Abstract
φ-T map is useful for evaluating engine combustion and emission formations. The purpose of this work is to clarify the φ-T dependence of CO formation in DME combustion. CO φ-T map of DME was made from numerical calculation at constant temperature and pressure. CO formation of methane was also calculated to compare with DME, as a representative of the fuels which does not have low-temperature-oxidation mechanism. As the results, it was found that DME has two CO formation peaks, low temperature around 1000K and high temperature of over 2000K, while methane has a peak at high temperature of over 2000K. The chemical kinetic analysis showed that CO formation peninsula around 1000K in case of DME yields on low-temperature-oxidation.
