SIMULATION OF SPARK CREATED TURBULENT FLAME DEVELOPMENT THROUGH NUMERICAL STOCHASTIC REALIZATIONS

A model for early flame kernel development that allows for individual stochastic realizations is proposed. The following concepts are used i n the model: the flamelet concept, the flame broadening concept, the c oncepts of flame quenching by turbulence and early flame kernel extinc tion due to heat loss into the spark electrodes. The model simulates b oth cycle-by-cycle variation and lean misfire limit in an SI engine. C omparison between numerical results and measurements of spark-ignited kernels under a variety of conditions verify the validity and universa lity of the model.