n-butane autoignition developed by Curran, et al. and a commercially available 3-D numerical fluid dynamics code (CONVERGE). Although the onset of hot flame in the experiment occurs much earlier than that in our calculation, the onset and propagation of cool flame in the calculation fairly agree with those in the experiment. As for the onset and propagation of blue flame and hot flame, we can understand the details that could not be obtained from the insufficiently time-resolved experimental photographs. For example, each propagation of cool, blue, and hot flames corresponds to the movement of mol-fraction peak or the expansion of high-density region of three radicals, HCO, HO_2, and OH.
