Modeling cycle-to-cycle variations in spark ignited combustion engines by scale-resolving simulations for different engine speeds

Mahdi Ghaderi Masouleh, K. Keskinen, Ossi Kaario, Heikki Kahila, Shervin Karimkashi, Ville Vuorinen
Cyclic variation is numerically investigated in a spark-ignited lean gas engine. • The cyclic variations are explained using local flame analysis. • Turbulence around the early flame front is the major contributor to the observed CCV. • Flame kernel is more prone to local conditions when it is small. • The higher the RPM, the longer the initial effects may persist in CAD time.
doi:10.3929/ethz-b-000342848 fatcat:r7mljjkhqjcojh6tn47r4gwffy