Study on Compression Ignition and Combustion in DME-Air Premixture Using a Rapid Compression Machine

Abstract

The auto ignition and combustion behaviors of dimethyl ether (DME) fuel as homogeneous mixture with air was investigated at gas density of constant by using a rapid compression machine technique. The ignition delay of DME-air premixture increases with increasing equivalence ratio at the constant stroke where as the ignition delay both of C_2H_6-air mixture and of C_3H_8-air mixture decreases with increasing equivalence ratio. The ignition delay of C_3H_8 was a function of mixture temperature and equivalence ratio at the constant gas density, but the ignition delay of DME in the Arrhenius Plot was roughly independent on equivalence ratio.