Effect of Temperature Conditions on Flame Evolutions of Turbulent Jet Ignition

Turbulent jet ignition technology can significantly improve lean combustion stability and suppress engine knocking. However, the narrow channel between pre-chamber main chamber leads to some difficulties in heat exchange, which affects performance mechanical component lifetime. To clarify effect of temperature conditions on evolutions turbulent ignition, direct numerical simulations with detailed chemical kinetics were employed under engine-relevant conditions. The flame propagation early-stage investigated. results show that depending conditions, two types configuration be identified chamber, i.e., normal spherical propagation, latter is closely associated pressure wave disturbance. Under low-temperature cold stoichiometric mixtures vortexes induced by flow determine development chamber. intermediate pre-flame release leading waves are channel, regarded as a transition different modes. Whereas high-temperature irregular auto-ignition events start occur, fronts behaving faster propagation.