Jet ignition prediction in a zero-dimensional pre-chamber engine model

This paper presents a multi-chamber, multi-zone engine model to predict the ignition of lean main chamber by pre-chamber. The two chambers are connected small cylindrical holes: flame is ignited in pre-chamber, hot gases propagate through holes and ignite Turbulent Jet Ignition (TJI). original features are: (i) separate balance equations for pre- chambers, (ii) specific temperature composition evolution (iii) DNS-based fresh burnt turbulent jets exiting holes. Chemical reactions during TJI result competing mixing processes: (1) jet mix with produce heated zones (2) at same time, these cool down. increases combustion leads while decreases it can prevent ignition. overall outcome (ignition or failure) too complex be modelled simply present relies on recent DNSs which provided method occurrence Incorporating this DNS information into allows predicts whether will occur not, an not accessible otherwise using simple models. resulting approach tested multiple cases limits very cases, effects H2 injection pre-chamber optimum size connecting as function equivalence ratio.