TY - JOUR
TI - Combustion simulation in a spark ignition engine cylinder: Effects of air-fuel ratio on the combustion duration
AU - Dinler Nureddin
AU - Yucel Nuri
JN - Thermal Science
PY - 2010
VL - 14
IS - 4
SP - 1001
EP - 1012
PT - Article
AB - Combustion is an important subject of internal combustion engine studies. To  reduce the air pollution from internal combustion engines and to increase the  engine performance, it is required to increase combustion efficiency. In this  study, effects of air/fuel ratio were investigated numerically. An  axisymmetrical internal combustion engine was modeled in order to simulate  in-cylinder engine flow and combustion. Two dimensional transient continuity,  momentum, turbulence, energy, and combustion equations were solved. The k-e  turbulence model was employed. The fuel mass fraction transport equation was  used for modeling of the combustion. For this purpose a computational fluid  dynamics code was developed by using the finite volume method with FORTRAN  programming code. The moving mesh was utilized to simulate the piston motion.  The developed code simulates four strokes of engine continuously. In the case  of laminar flow combustion, Arrhenius type combustion equations were  employed. In the case of turbulent flow combustion, eddy break-up model was  employed. Results were given for rich, stoichiometric, and lean mixtures in  contour graphs. Contour graphs showed that lean mixture (l = 1.1) has longer  combustion duration.