Abstract
The compression ignition of Dimethyl Ether has two stages of combustion, which were known as cool and hot flame respectively. Since the temperature and pressure of mixture was increased by the heat release during cool flame, the amount of heat release during cool flame has strong effects on ignition of hot flame. In this paper, the effects of CO_2/H_2O addition on heat release of cool flame were investigated from chemical kinetic computations. From the systematic computations, it was confirmed that the amount of heat release at cool flame depends strongly on the concentration of O_2 at cool flame onset.
