Influence of multi-parameters on local instantaneous flame temperature and soot concentration in cylinder of diesel engines

Abstract

In the present study a new improved two-color method based on particulate diffraction theory was used to investigate the local instantaneous flame temperature and soot concentration in cylinder of diesel engiens.Two representative measurement locations were arranged in the cylinder head which face the crown and the bowl of the piston separately.A significant difference of magnitude both in soot concentration and flame temperature was found between the two measurement locations,and the time difference of appearance was about 10° CA.There was a large cycle variation at the measurement location facing the crown.The influence of multi-parameters including load,speed,intake air temperature and cooling water temperature on local instantaneous flame temperature and soot concentration in cylinder of diesel engines was discussed analytically.