7Ignition delay times of ethanol/DME/air mixtures were measured in a rapid compression machine and in two high-8 pressure shock tubes at conditions relevant to internal combustion engines. The influences of these conditions on the 9 auto-ignition behavior of the mixture blends were systematically investigated. Our results indicate that, in the low 10 temperature range (650 -950 K), increasing the amount of DME in the fuel mixture increases. At higher 11 temperatures, reactivity is controlled by ethanol and there is almost no visible impact of the fuel mixture 12 composition, whereas DME shows a slower reactivity. The experimental measurements were simulated using an 13 updated mechanism for ethanol which includes the latest experimental or theoretical work in the literature. Results
14indicates that the model is in satisfactory agreement with all of the mixtures. 15 16
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