TY - JOUR
TI - Numerical study of effects of the intermediates and initial conditions on flame propagation in a real homogeneous charge compression ignition engine
AU - Zhang Meng
AU - Wang Jinhua H
AU - Huang Zuohua H
AU - Iida Norimasa
JN - Thermal Science
PY - 2014
VL - 18
IS - 1
SP - 79
EP - 87
PT - Article
AB - The premixed flame speed under a small four stock homogeneous charge  compression ignition engine, fueled with dimethyl ether, was investigated.  The effects of intermediate species, initial temperature, initial pressure,  exhaust gas recirculation, and equivalence ratio were studied and compared to  the baseline condition. Results show that, under all conditions, the flame  speeds calculated without intermediates are higher than those which took the  intermediates in consideration. Flame speeds increase with the increase of  crank angle. The increase rate is divided into three regions and the increase  rate is obviously high in the event of low temperature heat release. Initial  temperature and pressure only affect the crank angle of flame speed, but have  little influence on its value. Equivalence ratio and exhaust gas  recirculation ratio do not only distinctly decrease the flame speed, but also  advance the crank angle of flame speed.