Abstract
Ethanol has the same theoretical air-fuel ratio as DME but has different reactivity. In this study, effect of ethanol blending on ignition and combustion of DME spray was investigated by numerical calculation. As the results, the ignition timing retards and the equivalence ratio in a spray shifted toward lean with ethanol blending. NOx emission decreases when ethanol ratio of 30% or higher because the ignition delay elongates after the end of injection.
