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Dimethyl Ether Autoignition In A Rapid Compression Machine: Experiments And Chemical Kinetic Modeling, Gaurav Mittal, Marcos Chaos, Chih-Jen Sung, Frederick Dryer
Dimethyl Ether Autoignition In A Rapid Compression Machine: Experiments And Chemical Kinetic Modeling, Gaurav Mittal, Marcos Chaos, Chih-Jen Sung, Frederick Dryer
Dr. Gaurav Mittal
Dimethyl ether (DME) autoignition at elevated pressures and relatively low temperatures is experimentally investigated using a rapid compression machine (RCM). DME/O2/N2 homogeneous mixtures are studied over an equivalence ratio range of 0.43–1.5 and at compressed pressures ranging from 10 to 20 bar and compressed temperatures from 615 to 735 K. At these conditions RCM results show the well-known two-stage ignition characteristics of DME and the negative temperature coefficient (NTC) region is noted to become more prominent at lower pressures and for oxygen lean mixtures. Furthermore, the first-stage ignition delay is found to be insensitive to changes in …