The Addition Effect of CH3Br on Methane Ignition behind Reflected Shock Waves

摘要

The addition effect of CHBr on the ignition of methane was investigated in the temperature range of 1537-1920 K behind reflected shock waves. The ignition delay times were measured by the sudden increase of pres-sure and OH emission in the CH-O-Ar system containing small amount of CHBr. The delay times of mix-tures with CHBr were shorter than those without CHBr. The promotion of ignition by CHBr was caused by the relative fast decomposition rate in additive. To clarify the addition effect of CHBr from the viewpoint of the reaction mechanism, computational analyses were performed in CH-CHBr-O-Ar mixtures.